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A traveler’s review of the Grundig G6 shortwave radio

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The Grundig G6 makes for an excellent travel companion

Last week, I traveled to New York City by air and used trains, taxis and buses en route to Philadelphia. All the while, I carted along my luggage–and it’s a good thing I like to travel light.

Indeed, I almost never check in luggage, no doubt a remnant of my days as an expatriate, when I was required to travel throughout Europe at a moment’s notice. But I love traveling with only one bag. It’s incredibly liberating. I revel in the challenge of fitting everything I need into one Eagle Creek convertible backpack/suitcase.

This latest trip was no exception, and I planned to do a little shortwave and medium wave DX along the way. So which radio did I reach for? Oddly enough, none of those I listed from my travel radio suggestions, my usual stand-bys. This time, I chose my Grundig G6.

Keypad for direct entry and as with most Grundig radios, the G6has a logical, simple key combination for entering frequencies.

I have had a mini Grundig G6 review out for a couple years now in which I praise it highly. I am surprised to find that many other reviewers only give it a lukewarm rating. I believe a lot of this stems from the fact that the radio’s aircraft band (117-137 MHz) is not terribly sensitive or selective. Since purchasing the G6, I’ve only used the aircraft band once–during review. I leave aircraft and VHF/UHF listening to a proper scanner, preferably one with triple-conversion circuitry.

Yet I find that the Grundig G6 performs quite well on the shortwave and medium wave bands. Last week, while in NYC and Philadelphia, I was surrounded by big signals and didn’t hear many instances of overloading or imaging. Sure, larger portables (like the Grundig G3, Tecsun PL-660, Sony ICF-SW7600GR, Sangean ATS-909X) will outperform the G6 on SW and MW, but none of those radios can comfortably fit in my pocket. In fact, the G6 is so small that it can get lost in my suitcase–oh, there it is, tucked among my socks. The portables mentioned above, though reasonably sized, will need some dedicated space.

The placement and orientation of the tuning knob on the G6 is genius. My favorite ultra-portable radio for band-scanning

There’s another plus about the G6. It feels good in your hand. I have big, clumsy fingers, yet I still manage to punch in the frequency correctly every time. Having the (smooth) tuning knob in the upper left corner of the radio where it’s accessible both on the side, and (more importantly) on the face, was a stroke of ergonomic genius by this little radio’s designer. I wish more manufacturers would do this. It’s so easy and comfortable to band scan using your thumb on the face of the tuning wheel, which is great when you’re sitting around a campfire or listening to FM on a bumpy bus ride.

Don’t get me wrong: if I were going on a DX vacation where I needed top-notch filtering, sync-detection and SSB, I would not pick the G6. For the odd business trip, though, it’s the perfect little radio.

The G6 even has an external antenna connection.

Pros:

  • Small, affordable and full-featured
  • Shortwave and medium wave reception are comparable to others in price class
  • Two bandwidth choices
  • Direct keypad entry of frequencies
  • Fluid and well-placed tuning knob
  • No chuffing/muting during band scans
  • Includes SSB (see con)
  • Great audio for a tiny speaker
  • Excellent ergonomics (especially for such a small package)
  • Aircraft Band (see con)

Cons:

  • SSB reception is mediocre–fine tuning is difficult
  • Volume button increments a little too steep (between 8-12) with headphones
  • Keypad not backlit
  • Some image problems on aircraft band

The Grundig G6 has been on the market a long time, in a consumer electronics life span. I would not wait to purchase one. Occasionally, RadioShack (in the US and Canada) will close out their stock of shortwave radios and the G6 can be found at bargain prices. Universal Radio currently has a promotion where if you buy a Grundig Satellit 750 for $299.95, you will receive a free Grundig G6. You get both a large portable/tabletop radio and a pocket-sized one in the same deal. That’s great value!

Want specifications and other reviews of the Grundig G6? Check out our G6 entry in the Shortwave Radio Index.


Fernando’s review of the Bonito 1102S RadioJet software defined receiver

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The Bonito 1102S RadioJet - Click to Enlarge

SWLing Post reader and fellow SW radio reviewer, Fernando, has apprised us of his review of the Bonito 1102S RadioJet. While his site is in German, which we don’t read or speak here, Google Translate gives us English speakers a fair idea of his findings, and Fernando helps us with the rest.

To summarize, his comparison of the Bonito 1102S RadioJet with his Microtelecom Perseus concludes that the two perform well, running about neck-and-neck–in other words, offer almost identical performance characteristics.  There were some differences, though. I outline a few key review points that Fernando was kind enough to clarify for us:

  • The noise floor between the Perseus and RadioJet is more or less the same, in his tests.
  • He finds that the Perseus is slightly more sensitive on higher frequencies (above 22Mhz). This comparison is made with the “DX Channel” on the Bonito 1102S RadioJet (a feature only found on the Radiojet–see note below).
  • Fernando believes the sensitivity and selectivity of both radios to be very similar. He told us that he could not hear a great difference.
  • The Perseus software is, of course, very stable and mature in comparison with that of the new Radiojet. This is quite typical of new SDR products on the market, as it takes time and user feedback to eliminate bugs and quirks. Fernando expresses his confidence, however, that the software engineers at RadioJet will be quick to respond to patches and upgrades.
  • Overall, he believes that RadioJet will be able to provide a very stable product in short order.

Since Fernando has been a beta tester for the Bonito 1102S RadioJet, he’s familiar with the company and their attentiveness to feedback, and he’s impressed.

One feature unique to the RadioJet is the “DX Channel.” You can see this in action in a video the company released last year:  in essence, when activated on a weak signal, the noise floor drops, and the signal seems to pop out of the static. I asked Fernando about this feature and he told me that, when the DX Channel is activated, the software lowers the IP3+ and increases the sensitivity. This is the default channel or mode on the software.

The normal “RX Channel” is used for strong signals and is better for in-band interference. The DX Channel has a higher IP3+. He mentioned that the software can automatically determine which channel should be used, and auto-switches it for the user. Fernando said that this function works quite well.

Like to hear the difference for yourself?  Fernando’s website Fenu-Radio.ch has a page dedicated to audio comparisons between the Perseus and RadioJet. The first 15 seconds of each audio clip feature the Perseus, the second 15 seconds features the RadioJet.  Click here to go to the audio page.

By the way–Fernando’s website is most impressive. He has a long list of receiver reviews, comparisons and audio files. I encourage you to spend some time there, whether or not you read German.

Thanks for sharing your review, Fernando!

CDNSE Newstar DR111 First Review

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The DR111 DRM Radio (Photo: Chengdu NewStar Electronics)

Based on this initial review, it appears that the CDNSE Newstar DR111 is an improvement over the company’s last portable DRM radio, the DiWave.

(Source: DRMNA.info)

[T]he unit is quite sensitive. RNZI evenings at 17675kHz and 13730kHz can be received various places within my house with only the internal whip. REE at 9630kHz using an external ham vertical antenna was similar copy on Pappradio (with a slight edge given to the Pappradio.)

DRM Audio while adequate, seems narrow and compressed in comparison to DReaM on my PC. I verified this by switching A to B between the Newstar and the Pappradio with DReaM using my JBL headphones. I’m beginning to wonder if the DRM audio is being processed by the DSP, just like the analogue audio. The DSP in analogue is a tad too aggressive. A real bonus in analogue is the adjustable bandwidth (1-6kHz) however. That and the DSP make analogue quite enjoyable even in the crowded 49M (6MHz) band. I have been listening to BBC on 5875kHz in the early AM with armchair copy and great audio using only the whip (throughout the house).

Read full post here.

The Tecsun PL-380: a great travel radio

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My Tecsun PL-380 and Eagle Creek pack

SWLing Post reader, Alan, commented on our “most durable radios for travel” post:

You should include the Tecsun PL-380 [on] the list. It is an excellent tuner with good selectivity. The ETM feature was made for a traveler. The radio is cheap enough that it won’t bother you if you lose it or break it.

I have to say, I agree! In fact, I travel with the PL-380 quite often. It has become my back-up radio when I make field recordings (my primary portable for field is the Sony ICF-SW7600GR).

Eagle Creek pack with contents: Tecsun PL-380, Zoom H1 recorder, earphones, audio cables, external antenna, spare batteries and Kindle. Click to enlarge.

In fact, I have a small Eagle Creek bag with a shoulder strap that holds my field recording kit and other electronic “necessities:”  Tecsun PL-380, Zoom H1 recorder, earphones, audio cables, external antenna, spare batteries, and, of course, my Kindle (so I can read while waiting for my plane/train/bus). In a pinch, it can even accommodate a Sony AN-LP1 active antenna (which I use primarily in hotel rooms with inoperable windows). To help you visualize, check out the photo on the right.  It’s my grab-and-go bag.

 

CNET reviews the Grundig G2

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, with CNET, has written a review of the Grundig G2.  What’s more, he offers a fairly thorough review of the Grundig G2′s features and design.

First of all, I’m very impressed that CNET would bother reviewing a shortwave radio at all.  Typically, I look to CNET for reviews of portable hi-tech like cell phones, iPods, cameras, computers, and the like; to see them review a shortwave seems like a broad-minded effort.

However, the focus on the G2′s actual shortwave performance was glossed over, at best.  The reviewer merely writes:

If you’re most concerned with pulling in FM stations, you’ll be happy with the G2 Reporter. Even some stations that I’ve found difficult to tune with other portables came in strong. Tuning of AM and SW was good, too, but less reliable than FM.

And…that’s it. So much for the G2′s shortwave.

So, though this is not a review of the merits of the Grundig G2 as a shortwave radio, it does cover the radio’s recording features, battery, .mp3 and .wav file playback, battery, design, and similar features.  Which, at least, is a step in the right direction.

Click here to read the entire review.

Frank’s assessment of the Elad FDM-S1

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The ELAD FDM-S1 Software Defined Receiver

SWLing reader Frank Holden (VK3JFH/VP8DNM) contacted me by email to share his experience with the ELAD FDM-S1–of particular interest because we have yet to see many reviews of this particular software defined receiver. Although the FDM-S1 was announced with some modest fanfare, its actual release and availability skipped over many of us. Not over Frank, however:  he purchased an FDM-S1 and had it shipped to his home in Australia, where he apparently put it through its paces.

Frank’s overview of the ELAD FDM-S1 is quite good, and he has kindly given us permission to post his observations here:

I have had an ELAD FDM-S1 now for over a month, having purchased it directly from the manufacturers, and while I don’t feel qualified to write a review you may be interested in my opinion of it.

In my shack at present I have an Icom R-1500, Icom 718, Tecsun 390, Tecsun 660, Grundig G6, Sangean ATS 909, Drake SW 8, Kenwood R5000, a Funcube Dongle and an Alinco DJ-X11. In the way of antennas I have a couple of dipoles, a G5RV , and a 10 metre vertical for TX together with an AOR DC to Daylight, a Diamond discone , a GWhip longwire and a simple 7 metre long untuned vertical on a squid pole for RX.

I was going to buy my ELAD pre-release from WoodBoxRadio but language difficulties and confusion over getting it VAT-free put paid to that. I take full responsibility for the confusion……

In the end I bought one direct from ELAD sdr for 362.81 Euros VAT-free, which price included 10 Euros postage to Australia. It arrived within a week… would that everything that I bought from overseas was as cost effective and fast.

Out of the box it was simple enough to set up with just a USB connection to the computer. I have it connected to a Dell Netbook and this had to be upgraded to XP Service Pack 3 together with some .Net software, the purpose of which remains something of a mystery. I imagine with a newer computer it would operate straight out of the box. It came with a DVD which had both the .net software on it plus an early version of the operating software. I immediately upgraded this software to v3.07 which is what I am currently using.

I believe that originally the frequency range stopped at 30 MHz… however, it can now receive up to 452 MHz if this is selected in the advanced menu. As I write this I am monitoring aviation traffic on 132.200.  Likewise the original viewable spectrum was quite restricted,  but in the latest version 1.2 MHz can be viewed in the waterfall.

Tuning is straightforward… either by direct keyboard entry or by clicking on the waterfall…. there are also three ‘sliders’ at the bottom of the screen which permit ‘mouse tuning’ by either metre band, MHz, or kHz. Mode selection and quite a bit of other stuff (did I mention that this is not a technical review?) are on a drop down menu at the right hand side of the screen. DRM is included amongst the modes and I listen to RNZI DRM most evenings.

I haven’t used any of the recording options on this radio yet.  What I have been doing is either simple SWLing where the ability to monitor an entire Metre band is excellent, especially when combined with the info on the WRTV frequency guide DVD. I also use it at other times of the day  in what I suppose you could call ‘Ham’ mode where it can be left watching the 20 metre, 40 metre or other ham band and I can see when a band has opened… far simpler than scanning around…

So all in all, I am very satisfied and would recommend this SDR to anyone.

My #2 radio these days is my Tecsun 390 with its ETM… another bit of brilliant kit.

Frank also sent some helpful photos of his screen, and added:

I am currently running v.3.07 beta… the last shot is the latest  ’polished’ version   3.01.

As you can see in that shot, you can now get three screens, including an AF and an IF screen. That version also comes with a separate program that lets you work with recorded files more easily.

He even included some photos of recording:

EladScreen1 EladScreen2 EladScreen3 EladScreen4 EladScreen5 EladScreen6 EladScreen7 ScreenShot10 ScreenShot11 ScreenShot8 ScreenShot9

Thanks for your most interesting observations, Frank.  If there are any others out there who have experience with the Elad FDM-S1, feel free to comment below or simply contact me.

For those of us here in the US, to my knowledge there still is no FCC approval of this device. I have contacted Elad with this question; they’re on annual holiday leave just now.

Follow our other Elad FDM-S1 posts with the tag: Elad FDM-S1

Using and setting up the Alinco DX-R8T/E receiver as an SDR (software defined radio)

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The Alinco DX-R8T (DX-R8E in Europe) can be used as a traditional tabletop or as a software defined receiver

Some time ago, I posted a review of the Alinco DX-R8T–a surprisingly capable, flexible and affordable dedicated tabletop receiver.  In that review, I explored its capabilities as a tabletop unit, and was favorably impressed.

But I knew then that one of the virtues of the DX-R8T is that it’s more than a typical tabletop:  the control head (or, front panel) can literally be detached, and with an extension cable, can be moved as far away as 16 feet from the rest of the receiver. Also, with the optional ERW-7 cable and a shielded audio patch cord, you can connect the Alinco to your PC, converting it to a software-defined radio (SDR).  Just to be fair, I wanted to further check out this alternative operation mode, and review it independently.

I’ve recently had an opportunity to explore the Alinco DX-R8T/E as an SDR, and here’s what I’ve discovered.

As it took some time to figure out how to get KGSDR, the Alinco control software, communicating with my DX-R8T, it’s fair to state that the Alinco’s SDR functionality is not exactly “plug-and-play.”  Nor does Windows seem to find the USB driver automatically.  You must download a USB driver for your computer, as well as download KGSDR from external sites.  It’s also important to note that the Alinco website is not easy to navigate–at least, the relevant links are somewhat buried in large portions of site content.

When I first attempted to set up my receiver as an SDR, I had to use a combination of the printed owner’s manual, the Alinco website, external sites, and simple determination.

Before reviewing the actual performance of the Alinco DX-R8T/E as an SDR, I’ll simplify setting it up as an SDR with a step-by-step process, below. (I wish this was clearly outlined in the owner’s manual, however.)

How to convert your Alinco DX-R8T/E into a Software Defined Receiver

The ERW-7 is the cable that connects your Alinco DX-R8(T) to your computer.

1.) Connect the ERW-7 cable and download the  driver

The ERW-7 is the USB cable that connects your Alinco DX-R8T with your computer. Specifically, it allows your computer to tune and control the DX-R8T; it does not carry audio. If you wish to have full control of your receiver via your PC, you will need to purchase the ERW-7.

You simply plug one end of the cable (the one that looks like an 1/8″ audio connector) in the “clone” port on the back of your Alinco, the other end into an available USB port on your computer.

The download page–at FTDI Chip, the manufacturer of the Alinco cable–has versions of the USB driver for most OS platforms. If you have Windows, you can save a little time by downloading the USB setup tool that will attempt to automatically load the USB driver. Otherwise, you can download and manually install the drivers for the Windows 32 bit version or Windows 64 bit version.

You will need a shielded audio patch cord with 1/8″ stereo plugs on both ends

2.) Connect an audio patch cord

The Alinco DX-R8T/E sends the received IQ signal to your PC via a shielded audio patch cord. This is a standard audio cable that you can purchase at most electronics retailers. It needs to have 1/8″ stereo connectors on both ends, and it must be shielded.

One end of the patch cord is plugged into the IQ port on the back of the receiver, the other is plugged into the microphone input on your computer.

3.) Tell your DX-R8T/E to send the IQ audio to your computer

Your computer will need to “hear” the IQ (spectrum) audio produced by the Alinco DX-R8T/E. The receiver will only send the IQ audio to your computer if you tell it to do so. Fortunately, this is easily done:  simply press the MODE button on the front panel of your receiver until FM appears. Then, simply press the FUNCTION button, then the MODE button.  Your Alinco should now display “IQ” on the main display. You can feel confident the audio is now being sent to your PC.

4.) Install KGSDR

The KGSDR controls are very similar to those of the Ten-Tec RX-320D

KGSDR is a software-defined radio application built specifically for the Alinco DX-R8T/E receivers. A third-party software developer maintains the download page for the KGSDR. Click here to download the setup software for Windows. (If this link doesn’t work, you can also download a zipped copy by clicking here.) To my knowledge, there are no updates to the software–as of time of this post, the current version is 1.0.0.

Installation is simple and only requires that you extract the contents of the zipped folder, then run the KGSDR executable file.

If all has been installed correctly, and the IQ signal is being sent to KGSDR, then you should be able to hear the received audio via your computer.

I have actually installed KGSDR on three different computers. On my laptop, I had to troubleshoot and tweak the settings to get KGSDR to work. On the other two computers, it worked the first time.  All of them were running a 64 bit version of Windows 7.

Troubleshooting tips

If you change the tuned frequency on KGSDR from, say 5,000 kHz to 10,000 kHz, but your Alinco receiver does not change frequencies (it still displays the centered frequency on the front panel), then the USB driver has not been installed or configured properly.

If the receiver tunes, but the audio is garbled or non-existent, you will need to check the audio cord connections. First of all, make sure it’s plugged into the microphone input on your computer (not the speaker/headphone port!) and the IQ port on the back of the Alinco. You cannot plug the patch cord into any other port port on the DX-R8T/E. The plug will fit in the headphone jack, for example, but the IQ port is the only one that sends interpretable analog information to your PC.

Review:  the Alinco DX-R8T/E as an SDR

KGSDR comes with a spectrum and waterfall display (Click to enlarge)

I have read reports of people achieving remarkable results with their Alinco functioning as an SDR…I wish I could report the same.

While the Alinco DX-R8T/E is a very capable tabletop receiver, I find that the SDR functionality adds very little, performance-wise. In fact, in many respects this function seems to compromise the performance of the DX-R8T/E. Still, there are some positives:

Pros

  • Affordable – the EWR-7 USB cable is about $45 US, and you can easily buy a shielded audio patch cable for under $10. For about $55 US, you can unlock the SDR functionality of your receiver.
  • With KGSDR, you can see a bit of the surrounding spectrum on a waterfall display
  • KGSDR is a very lightweight program, not likely to tax even older PCs.
  • KGSDR allows for variable filter control–a true compensating factor since the DX-R8T/E only has a wide/narrow filter on AM (see review)
  • You get the basic benefits of typical SDR receivers:
    • Spectrum/Waterfall display
    • Recording at the push of a button (.wav only)
    • Practically unlimited memory slots
    • With practice, you can import frequency databases
    • A basic DSP filter
  • Simple “lightweight” application that should work on any Windows-based PC (see con)
  • With a DRM decoder, you will be able to receive and decode DRM transmissions (see con)

Cons

  • Performance is underwhelming–not as good as the DX-R8T as a stand-alone tabletop receiver
    • Images of strong stations several kilohertz above the source
    • DX-R8T/E sensitivity is somewhat compromised in SDR mode
    • Selectivity is mediocre
  • Audio patch cord transfers computer/shack RF noise more easily than SDRs which use a digital IQ output via USB
  • Audio fidelity, in general, is not as good as the stand-alone receiver will provide
  • KGSDR has only the most basic of SDR features
  • KGSDR does not allow the spectrum display to be expanded vertically
  • Requires tweaking and repeated efforts in order to function properly
  • Owner’s manual and website are confusing and lack vital information about the installation and trouble-shooting process (hopefully our guide above can help the average user)
  • DRM mode is not native; you will have to use a program like DREAM (see pro)

 Summary

So, is it worth it?  Well, yes––and no.

Yes

If you have $55-60 US dollars to spare, it’s a real bargain. I believe the extra SDR features  and functionality are worth the price. I have not yet tested this in a DXpedition setting, where there are a limited number of RF noise-producing devices around. If you have an RF-”quiet” location in which to use the Alinco as an SDR, you may find you have better results than I describe above.  I imagine you will still suffer from some imaging of stronger signals, however.

Plus, KGSDR is so lightweight, I believe you could use it on a netbook. Moreover, I have heard of owners who’ve actually used other open source SDR applications to drive the Alinco DX-R8T/E.  Additionally, though I have not yet tested it, N4PY makes a software controller that would be far superior to the KGSDR–I base this on the fact that N4PY’s RX-320D software was such an improvement over the standard OEM package.

No

If you wish to enhance the performance (not features) of your Alinco DX-R8T/E, I do not think it’s worth it to put your Alinco into service as an SDR.  Again, I find that it somewhat compromises the performance of what is otherwise an excellent tabletop radio.

If, like me, you have other SDRs in the shack, you’ll find that you’ll seldom use the Alinco as an SDR. Your other digital IQ-based receivers or IF receivers will most likely run circles around it.

Thanks, Alinco

I think it’s pretty cool that for under $500, you can purchase an excellent tabletop receiver like the Alinco DX-R8T/E. Its price tag is significantly lower than its top two competitors (the Icom R75 and Palstar R30A). Still, even with this price edge, Alinco added bonuses like a detachable face plate and SDR functionality, making this a “Swiss Army Knife” of a receiver. So, again,I’ll say…thanks, Alinco!

What do you think?

If you are using the Alinco DX-R8T or E as an SDR and feel you are achieving better performance than I’ve described, or would like to share any other thoughts/suggestions, please comment below. Note that my Alinco is a very early-release–perhaps from the first production run. It is possible that some of the issues I mention above have been resolved  in later production, or that I simply have not finished properly tweaking settings.  I await your responses!

 

The Degen DE1129 unboxed: initial impressions

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Degen DE1129 and box (Click to enlarge)

Yesterday, I received a sample Degen DE1129 from TecsunRadio.com, which is, to my knowledge, the only current distributor of this newest Degen. I paid extra for DHL shipping to get it quickly to my door, as I’ve been very curious how this new radio stacks up against similarly-priced portables on the market–especially in light of the number of emails I’ve gotten from readers asking about this particular radio.

The DE1129 promises a lot: AM/FM/Shortwave coverage and a fully functioning MP3 player/recorder.

I have only played with the DE1129 for a few hours, thus have only developed some initial impressions of the unit.  (A full-fledged comparison review will be coming in the very near future–simply follow the tag DE1129).

My very first impression–?  The DE1129 is just a wee little radio–much smaller than I had imagined. Indeed, though its box (pictured above) isn’t very large, it’s a cavernous container for such a minute radio. Size-wise, it’s certainly within the realm of the ultra-portable. Note its size in comparison with my Grundig G3 and Tecsun PL-380 in the photo below:

For those of you not familiar with the size of these two radios, we’re talking quite small–the Degen is just a little bigger than a pack of cards, easy to hold in one hand.

There is no mistaking the fact that this radio is DSP-based. When you turn this Degen on, it seems to boot up, like a computer–a process which takes about four seconds. It starts where you left off, i.e., at your last frequency, or in the MP3 player, if you were listening to an audio file, just before turning it off.

The Degen DE1129′s display is small, but contains a lot of information (Click to enlarge)

The display on the Degen is back-lit, although the buttons are not. The display, moreover, has an incredible amount of information for such a tiny screen. Fortunately, it is crisp enough to read easily.

You’ll note that all of the buttons are labeled in Chinese Mandarin–since I don’t know or read Mandarin, I found that this English translation of the front panel came in very handy.

I can’t comment on the performance thus far, as I can tell that the learning curve is going to be slightly steeper than usual.  I have yet to determine how to change the steps, bandwidth, AGC control (if there is one), and recording volume level.

Changing between receiver modes is simple enough; volume and tuning, of course, are intuitive.

I have very little to base a review on yet, but I can say this:  I love this Degen’s compact size, crisp display, and am impressed that its tiny built-in speaker actually has some bass response. This is the first shortwave radio I’ve reviewed that (like the Grundig G2 and Degen DE1128) has a slim rechargeable battery pack instead of accepting the typical AA batteries most portables use. No doubt, this is how they keep the size of the unit so small and its profile so slim. Is this a pro or con? Battery longevity will tell.

The back of the DE1129 (Click to enlarge)

Any negatives? Just superficial ones at this point.  Most notably, I’m disappointed in the unfortunate combination of no back stand (see photo) and a fixed, non-rotatable, telescopic whip antenna. This means that when listening to shortwave with the whip fully extended, you pretty much have to hold the DE1129 in your hand. Even if you have a universal portable radio stand (like this one), you won’t be able to make the antenna vertical in relation to the ground–rather, it will be fixed with only the ability to move from left to right.   This is, alas, poor product design, as a radio so slim has very little stability when standing with the antenna fully extended; even a slight breeze can potentially tip it over.

Also, the Degen DE1129, like the Tecsun PL-380 (and many other DSP-based radios), “chuffs” while tuning–meaning, it mutes between frequency changes. This is a pet peeve of mine, as I prefer a more uninterrupted analog-like fluidity while band scanning.  I’ll experiment to learn whether there is a way to minimize this.

Again, look for a more complete review in the near future as I test this little radio against the (similarly priced) Grundig G3 and the (more affordable) Tecsun PL-380. Simply follow the tag DE1129 or subscribe to our email updates by clicking on the link in the right panel of our site.


A review of the Degen DE1129 portable shortwave radio

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My Degen DE1129 as tested (Click to enlarge)

The Degen DE1129 is the latest compact, full-featured, DSP-based, AM/FM shortwave radio from Chinese manufacturer, Degen.  It’s available from TecsunRadio.com at $100 US, shipped. I received my sample radio last week, and published my initial impressionsof the unit. Since then, I’ve had time to put this tiny radio through its paces and learn the functions of the various buttons labeled in Chinese, which I don’t read. In the following review, we’ll study the positive characteristics–and the drawbacks–of this little radio.

Getting started:  the unit

I’ll begin by discussing some of the positive attributes of this radio. First, it should be noted that the DE1129 I have reviewed is one of the first to be produced, and as such, it currently has 18 buttons screen-printed in Chinese. Last week, Degen announced that they will be producing an English version, and (importantly) adding a number pad for keying in frequencies directly (see photo above). I have confirmed this via the manufacturer’s retailer. It will require squeezing a lot of buttons into a very small area, but I imagine this alteration will be easy enough, and probably remain functional even for those with larger fingers.

Degen has confirmed that they intend to produce a DE1129 with a number pad and English print in the future (Click to enlarge, Photo: Degen)

On the topic of buttons, those on the DE1129 are easy to push and have a very tactile response–very much like those on the Tecsun PL-380 and PL-390. I don’t expect these buttons are likely to be compressed accidentally if the radio is in your pocket, but just in case, there is a number lock button (with a key icon) that will further protect the radio.

The body of the radio is made of a hard, smooth plastic–without a rubberized coating–and seems durable enough. The speaker is not exactly flush-mounted. Instead, it protrudes from the rest of the body by about 1/4  inch. At first, I thought this quite odd, but I’m fairly sure this was in order to accommodate a larger speaker than it otherwise would have had.

For more on the DE1129 unit itself, be sure to read my initial impressions, which go into greater detail.

This little speaker packs a punch!

Audio

The audio from the built-in speaker is impressive–in fact, this is possibly the best feature of this little radio.  Just the other day, I was able to listen to an NPR FM station, with the volume turned up, as I cooked a meal; typically, I wouldn’t be able to hear a radio this small while doing other things–the output would be tinny with too much emphasis on the treble end of the audio, and the sound lost in all but a quiet room. However, the DE1129 speaker offers just enough bass to keep the audio (especially on FM, or from a quality digital audio file) comparatively rich and full. In essence, it sounds like a larger radio. Though the speaker lacks a bit of mid-range, the overall experience of listening to AM is quite pleasant, while FM is exceptional.

Digital Audio Player/Recorder

The “Music” mode will allow you to play pre-recorded MP3 files

With several of their latest DSP radios, Degen has added digital audio recording and playback features.  The DE1129 is no exception, and offers the following capabilities:

  • Records from a built-in microphone
  • Records directly from the radio while playing
  • Plays any MP3 formatted audio files
  • Offers many standard music playback options, like repeat, shuffle, etc.
  • Provides expandable memory via the insertion of a micro SD card into the radio, has 4GB of storage built-in

Perhaps the handiest feature is the fact that you can connect the Degen DE1129 to a PC, via supplied (standard) USB to miniUSB, for file transfer and maintenance. In my case, no additional software was needed for recognition of the DE1129 by my Windows 7 PC, which simply interpreted the radio as a storage device.

The “Voice” mode must be used to playback any recordings you make with the DE1129

NOTE: The DE1129 divides recordings into two different categories: “Music” or “Voice.”  ”Music” is basically any MP3 file that is stored in the root directory of the radio (when viewed on your PC). “Voice,” on the other hand, is stored in the “Voice” folder on the radio and is accessible only via the radio’s “Voice” mode. I could not find a way, for example, to record music on the FM radio and save it in the “Music” category–I believe anything that is recorded on the radio itself will be filed under “Voice.” Of course, you can connect the radio to your PC, then manually drag the files from the “Voice” folder into the root directory to have access within the “Music” mode. If you actually used the built-in microphone to make a live recording, it will also be saved under “Voice.”

My DE1129 came with two preloaded MP3s–a Kenny G song and a Chinese pop song. I added a few of my own choices and, again, was favorably impressed with audio fidelity from its tiny speaker.

Recording from the radio, however, was a different story…

First of all, a note of caution: I know that some of the DE1129′s predecessors had  quality issues, when users tried recording from the radio without setting the volume to a very precise level.  I assume that’s the reason why, when you record from the radio, the DE1129 auto-adjusts the volume level to a rather specific setting. Therefore, while the radio is recording, you cannot adjust the volume. This wouldn’t be a problem, save the fact that the volume level it sets is rather loud. The first time I tried recording from the radio, I was using in-ear, noise-cancelling headphones; the radio rapidly shot the volume level up to such a level that I had to jerk the phones out of my ears to protect them. In many situations, I find the volume level via the built-in speaker a little loud, as well. You will not be able to discreetly record your favorite show during church or while eating dinner with the in-laws! During recording, I believe this radio adjusts the volume to 20.

Oddly, while recording, the DE1129 will allow you to engage the mute function–it even shows you the audio muted icon–but it has no effect on the audio level, whatsoever.

The “Record” mode is only used to record via the tiny built-in microphone–quality is quite good for voice

There are two levels of quality when recording: 129K or 96Kbps. Regardless of the setting, I find that there is a loss of quality when recording via the built-in recorder, though perhaps slightly less than with previous Degen models. When I recorded a stong FM station at 129K, I notice at least a 20% degradation in audio quality. The recorded audio sounds slightly muffled and garbled, more like an MP3 recording made at 48 Kbps. There was a noticeable lack of the higher and lower tones which make the DE1129′s internal speaker otherwise sound quite crisp.

There is a less noticable difference in audio quality while recording AM radio (whether shortwave or medium wave/AM). No doubt, this is due to the fact that AM radio lacks the higher and lower audio characteristics and general fidelity of FM radio.  While AM recording quality is acceptable and content is intelligible, for playing back a recorded program, it certainly leaves a lot of room for improvement. As with FM recordings, AM recording sounds muffled.

I would not recommend purchasing the Degen DE1129 if you’re seeking an all-in-one unit to record quality radio on-the-go. If you can settle for a mediocre recording, and you don’t mind the fact that while you’re recording, the radio will be playing at fairly high volume, then this may be a useful feature.

Radio performance

The “FM Radio” mode is actually the mode for all radio bands, including shortwave and medium wave

While I spent the bulk of my time testing the DE1129 on the shortwave and AM/MW bands, I will cover all three bands in order of performance, starting with the best.

FM

The Degen DE1129 is an excellent FM radio. In my tests, it received both strong and weak stations with relative ease and compared very favorably to my Eton S350DL, which I routinely use for receiving weaker FM stations in my area. Again, FM sounds great via the DE1129′s built-in speaker, providing nearly room-filling sound from a very tiny package.

The DE1129 (lower right), with its competitors, the Grundig G3 (top) and Tecsun PL-380 (lower left)

Shortwave

I always spend the bulk of my radio review time on the shortwave bands, of course, and to test the DE1129, I pitted it against my trusty Tecsun PL-380 and Grundig G3. Note, however, that neither the G3 nor the PL-380 have recording capabilities.

Sensitivity

First, the good news. Shortwave sensitivity, in general, is fairly good on the Degen DE1129. With it, I was able to hear most of the weaker stations that were received by the PL-380 and G3. I believe adding a length of wire to the antenna with an alligator clip–as there is no external antenna jack–could slightly improve performance. I may test this further. Again, since the radio lacks a fold-out stand and the telescopic antenna cannot rotate, attaching a wire to the antenna will be less than practical, as this will tip the radio over.

But unfortunately, the DE1129 suffers from several shortcomings that make it the clear loser against its two similarly-priced competitors. Note that I mentioned a few of these problems in my initial impressions post. Here is more detail, by function:

This image, with English translations for the keys on my DE1129, helped me identify each button’s function. Since there aren’t many buttons, I found that only after a few minutes of using the radio, I no longer needed to reference it. Click to enlarge

AGC (Automatic Gain Control)

The pre-defined AGC level is simply inadequate for comfortable shortwave radio listening of weaker signals. As mentioned above, though the radio has the sensitivity to detect the weak signals that its competitors can readily detect, the AGC gets in the way of comfortable listening. It creates a sort of pumping effect on weak stations, and truly seems to be “all or nothing:” at times, the radio’s signal will pop into clarity, then back into obscurity–obviously, it does not handle fading very well. The G3, in contrast, even without the sync detector engaged, did a much better job.

Bandwidth

The bandwidth is fixed–non-adjustable–on the DE1129. It is adequate for general shortwave broadcast listening, but a little too wide when you have two strong stations crowded together. Several times, adjacent broadcasts would bleed into the broadcast I was monitoring. I would expect even some rudimentary bandwidth control on a radio in the $100 US price category; the G3 (at $99) has wide/narrow, and the PL-380 (at $60 US) actually can be adjusted in 1 kHz increments from 6 kHz down to 1 kHz.

Single-Side Band

The DE1129 does NOT have SSB, thus would be useless for monitoring ham radio traffic, or listening to pirate radio stations in SSB, for example. The similarly-priced Grundig G3 does, of course, have SSB.

Shortwave can only be tuned in 5 kHz steps

Frequency steps

Unfortunately, the DE1129 has fixed frequency steps at 5 kHz; you cannot adjust it to be more or less.  In comparison, both the PL-380 and G3 can be adjusted down to 1 kHz steps.

Since the DE1129 mutes between frequency changes, it creates a “chuffing” sound while band scanning or tuning much like the PL-380. The Grundig G3, in contrast, tunes with smooth, continuous sound–much like an analog radio.

Tuning Speed

I normally don’t bother commenting on tuning speed, but I find that band scanning on the DE1129 leaves something to be desired. It’s rather arduous.

The DE1129′s hard plastic band covering the tuning wheel may protect it if dropped, but it’s also in the way of your thumb for easy tuning on the side

The tuning speed is not adaptive. Meaning, if I turn the tuning dial faster, it doesn’t increase the speed of tuning. This is very frustrating, especially since the model I reviewed does not have direct frequency entry via a number keypad. If I want to move from 5800 kHz to 6100 kHz, it takes a lot of tuning to get me there!

If I were stuck with the DE1129 as my only shortwave radio, I would be forced to fill its memory bank with all of my favorite frequencies, just to make tuning easier.

The DE1129 does have two different ways to navigate the shortwave spectrum:

  • By pressing the “Shortwave” button repeatedly, the DE1129 will move you from one SW meter band to the next highest. This is the only practical way of tuning.
  • The other way, (practical only if you want to listen to something outside of the normal broadcast meter bands) is to manually tune the entire SW spectrum (2.3 – 23 MHz) in 5kHz increments. Since the tuning rate is rather slow, this is a cumbersome process to say the least. To make it go a little faster, you could allocate memory locations, say at 3, 4, 5, 6 MHz etc. to make points (or bookmarks) from which you could tune.

Noise

My observation is that the radio’s internal processor and/or display seem to inject noise into the DE1129. This is especially noticeable on medium wave (see below).

While testing the radio against the G3 and PL-380, I even noticed that I could hear the (tuning) encoder noise of the DE1129, emanating from it, and even from other radios operating within two feet of it. Each tuning increment (via the tuning wheel) would produce a clicking sound in the audio of not only the DE1129, but even more noticably in that of other radios. The DE1129 is obviously generating a little RF noise of its own.

SW Summary

At $100 US, the DE1129 is simply not a good value for those interested in shortwave radio performance. Perhaps if it were in the $40-50 category, my expectations would be lower, and it might meet them at this price point. At the very least, a wide/narrow bandwidth control and the ability to speed up/slow down tuning speed would make this a more pleasant  and functional radio.  The sloppy AGC alone, though, would still keep me from recommending the DE1129 as a good shortwave radio.

AM/Medium Wave

On the positive side, the DE1129 can be used in any ITU region as the user can specify either 9kHz or 10 kHz spacing, although there is no option for choosing frequency steps less than 9 kHz.

How well does the DE1129 perform on medium wave? Not so well, I’m afraid–it’s mediocre at best. Medium wave suffers from many of the same problems as shortwave (described above), including the fact that the DE1129′s AGC (Auto Gain Control) simply cannot handle the up-and-down nature of weak AM stations.

Ticks like a clock?

Perhaps worst of all, though, is a “ticking” sound that plagues this Degen’s audio on the medium wave band. Spaced almost at second intervals, this “ticking” sound is present most anytime I listened to an AM broadcast. It was less noticeable in robust local broadcasts, but was still there, nonetheless. Recording a broadcast only seemed to make it more noticeable.

Unfortunately, if you purchase the DE1129 to listen to medium wave, you are likely to be disappointed.

The DE1129′s thin rechargeable pack fits neatly into the battery compartment on the back of the unit

Battery

As mentioned in my initial impressions, the DE1129 operates on a slim 3.7V 850 mAh Li Ion battery pack. Unlike most other shortwave portables on the market (but similar to the Grundig G2 and Degen DE1128), it does not operate on AA batteries.

No doubt, the slender battery pack allows for the compact form factor of the DE1129. In my testing, I found that the battery life is very good. Indeed, I have not needed to re-charge the battery even though I’ve played the radio for many hours in testing. I cannot speak to the overall longevity of the battery pack, however.

While I’m sure these battery packs are convenient, I still prefer the traditional AA battery.  If this battery pack wears out, I will have to order a replacement, whereas most portable radios only require the ubiquitous AA cell.

Stacking up the pros and cons

The rechargeable battery pack is very slim

Every radio has positive and negative attributes, and the DE1129 is no exception. Alas, in this case–especially since I’m reviewing this with a focus on shortwave and radio performance–the negatives outnumber the positives.

Pros:

  • Audio from built in speaker is superb for size (see con)
  • Sturdy, smooth plastic body (see con)
  • Perfect small size for travel
  • Strong FM radio performance
  • Ability to record either via built-in microphone or directly from radio (see cons)
  • One-button recording from any radio band
  • Crisp, easy to read backlit display
  • MP3 playback and functionality
  • Simple interface via supplied USB cable to both charge the radio and add/maintain recordings and MP3s
  • MW frequency steps can be adjusted between 9/10 kHz
  • Up to 32 GB of additional storage via micro SD card
  • Built-in microphone recordings of voice notes are excellent

Cons:

  • DE1129 plastic body lacks a back-stand and telescopic antenna cannot rotate
  • Shortwave performance is mediocre, AGC can’t handle weak signals and QSB
  • Mediumwave performance is poor, AGC flounders on weak signals, and most of the MW band is plagued with a ticking noise
  • Bandwidth cannot be changed and is too wide for crowded SW broadcast conditions
  • No direct frequency entry (though Degen plans to add this very soon!)
  • No complete (stand-alone) charging adapter; USB cable only, to plug into PC or wall-mounted USB charger
  • Tuning rate is fixed on SW at 5 kHz and not adaptive if you turn the dial faster
  • 4 or 5 second delay when turning radio on
  • Additional delays in response when changing frequency, mode, band and starting/ending a recording
  • Protective tuning knob strap prevents thumb tuning
  • While recording from radio, the volume level will spike loudly and cannot be changed or muted regardless if using built-in speaker or headphones
  • Recorded radio audio suffers from compression and is significantly degraded from the original broadcast–less noticeable on SW and MW/AM
  • No external antenna jack
  • No English manual (at time of this review, though I imagine this will be forthcoming)
  • In the current firmware version, the radio mode is displayed as “FM Radio” in the menu selection, though this mode covers all radio bands
  • There are no backlight options or modes that I could find–if you touch a control or move the frequency, the display will remain backlit for only about 10 seconds (please comment if you know how to change this)

Summary

I really should have started this review with the following disclaimer: it is possible that there is functionality to this radio, and adjustments that can be made to it, that I have yet to discover.  To my knowledge, I have toured and tried every menu option and explored every possibility with the radio’s settings.  However, since this is an early production unit and all of the instructions are in Chinese, I could easily have missed something. Future firmware updates and the forthcoming numeric keypad could also change my opinion of the DE1129.

With that said, I can freely comment on my experience:

If you are looking for a very compact radio with good FM reception, with MP3 recording and playback, with a compact form factor and a wonderful built-in speaker, you may want to consider the Degen DE1129 in your search.

If you are seeking a good shortwave or mediumwave radio, however, I would look elsewhere.

Overall, I feel like the DE1129 has much room for improvement, and I hope Degen is listening and will make firmware upgrades to quickly address some of my criticisms above. It’s as if  the DE1129 was built around the MP3/FM functionality and shortwave/mediumwave was simply an add-on, a bonus feature. I would never use the DE1129 for shortwave DXing, and certainly not for mediumwave DXing. The fact that the radio receives noise from its CPU–especially the ticking sound on MW–makes me believe that it was not thoroughly tested before production.

The Degen DE1129 & box (Click to enlarge)

For the price point (currently $100 US, shipped from the manufacturer), I simply expect better performance. In my tests, the Grundig G3 and Tecsun PL-380 outperformed the DE1129 in every respect on shortwave and mediumwave.

TecsunRadio.com provided a sample unit for this review and I paid for DHL shipping.  I can say that I’ve been very pleased with customer service at TecsunRadio.com. Since they are in a different time zone, and English is their second language, communication was slow, but they answered my many questions.

To my knowledge, the Degen DE1129 is only available from TecsunRadio.com and can be purchased for $80 US plus $20 shipping internationally.

Ragnar’s review of the RFspace NetSDR

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The RFspace NetSDR wideband receiver

The RFspace NetSDR wideband receiver

A few weeks ago, I posted a link to Universal Radio’s used receiver page which featured a used RFspace NetSDR. Ragnar Daneskjold (of Pirates Week fame) jumped on the deal. Ragnar had been contemplating an SDR purchase for some time, and the NetSDR fit the bill.

Now that Ragnar has had some time to play with the NetSDR, he posted some of his impressions which began with this statement:

A few weeks ago I purchased a Net SDR from RF Space. I have to say that I love it. Its just a black box that resides in my basement but it has revitalized shortwave listening for me.

Ragnar evaluates the NetSDR using three different SDR applications: CuteSDR, sdrDX and SDR-Radio.

Click here to read his full post which also includes instructions on how to listen to his Internet-connected NetSDR.

Thanks for sharing your thoughts on the NetSDR, Ragnar!

A review of the ShouYu SY-X5 DSP shortwave radio

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The Shouyu SY-X5 mechanically-tuned, DSP portable radio. (Click to enlarge)

The Shouyu SY-X5 mechanically-tuned, DSP portable radio. (Click to enlarge)

The ShouYu SY-X5 shortwave radio came to my attention only a few weeks ago. It is yet one more mechanically-tuned, DSP based, portable shortwave/AM/FM radio. I have reviewed several other models based on the same DSP chipset: the Silicon Labs SI4844–see my reviews of the Degen DE321, Degen DE32, and the Kichbo KK-9803. I also recently reviewed the Tecsun R-2010D, though it is based on a slightly newer, though similar, SiLabs DSP chipset.

What makes the ShouYu SY-X5 stand out is the fact that it can be powered by either a rechargeable slim battery pack (found in the DE32) or three standard AA batteries.  It also has a built-in MP3 player that uses a standard microSD card for media storage. Why are these features of particular note for me?  I have been searching for a shortwave radio/mp3 player for use by my charitable non-profit, Ears To Our World. ETOW works in parts of the world where people lack mains power as well as access to the Internet (or else simply can’t afford Internet service). In such settings, radio allows teachers and school children to hear up-to-date international news via shortwave, and through pre-recorded educational material, they can play (and replay) MP3 content as needed.

Therefore, I immediately ordered an SY-X5 for review here, hoping to donate it for use in the field care of Ears To Our World.

First impressions

Degen DE321 (left) Shouyu SY-X5 (right)

Degen DE321 (left) Shouyu SY-X5 (right)

The ShouYu SY-X5 is a small radio, almost exactly the same size as the very portable Grundig G6 and only slightly larger than the Degen DE321 (see left). It feels sturdy and even slightly heavy in your hand (no doubt, due to the number of batteries it holds). The antenna is rotatable and feels more robust than other radios in its price class.

The SY-X5 has a back stand that likewise feels sturdy enough. Note: to open the battery compartment, you must lift up the back stand.

The overall quality is better than one might expect for $27 (US), with one notable exception: the printed frequency display behind the analog dial on my unit is positioned slightly off-center and not level, making needle position on the dial, well, frankly ambiguous.

Audio

Without a doubt, the greatest aspect of the SY-X5 is the audio delivered from the built-in speaker. It is exceptional for this size radio, full and with impressive bass characteristics. It very much reminds me of the Melson M7 (not yet reviewed here) and the Degen DE1129.

(Click to enlarge)

(Click to enlarge)

Performance

I’ve reviewed enough of these mechanically-tuned DSP-based radios now that I’m beginning to note performance commonalities that can only be attributed to the design of the DSP chipset itself (regardless of how hey are implemented in each model of radio).

At risk of sounding like a broken record, this radio’s sensitivity, selectivity and AGC performance is nearly identical to the Degen DE321 on every band; here’s a summary:

  • Shortwave
    • sensitivity is mediocre–expect to hear all strong stations
    • AGC circuit has difficulty coping with weak station and fading
    • selectivity is mediocre
  • Medium Wave (AM)
    • strong daytime stations sound great
    • the SY-X5′s AGC circuit struggles with night time conditions, even with some strong stations
    • selectivity is mediocre
  • FM
    • FM performance is quite good
    • Both selectivity and sensitivity are great for the price–in this case, $27 US
(Click to enlarge)

(Click to enlarge)

Between the two FM bands, the SY-X5 should easily accommodate world-wide FM broadcasts (even Russia). The two AM (medium wave) bands are almost identical in frequency allocation, but have been set up so that one is on 9 kHz spacing and the other on the 10 kHz spacing typically used here in North America (nice touch).

Tuning

While the “feel” of the tuning wheel on the right side of the radio seems smooth, in reality it is not. The tension or actual mechanics behind the analog tuner are problematic; I find that upon tuning in even a strong station, when I let go of the tuning wheel, it immediately moves off-frequency. It’s most annoying. Over the course of several days of use, it doesn’t seem that the mechanism has broken in at all as I had hoped. This is perhaps the biggest negative of the ShouYu SY-X5; it is just not easy to accurately tune it.

(Click to enlarge)

(Click to enlarge)

MP3 Player

While I haven’t spent hours using the MP3 player, I find that it’s simple, yet quite effective. Most notably, it lacks fast-forward and reverse controls, though it does have buttons for ten-second skips both in the forward and reverse directions. Of course, you can pause, stop and skip to next/previous MP3 files.

The SY-X5 has a dedicated MP3 player red LED display; it is very bright–almost too bright, in fact, for low light conditions–and quite simple, offering only basic functions (no alpha-numeric tags, for example). Unfortunately, I find that the LED display does inject a little noise into the audio, but it’s nothing that would deter me from using it with the built-in speaker.

(Click to enlarge)

(Click to enlarge)

Summary

Every radio has positive and negative attributes; below are the pros and cons I noted from the moment I unpacked the SY-X5:

Pros:

  • Audio from internal speaker excellent for size
  • Integrated digital audio player
    • Uses standard Micro SD card for storage
    • Very bright red LED display (see con)
    • Dedicated, tactile buttons for basic MP3 functions
  • Multiple power sources
    • Internal rechargeable slim battery pack
    • Standard AA batteries
    • Charged/powered via standard mini USB cable
  • Relatively sturdy construction
  • Good FM sensitivity
  • Tuning indicator light
  • Inexpensive
(Click to enlarge)

(Click to enlarge)

Cons:

  • “Sticky” tuning wheel/dial results in immediate and annoying digital “drift” off-frequency
  • Sloppy selectivity (typical of this class of mechanically-tuned DSP radios)
  • MP3 player’s LED display almost too bright for low light settings; the LED does inject some slight noise into the headphone amp chain
  • Shortwave and medium wave sensitivity is mediocre, typical of other SiLabs SI484X radios
  • MP3 capabilities are only as a player, the SY-X5 cannot record in any capacity
  • Analog dial is small enough to make tuning accurately quite difficult
  • The dial’s printed frequency display in my unit is positioned off-center and tilted, resulting in ambiguous needle alignment

Conclusion

The ShouYu SU-X5 is very similar, performance-wise, to the Degen DE321. Out of all of the mechanically-tuned DSP portables reviewed thus far, the SY-X5 may have the best audio fidelity via its built-in speaker (save the Tecsun R-2010D). Also, like other similarly sized and priced models in this family, the SY-X5 has tuning issues; in its case, a tuning wheel that will not stay on frequency without practice.

(Click to enlarge)

(Click to enlarge)

I’ve decided to take my SY-X5, on behalf of Ears To Our World, to inner Belize City in the near future. I’m going to offer this radio–together with a microSD card packed with VOA Special English programming (and a host of other English language educational materials, music and stories)–to a visually-impaired, economically-disadvantaged school child who will hopefully give this basic little radio lots of use, and perhaps even maximize its potential. While the SY-X5 has shortcomings, for this particular use–serving an individual who will not rely primarily on sight, but on tactile response, to operate it–I think it may serve its purpose. Perhaps this will be the best litmus test for the SY-X5′s utility and longevity:  I may post an update when I receive feedback in approximately one year, as to whether this radio has required repair, replacement, or has offered (as I sincerely hope!) some measure of benefit to the child-owner.

For the radio hobbyist, I would encourage you to skip the ShouYu S-X5 and, instead, invest in a Tecsun PL-380, PL-390, PL-398BT, Degen DE1102, DE1103, or the Tecsun PL-600. Though all are pricier, each is under $100 US, and will actually provide a lot of performance for the price. The SY-X5 and other mechanically-tuned DSP radios seem only to offer mediocre performance and a low price.
Click here to search for the Shouyu SY-X5 on eBay.

Review of the Elecraft KX3: world-class transceiver, superb shortwave receiver

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I originally wrote this review for Monitoring Times Magazine, May 2013 issue (pages 56-57). The review that follows has been expanded and includes updates.

The Elecraft KX3 Transceiver (Click to enlarge)

The Elecraft KX3 Transceiver (Click to enlarge)

You may have noticed that in the past few years, while more and more software defined radios (SDRs) are appearing on the market, fewer and fewer traditional tabletop shortwave receivers are being introduced. Most of the receivers in production, meanwhile, are quite mature, having been in production for years. For those of us who still have an appreciation for the traditional front panel, tuning knob, and portability of an all-in-one tabletop receiver, perhaps we should look to the active ham radio transceiver market.

Introducing the Elecraft KX3

Besides being an avid SWLer (ShortWave Listener, for the newbies out there), I’m also a ham radio operator (callsign: K4SWL). But if you’re not a ham, you may not be familiar with the innovative, US-based radio designer and manufacturer, Elecraft. First of all, note that “US-based” adjective: this is an increasingly rare phenomenon in the world of radio production, and it deserves a word of praise up front. Elecraft started life as a kit manufacturer, focusing on QRP ham-band-only radio transceivers that were effective, affordable, and maintained a very high level of performance. Their K1, KX1 and K2 transceivers are legendary, and I’ve had the good fortune to own them all at some point along the way. Their K3, introduced in 2008, became a benchmark transceiver and still tops the charts in performance; it’s truly a choice DXpeditioner’s radio.

In 2011, Elecraft introduced the KX3–a portable SDR transceiver with a full-featured knob-and-button user interface that doesn’t require connection to a computer to operate. At the Dayton Hamvention, the KX3 instantly drew crowds, as it was unlike any other transceiver on the market. I was there, and like others in the crowds around the Elecraft booth, I was eager to try out this full-featured transceiver, especially upon learning that even the basic, no-options model has a general coverage receiver. A ham transceiver with “general coverage,” incidentally, means that its receiver is not limited to the ham bands only; these receivers typically receive between 100 kHz and 30 MHz (i.e., the full shortwave radio spectrum). That morning at the Hamvention, I quickly made my way to one of Elecraft’s owners, Wayne Burdick, to ask him,“Would the KX3 make for a good shortwave radio receiver?” Wayne’s prompt response: “Yes.”

That was enough for me: more than ever, I simply couldn’t wait to get within reach of a KX3. Why? I love to travel and take radio along, but I’ve always had to haul separate transceivers and receivers for my separate-but-related hobbies: 1) ham radio and 2) SWLing. Perhaps the KX3 would suit both purposes? I was hopeful. If this was true, with a KX3, I could have a full-featured QRP transceiver and a shortwave receiver in one…and a portable one at that. Ideal!

I just had to get my hands on one to find out.

(Click to enlarge)

(Click to enlarge)

A closer look

Though the KX3 was introduced in the summer of 2011, it didn’t start shipping until a few months later, and there was a backlog of orders for it. Fortunately, my good buddy, Dave Anderson (K4SV), was among the first purchasers of the KX3, and he was generous enough (and trusted me enough!) to let me borrow it.

At first glance, the KX3 resembles just the faceplate of a tabletop radio: it has a large tuning knob, wide, clear amber backlit display, and a traditional set of function buttons and multi-function knobs…but not much else. Or so it appears, as there’s no bulky chassis. Connections for microphones, DC power, headphones, IQ out, key and PC interface are located on the left side panel of the radio, while the RF connection (a female BNC) is on the right side panel. The KX3 has built-in folding feet, quite sturdy, that allow the radio to be tilted at a comfortable angle for tabletop operation.

To best evaluate the KX3, I’ll first discuss some of the features that would interest a ham radio operator, then focus on those best suited to the SWLer.

There is a hidden keypad for direct frequency entry (notice the numbers printed next to the multi-function knobs and buttons?)

There is a hidden keypad for direct frequency entry (notice the numbers printed next to the multi-function knobs and buttons?)

Everything for the Ham

If you’re a ham, you’ll love the feature set on the KX3. It must be one of the most comprehensive set on any radio I’ve ever used. At a bare-bones level, meaning without adding any options, the basic KX3 is truly an all-in-one QRP transceiver.

Of course, it will function on any mode: USB, LSB, CW, data, AM and FM. The output power is adjustable from 0 to 10 Watts. You can easily adjust the DSP filters, AF, RF, passband, and notch all from dedicated buttons and knobs. It even has a memory keyers for both CW and voice.

You say you prefer digital modes? Not only will the KX3 natively decode RTTY and PSK31 and display the scrolling text on the display, but you can also send RTTY and PSK31 without a PC. How? Simply set the appropriate data mode and use your key to tap out your message in CW. Though you will hear the CW side tone, the KX3 will transform your code into RTTY or PSK-31, and send. Hypothetically, armed with only a KX3, you could run a RTTY contest from the field with no computer. Remarkable.

The variable DSP filtering is most impressive and the KX3’s ability to block adjacent signals is benchmarked. Indeed, if you look at Sherwood Engineering’s receiver test data rankings (http://www.sherweng.com/table.html), which are sorted by third-order dynamic range (narrow spacing), the KX3 is second only to the Hilberling PT-8000A, an $18,000 transceiver.

With the installation of the $170 optional internal automatic antenna tuner (the KXAT3), you will be able to tune most any wire antenna on the go, with no need to carry an external ATU.

In short, for the ham, the KX3 offers a cornucopia of features, too numerous to list here; but I can at least tell you that I discover something new on this radio almost every day and continue to be amazed by the features on this transceiver, especially considering that it costs only $1000 ($900 in no-solder modular kit form).

The Elecraft KX3 is built for travel and portability--here we compare its size with the Grundig G3

The Elecraft KX3 is built for travel and portability–here we compare its size with the Grundig G3

For the SWLer

We’ve talked about the KX3 as a ham radio transceiver, but how does it stack up if your primary interest is to just sit back and listen to broadcasts? Short answer: Very, very well.

The KX3 is loaded with features that would please even the most discriminating DXer.

First, on the faceplate, the KX3 has a multi-function knob that controls both the AF and RF gains. It’s very simple to use, even though I’m not a fan of switching between the AF/RF gain controls on the same knob. AF gain is what most of us refer to as a volume control and many dedicated shortwave receivers lack an RF gain control even though it’s a vital tool for broadcast listening in noisy conditions. By default, the KX3 RF gain is set to zero; turning the RF pot counter-clockwise will decrease RF gain.

Grundig G3 (left), Elecraft KX3 (right)

Grundig G3 (left), Elecraft KX3 (right)

The KX3 also has three different preamp settings, which are useful for amplifying weak stations, as well as an attenuator for local or strong broadcasters. The KX3 has passband and notch filtering, and an auto-notch function that effectively deals with heterodynes from nearby carriers. The KX3 also has DSP noise-reduction (NR) for noisy band conditions (or to help a signal “pop” out from the noise) and noise blanking (NB) for local RFI.

Many automatic gain control (AGC) parameters are adjustable, too, so they can be tweaked for AM fading and weak-signal DXing. The fact is, the KX3 has more built-in receiver controls than the dedicated tabletop shortwave receivers I’ve owned.

Audio

Left side panel of the Elecraft KX3 (click to enlarge)

Left side panel of the Elecraft KX3 (click to enlarge)

To be clear, however, there is one negative in the architecture of the KX3 when viewed through the eyes of an SWLer. The KX3 is designed around the amateur radio operator and AM bandwidth is narrower than you will find on most dedicated tabletop shortwave receivers–indeed, a commonality on any general coverage ham transceiver. The KX3’s AM bandwidth can only be widened to 4.2 kHz–a figure that almost made me dismiss this radio’s SWLing abilities out of hand. I’m glad I didn’t let that spec stop me, though: I had read many a favorable comment from KX3 owners who used the radio to listen to the broadcast bands. Their comments on the audio were very positive, and for good reason.

What the KX3 lacks in wide bandwidth is made up for by the 32-bit floating point DSP architecture. I’m not sure how, but the KX3’s audio fidelity “sounds” much wider than 4.2 kHz. Indeed, I still have a difficult time believing that the filter is not closer to 7-8 kHz in width. When using headphones or amplified speakers, the bass response rivals some of my tube receivers. There are even adjustable 8-band equalizer settings for audio to improve this even further.

In addition, Elecraft has unique audio effects available in the audio effects menu. One I’ve found very valuable in broadcast listening is called “delay,” a stereo simulation effect that broadens the mono sound in such a way that the audio sounds even richer.

Memories, scanning and tuning

The KX3 has 100 general-purpose VFO A/B memories with optional alpha numeric labels. It also supports channel-hopping or scanning within any number of labeled memory groups. Auto scan is simple and works in both muted and (my favorite) non-muted, or continuous, modes.

The KX3 can also use the “K3 Memory” application from Elecraft’s K3 transceiver, which allows for longer labels and the instant selection of desired memories from a PC. The “K3 memory” application is a free software download on Elecraft’s website.

The tuning knob on the KX3 is substantial and of good quality. It’s only slightly smaller than the tuning knob on my Alinco DX-R8T, so it’s a substantial knob, which is helpful to big (or buttery) fingers. The drag can be easily adjusted with a supplied hex wrench. The tuning rate can be adjusted to .5 kHz increments, allowing you to quickly tune through the band. The small multi-function knob next to the main tuning knob can also be set for a 1 kHz rate.

At first glance, you might not realize that the KX3 has a direct frequency-entry keypad. Check out the photo, however [MAKE REFERENCE TO POSITION ON PAGE]. The buttons and multi-function knobs in the lower left quadrant of the KX3 double as number pad, decimal point, and an “enter” button for a keypad. I thought this a bit odd at first, but now find I use this all the time.

Installing the optional ATU is very simple and requires no special tools or soldering

Installing the optional ATU is very simple and requires no special tools or soldering

Optional ATU: Worth the Cost

As I mentioned earlier, the optional automatic antenna tuner, the KXAT3, makes a lot of sense for the ham who operates portable. If you are a licensed amateur radio operator, the ATU can be a powerful tool for matching random length, or multi-band antennas to your desired broadcast band by tuning to a nearby ham band frequency. The L and C parameters of the tuner can be manually adjusted to optimize without transmitting. The user can select one of 8 L’s or one of 8 C’s parameters in the ATU MD menu entry. When an L is selected, C is set to 0, and vice-versa. However, it is not presently possible to select combinations of L and C to achieve a closer resonance. Still, selecting an L or C value in this way will provide a useful increase in gain.

In addition, if you like medium wave (MW) DXing, the ATU comes with MW (AM broadcast band) filtering that tracks the VFO, somewhat improving image rejection between 300-1,000 kHz. I have tested the KX3 on medium wave both with and without the ATU installed and find that it certainly improves rejection.

To be clear though, sensitivity decreases as you tune below 1,500 kHz. Elecraft informed me that it was necessary because the KX3 uses PIN diodes in its T/R switch, and the signal must be high-pass filtered to avoid IP2 problems with the diodes. When you tune through the 300-1200 kHz range (or so) you will certainly notice the loss of sensitivity. Elecraft also noted that selectivity in the AM broadcast band was not a major design criteria, so in this band the 160 meter low pass filter is used. This is not ideal from a harmonic rejection standpoint, and there will be some 3rd and 5th-harmonic images from strong stations. Adding the ATU helps with this. However, adding the ATU doesn’t generally improve sensitivity in this range.

The ATU is very easy to install–almost “plug and play” (see photo).

Oh, yes–and it’s an SDR, too!

As if the KX3 didn’t do just about everything, it also has a quadrature down-sampling mixer compatible with PC-based SDR (software-defined radio) applications. This means, via a shielded stereo audio patch cable and a supplied USB control cable, you can connect the KX3 to your PC and use a freeware SDR application like HDSDR to turn your KX3 into a proper software-defined receiver.

SDR functionality is limited to receiver functionality, and depending on the bandwidth and sampling rate, will be dependent on the quality of your sound card. The true benefit is the ability to see a wide–48 kHz or more–chunk of spectrum.

Summary

Every radio has its pros and cons. When I begin a review of a radio, I take notes from the very beginning so that I don’t forget some of my initial impressions. Here is the list I formed over the time I’ve spent evaluating the KX3. Note that I created this list with the shortwave listener in mind, not necessarily the ham radio operator.

I even had some success SWLing using an inexpensive whip antenna (attached via BNC).

I even had some success SWLing using an inexpensive whip antenna (attached via BNC).

Pros:

  • World class, benchmarked receiver performance powered by high-performance 32-bit floating-point DSP
  • Rich, full audio fidelity on AM despite limited bandwidth (see con)
  • AF and effective RF gain controls
  • Adjustable filters (no optional roofing filters needed for SWLing)
  • Superb sensitivity and selectivity; outperforming even my WinRadio Excalibur with weak signal DXing
  • Very low noise floor
  • Auto-notch, which helps eliminate annoying heterodynes, even in AM
  • Internal ATU option brings improved MW image rejection (see MW con) and hams have the ability to tune a random length antenna
  • Natively decode (170 Hz) 60-WPM RTTY and display it right on the KX3’s VFO B display, which is alphanumeric
  • Battery operation via 8 AA batteries
  • Lightweight
  • Dedicated headphone jack
  • For non-ham radio operators, the transceiver can be disabled and re-activated once you have a license with a simple hardware adjustment. No need to fear accidental transmission
  • For hams, or those who plan to become one, the KX3 is a QRP transceiver in the top of its class

Cons:

  • AM bandwidth limited to 4.2 kHz (see pro)
  • Hand mic connector is the less standard 3.5 mm audio plug
  • Built-in speaker is small with limited volume and fidelity–only intended as a back-up when headphones or external powered speakers are unavailable
  • AA batteries fit a bit tightly in internal holder and can present a challenge to remove
  • Medium wave reception is mediocre at best, but with the optional ATU, is improved though slightly better image rejection (see ATU pro)
  • Very slight audio whine (similar to a faint heterodyne sound) heard in some zero beat AM stations; may be fixed in future firmware update
  • No AM sync detector (AMS)

Did I buy one? Confession time

I must admit, I was appreciating my buddy Dave’s KX3 very much. Maybe too much…

I have three hobbies: shortwave radio listening, ham radio, and traveling. After using the KX3 for a few hours, I knew it would be my perfect companion. Not only is it a top-notch amateur radio transceiver, its also an excellent shortwave radio receiver. It’s portable, but also makes an excellent tabletop radio. It’s an all-in-one radio, but can also double as an SDR when connected to a PC.

So, is the KX3’s broadcast audio fidelity as good as a purpose-built broadcast receiver like the legendary Drake R8B? Not quite. But I would argue that its ability to receive weak signals would give even a Drake a run for its money. I have to admit, the KX3 receiver outperforms my Alinco DX-R8T in every respect. Even though the AM bandwidth is limited to 4.2 kHz, I think the audio also sounds better than my Alinco and any of my portable radios with wider bandwidth.

The Elecraft KX3 Transceiver (Click to enlarge)

My Elecraft KX3 Transceiver (Click to enlarge)

Needless to say, I bought one. It was only fair to Dave, who needed to discover for himself what his loaned-out rig could do.

The KX3 is a game changer for me. Though I’ve always carried portable transceivers in my travels, I’ve also had to carry a separate tabletop receiver and an SDR or portable radio for my SWLing. No more. Moreover, I like the broadcast audio on the KX3 well enough to record and archive shortwave broadcasts, which I frequently do for my blog, The SWLing Post and The Shortwave Radio Audio Archive. In my shack, I’m even considering purchasing Elecraft’s 100 watt amplifier and doing away with my 100 watt tabletop transceiver.

As for support? No worries there. I’ve been an Elecraft customer for years and I can tell you that they believe in and stand behind their products. I purchased with confidence.

I encourage you to try on the KX3 as well. It may very well be all the radio you’ll ever need.

Mechanically-tuned portable DSP radios: a shootout

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Three of the five contenders: The Degen DE32, Degen DE321 and Tecsun R-2010D (Click to enlarge)

Three of the five contenders: The Degen DE32, Degen DE321 and Tecsun R-2010D (Click to enlarge)

Following is my premiere shortwave radio column for the January 2014 issue of The Spectrum Monitor digital magazine.  It takes the form of a review–or “shoot-out,” if you will–of a few select mechanically-tuned DSP radios I’ve tested over the years.

While I’m a big fan of print publications, digital publications like TSM offer me flexibility that I can’t get in traditional print: namely, shorter time to publication (thus more up-to-date information) and especially, the ability to embed links and audio as I do here on The SWLing Post. In this case, I’m able to include audio clips which the reader can utilize to compare the radios firsthand (embedded here, as well).

Note: This being my first contribution to a brand new magazine, I thought it would be fitting to begin by explaining why I still believe in shortwave radio…I mean, how could I resist? I guess I’ll always be a shortwave evangelist at heart.

Hope you enjoy.


First:  why I still believe in shortwave

SP600Dial3While I’ve been blogging about shortwave for several years now, I simply can’t tell you how many times I’ve received an email asking doubtfully, “This seems like a fun hobby, but isn’t shortwave radio dead?”

My response?  No way!  Here’s why.

I once had the truly good fortune to be interviewed by Gareth Mitchell, host of the BBC World Service technology program Click. For once, I made a point of listening to this interview that featured me––always a bit embarrassing––but after all, this was the BBC World Service!

But Gareth’s lead-in to our segment about my shortwave radio-based charity, Ears To Our World (ETOW), truly surprised me:  our non-profit, he said, “distributes portable battery powered devices that can stream audio in real time, all via an intuitive touch interface.”

Wow…how true.  And since that interview, this is exactly how I see shortwave radio, too: not as a forgotten relic of the past century, but as a medium at home in the future with a unique, highly accessible, and yet global reach.  Shortwave radio, after all, requires no apps, no subscriptions, and no mobile phone or Internet connection to deliver information worldwide at the speed of light.

All you need––in short––is a radio.

Shortwave lives!

This column exists to prove to the doubtful that shortwave radio––indeed, radio in general––is not only alive and well, but loud and clear in urban as well as rural settings the world over.   Here, you’ll find in-depth articles that reflect the changing state of shortwave radio:  the technologies, the techniques, and the vast array of content currently available across the shortwave radio spectrum. Best yet, because SWLing (shortwave listening) is what you make of it, you can be part of it:  share your input, so that I can cover (and uncover) shortwave topics you wish to discuss.

So I begin this first column with a little comparison––a shootout––between five newly-popular analog DSP radios.  Let’s find out who’s left standing.

The contenders

We’ll be pitting five models against each other here: the Degen DE321, the Degen DE32, the Tecsun R-2010D, the Kchibo KK9803 and the ShouYu SY-X5. With the exception of the ShouYu SY-X5, all of these manufacturers have in the past produced at least one portable with truly notable performance (the Degen DE1102, 1103, Kchibo D96L and an array of Tecsuns, including the PL 310, 380, 390, 600 and 660).

Moreover––so that you can hear the difference for yourself!––I’ve included linked audio clips for each model. They were all tuned to the same frequency, same broadcast and within seconds of one another.

But first, what is a DSP radio? And why do we need them?

The Silicon Labs DSP chip found in many of these radios.

The Silicon Labs DSP chip found in many of these radios.

Mechanically-tuned DSP

Radio is no longer just your granddad’s medium.  Several years ago, the digital signal processing chip manufacturer, Silicon Labs (SiLabs), altered the entire radio landscape with one little chip. Indeed, most new digital shortwave/AM/FM radios on the market use a SiLabs (or other manufacturer’s) DSP chip as the centerpiece of their receiver architecture.

Using a DSP chip in a fully digital radio makes sense: after all, you have a digital display, digital buttons, and digital encoder. But using a digital chip with a traditional analog display––a mechanically-tuned DSP radio––does that make sense?

SiLabs and a growing number of radio manufacturers and retailers believe the answer is a resounding “yes.” In truth, there are concrete benefits to making this addition; among them:

  • Decreasing production cost of radios by as much as 80%
  • Decreasing R&D costs of new radios dramatically
  • Digital signal processing with the simplicity of analog radio design
  • Reduced power consumption when compared with digital display radios
  • An avenue to make radios more affordable––especially to listeners living in poverty, such as those in developing world settings, who make up a large subgroup of listeners

When I first learned about the implementation of a DSP chip with a mechanically-tuned radio in 2010, I felt like it might be “the” way to make quality receiver performance available and accessible to many.  Now, four years later, several manufacturers have produced mechanically-tuned DSP shortwave radios.  All are available from sellers at a price of under $40 USD. Not bad…

Common review points for mechanically-tuned DSP radios

I’ve now reviewed enough mechanically-tuned DSP-based radios that I’m beginning to note performance commonalities that can only be attributed to the design of the DSP chipset itself, regardless of how these are implemented in each model. So, before the shooting starts, let’s take a quick look at some common review points of the contenders.

Tuning: not quite an analog radio…

I’ve got to begin with the most obvious common review point: namely, tuning.

For those of us accustomed to analog tuning, the DSP/analog combination is, well, completely different and a little quirky. Tuning a traditional analog radio is a fluid process which allows for a certain amount of play; you need not be precisely on a frequency to hear a station, and often you hear a station fade as another pops into the band pass. But when tuning analog DSP, you hear stations and static pass by in comparatively coarse 5 kHz chunks. Especially in radios with tiny analog frequency dials, it makes tuning feel somewhat “sticky” or finicky, and ironically, rather imprecise. You feel like you’re skipping over stations while band-scanning.  And for those accustomed to digital tuning, instead of using buttons to tune in these 5 kHz increments, you’re using a tuning wheel, with no customary “step” response.  Not what you would expect from either digital or analog radio.

But of course, you can locate your station with this method.  It takes a little practice––and a measure of patience––but you’ll adjust to this different method of tuning.  Note that much of this awkwardness may disappear if SiLabs produces a chip with more precise tuning increments, such as 1 kHz steps with decreased muting.

Automatic Gain Control

In all the models I’ve tested so far, the Auto Gain Control (AGC) is a little too overactive when listening to weak AM/SW stations. This results in a “pumping” sound and serious listening fatigue when set on weaker stations. However, on strong stations, all models perform quite well.

Conformity

Since all of these radios are based on the same chip family from SiLabs, you can expect eight shortwave bands: two FM bands, one AM (medium wave) band, and eight shortwave bands. The frequency ranges available to the manufacturer in all bands are identical.

FM

FM performance on each of these radios is above average, and the coverage quite wide––from 64 MHz to 108 MHZ in two FM bands. If you like listening to FM radio, you’ll be pleased with any of these inexpensive models.

And now for some action!

Now, we’ll pit these five radios against each other in an listener’s challenge that will leave the losers in the dust…and the winners clear.

Degen-DE321

The Degen DE321 – Current retail:  $21.00 USD

The DE321 was the first analog DSP shortwave radio on the market. The DE321 is small, slim, über-simple, and fits nicely in the hand. The analog tuning dial takes up more than half of the front face of the radio––a good thing, as the larger the dial, the easier the tuning. Performance-wise, the DE321 holds its own in this crowd; it’s quite reasonable in both sensitivity and selectivity. The DE321 is the most bare-bones radio among the five described here.

Degen-DE32

The Degen DE32 – Current retail: $27.00 USD

The DE32 is the smallest radio of the five. Unlike the DE321, the DE32 is not “just” a radio; it also sports a simple MP3 audio player and a small white LED flashlight. The DE32 has a small built-in speaker which delivers tinny and rather cheap audio, but is okay for a single listener, and fine for spoken-word broadcasts. Audio fidelity is greatly improved with headphones. Performance-wise, the DE321 is slightly better than the DE32 on shortwave.

Tecsun-R2010D

The Tecsun R-2010D – Current retail: $39.00 USD

When I first held the R-2010D, I initially assumed I had found the holy grail among analog/DSP radios:  while the R-2010D is the largest of the five radios, measuring nearly equivalent to my Sony ICF-SW7600GR (not a pocket-sized portable like the others) it nonetheless has a beautiful large analog display (a major plus!), an amply-sized speaker for great portable audio, and a fluid tuning mechanism. To top it off, the R-2010D has a small digital frequency display so that you can verify your frequency. The R-2010D’s AGC circuit handles strong stations well, but clips on weak stations. But the promising R-2010D has one major flaw: terrible selectivity. Indeed, the selectivity is so sloppy, that you will not be able to delineate two strong signals spaced 10 kHz apart from each other.

ShouYu SY-X5

The ShouYu SY-X5 – Current retail:  $27.00 USD

The SY-X5 surprised me: what makes this model stand out is the fact that it can be powered by either a rechargeable slim battery pack (found in the DE32) or three standard AA batteries.  It also has a built-in MP3 player that, like the Degen DE32, uses a standard microSD card for media storage. Unlike the DE32, the SY-X5 has a bright red LED display that helps in navigating MP3 files. The SY-X5 also has surprisingly good audio from its built-in speaker, rivaling the much larger Tecsun R-2010D. The negative here? Though the SY-X5 has a fluid tuning mechanism, it is prone to drifting when trying to adjust the analog tuning needle to frequency.

IMG_0823The Kchibo KK9803 – Current retail:  $16.00 USD

When I first wrote this review, I didn’t even include the KK9803. Why? Because, frankly, it’s one of the worst performing radios I’ve ever owned, and I would strongly discourage you from even considering it. My primary criticism of this radio is that the tuning is barely functional:  the shortwave band segments are far too close to one another on the dial, hence the digital tuning steps are too narrowly-spaced to offer any sort of tuning accuracy whatsoever. Barely moving the tuning wheel, one may pass over even a strong station…undetectably. The only hint of the station’s existence may be an occasional quick blip or audio buzz. I must confess that the experience of band-scanning (tuning) this radio offers is the worst I’ve ever known in any radio. Don’t buy it. In our shootout, it’s bitten the dust before it even aims, because let’s face it:  this radio just can’t.

Audio comparisons

Click on each radio model to hear a short comparison audio clips. Note that I added an audio sample of the Tecsun PL-660 to the weak signal DX examples as a benchmark.

The Tecsun R-2010D (left) has the best audio from its large internal speaker, the Degen DE32, on the other hand, produces "tinny" audio via its speaker.

The Tecsun R-2010D (left) produces excellent audio from its large internal speaker. The Degen DE32 (right) produces “tinny” audio via its tiny built in speaker.

Local AM Comparison (1350 AM)
Degen DE321
Degen DE32
ShouYu SY-X5
Tecsun R-2010D

Weak Signal Shortwave Comparison (KBS 9,805 kHz)
Degen DE321
Degen DE32
ShouYu SY-X5
Tecsun R-2010D

Tecsun PL-660 (AM and Sync)

Strong Signal Shortwave Comparison (WINB 9,265 kHz)

Degen DE321
Degen DE32
ShouYu SY-X5
Tecsun R-2010D

The Winners

All of these radios share similar qualities.  After all, they’re brothers of a sort, built around the same family of DSP chips. If you’ve read the summaries above, then you won’t be disappointed by any of these that follow–especially at this modest price point. Still, I reach for different radios based on their strengths, and to help you choose, here’s a “best of” list:

Most versatile: ShouYu SY-X5

Best Audio: Tecsun R-2010D and ShouYu SY-X5

Best sensitivity: Tecsun R-2010D

Best value: Degen DE321

Best overall?

The ShouYu SY-X5

The ShouYu SY-X5

If I had to choose just one of these radios, it might just be the ShouYu SY-X5. It offers the most value and versatility for the performance. I think its audio is brilliant for a pocket radio, and I love the fact it has an LED display to help me navigate through the MP3 files loaded on my microSD card. However, as with any of these low-cost contenders, don’t expect to try any weak-signal DXing with the SY-X5.

By the way, if the Tecsun R-2010D simply had better selectivity and weak signal gain control, it would win this contest, hands down. In fact, I actually sent feedback to Tecsun engineering regarding the R-2010D selectivity shortcoming in the hope that they’ll fix this problem in future production runs.  You might do the same.

In conclusion, mechanically-tuned DSP portables may not pack DXer-grade performance, but they are priced so that everyone can afford to experiment. And for your buck, that’s pretty good radio bang!


This article was previously published in The Spectrum Monitor.


Resources

Click on the radio model to read full reviews of each radio on the SWLing Post–I’ve also provided links to eBay:

Mega Review: the Tecsun PL-880, PL-660, Sangean ATS-909X, and Sony ICF-SW7600GR go head-to-head

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This article, which extensively reviews–and compares–the Tecsun PL-880, PL-660, the Sangean ATS-909X, and the Sony ICF-SW7600GR, originally appeared in the June 2014 issue of The Spectrum Monitor Magazine. Without a doubt, it’s my longest and most comprehensive review to date.


AllFourRadios

Summer:  time for travel–and for portable shortwave DXing. As I mentioned in the March TSM issue, I love combining travel with shortwave radio listening. But what radio should I pack?

This time of year, on the SWLing Post, I receive an increase in the number of queries asking some variation of the following, “What is the best, full-featured, portable shortwave radio on the market?” Oftentime it’s an upcoming trip, or just some time off work, that prompts the question, but without a doubt, this is the most-often-asked question from my readers. Typically, the reader has several models in mind and is curious how they compare. And since a good portable radio costs between $100 – $230 US, it’s not an impulse purchase decision for most of us.

In this month’s column, I hope to answer this question as thoroughly as possible so you can make an informed purchase decision that’s right for you. All four radios I mention in this article are what I would call “flagship portables” (generally, these are the best portables from any particular manufacturer). These were recently featured in a highly-energized reader survey on the SWLing Post, and are as follows: the Tecsun PL-660, the Tecsun PL-880, the Sony ICF-SW7600GR, and the Sangean ATS-909X.

AllFourRadiosInLine

The price tags for these radios fluctuate, but all are generally available between $100-$230 US, and are actively in production right now.

Moreover, all these radios have a similar form factor: they are portable enough to be operated handheld, sport a direct-frequency entry keypad, a dedicated external antenna jack, and a generous backlit display. All of them also have SSB, and all but one have selectable sideband synchronous detection.

The competitors

With the exception of the Sangean ATS-909X–on loan from a friend for the purposes of this review–I have easily spent 40+ hours of listening time with each of these radios. I know their individual characteristics quite well and have used them in a variety of situations.

In case you’re not familiar with each of the contenders, a brief summary of each radio follows with an overview of the features that make it unique.

Sangean ATS-909X

ATS-909X

If there was an award for the best-looking radio, I think the ATS-909X would win. The 909X designers put a great deal of thought behind the design and ergonomics of the 909X; for instance, there are two indentations on the back of the radio which allow it to fit nicely in your hands.  The 909X sports an internal speaker that produces excellent audio fidelity with a crisp response and even some distinct bass notes, especially notable if listening to an FM station. Of all of the radios listed here, the 909X has the the best variable receiver gain, tone control, largest display, and is the only radio with RDS (Radio Data System).

909X-Grip

While I like the position of the tuning wheel on the front of the radio, which is ideal for tuning with your thumb and reminiscent of the ICF-SW55, I don’t like the indents you feel as you tune. If you’re a listener that takes advantage of radio memory, the ATS-909X has a very appealing feature: alpha-numeric memory tags. When you store a Radio Australia frequency to memory, your 909X can display the full station name in large, easy-to-read characters.

909Xdisplay

There is one omission from the 909X, though, that I find a bit surprising: it has no synchronous detection. While I don’t use a sync detector all of the time, it does come in handy when fading (QSB) and adjacent signal interference (if the sideband is selectable) are present.  For a radio that costs over $210 US, on average–the priciest on this list, by a long shot–I feel like sync should have been a given.

Sony ICF-SW7600GR

Sony7600GR

The Sony ICF-SW7600GR comes from a series of “7600” portables that date back to 1977. Though the ’7600GR has all of the modern features one would expect for a radio in its price class, it’s a bare-bones receiver in this particular crowd. It lacks the advance memory functions of the PL-880, PL-660 and, especially, the 909X. The display is smaller and more basic, although it does provide the most vital information.

I have traveled extensively with the ’7600GR, however, as it has rock-solid, reliable performance; it’s my work horse and go-to radio for field recordings because I find its AGC and sync detector remain among the best in this class of radio. It also has a dedicated, stable line-out jack. Important controls are all accessible, and I can easily engage the key lock without fear of accidentally pressing the wrong button during the recording.

SonyKeypad

My main gripe about the ’7600GR, however, is its lack of a tuning knob and overall poor ergonomics.  My personal preference is to use a tuning knob for band-scanning, as pressing buttons just doesn’t give the same sense of responsiveness.  For casual tuning and band-scanning, I leave the ’7600GR in its case.  Nor is this radio intuitive–indeed, to learn all but the most obvious functions of the ’7600GR, you’ll need to reference the owner’s manual. Audio from the ’7600’s internal speaker is average/unremarkable.

Still, my Sony ’7600GR’s solidity makes it a friend I would never part with.  The real test? If it was ever lost or broken, I would promptly repair or replace this radio.

Tecsun PL-660

PL-660

Though I’m often an early adopter of new shortwave portables, I wasn’t for the Tecsun PL-660. When it came out, I figured it would be redundant, considering the many other portables I own with synchronous detection.

Long story short:  I was wrong.

Having at last acquired the Tecsun PL-660 last year, I now know it’s a pleasure to operate, and feature-rich for its price. The PL-660 is the bargain in this bunch of benchmark rigs, and significantly so: at an average price of $105 US currently, it is easily half the price of the ATS-909X.

The PL-660 is a pleasure to operate, and a true performer.  Its selectable synchronous detector is one of the best in this group of portables: it’s on par with the Sony ICF-SW7600GR. It locks onto a station and rarely loses that lock. Ergonomics are excellent on the PL-660, too–the buttons have a tactile response, are well marked, and all functions are simple to find. The right side-mounted tuning knob has a smooth action.

The Tecsun PL-660 has been on the market since 2011 and has a dedicated following amongst SWLs, many of whom favor it above anything else in its class.

Of course, the PL-660 isn’t perfect, however. It lacks a line-out jack, something I find essential for recording shortwave broadcasts. The audio from the internal speaker is okay, but not on par with the ATS-909X, or its cousin, the PL-880 (below). Still, at $105 US, the PL-660 is truly a steal.

Tecsun PL-880

PL-880 (1)

The Tecsun PL-880 only started shipping in November 2013. It was highly anticipated as the new flagship portable in the Tecsun line. The PL-880 is chock-full of features and without a doubt, is the most complicated portable I’ve ever reviewed.

The PL-880 feels like a quality piece of kit: its buttons have a highly-tactile response, the tuning/volume wheels are silky smooth, and feel well-engineered. Out of the four portables evaluated here, I find the PL-880 the most pleasurable to operate. One of my favorite features is its dedicated fine-tuning knob, just below the main tuning knob on the right side of the radio.

PL-880-RightSide

Unquestionably, the one feature which makes the PL-880 highly desirable is the amazing audio fidelity you’ll enjoy from its built-in speaker: it’s well-balanced, rich, and clear. I almost can’t emphasize this point enough–the PL-880’s speaker is capable of room-filling audio. It’s one of the few radios I’ve ever owned (other than some of my antique tube radios) that encourage listening to shortwave from across the room, with pleasing results.

The PL-880 also sports the most filter options of any other portable on the market. Indeed, in SSB mode, the filter can be narrowed all the way down to 500 hz, making this CW operator, at least, quite contented.

Cons? Yes, the PL-880 has some. First of all, I feel like its current firmware version leaves room for improvement. One of the first things I had to do after receiving my radio was adjust the muting threshold so that it wouldn’t engage. Many of the PL-880’s adjustments are mysteriously hidden, even undocumented in the manual. One such hidden feature is its synchronous detection, which is the least refined in this set of portables: it has difficulty maintaining a stable lock, thus audio is significantly compromised.

[Click here for our comprehensive (and growing) list of PL-880 hidden features.]

Changing settings often results in the radio “thinking” for a second or two, during which time it mutes the receiver. This phenomenon is most pronounced when changing modes (from AM to LSB, for example). I find it rather distracting.

Still, I do like the PL-880. Its audio and overall quality make up for any annoyances. I suspect it will have a long product life and a loyal following over the coming years.

Evaluating performance

AllFour-LeftSideLine

Since I’m listening to the shortwaves 90% of the time I’m listening to a radio, I’ve limited the scope of my assessment here to the shortwave bands. With that said, none of these radios will disappoint you on AM or FM. I did note in my simple home comparison that the Sangean ATS-909X seemed to be the leader on the FM band.  The Tecsuns were perhaps best on the AM (mediumwave) band.

But what about on shortwave? I like using recordings to evaluate shortwave radio performance, typically representative clips that are 25-60 seconds in length. Why? Anytime I have more than two radios to compare, it gets difficult to switch between radios, insuring that I give each one the same opportunity to receive a station. More importantly, with this method, I can listen to the audio clips on my computer, and flip between them quickly to determine characteristics I like in each.

Before recording, I set each radio in the same spot on a table, though I might change the orientation for optimal reception (since this can differ from one radio to another). I then extend the antennas fully and set all of the filters, gain controls, tone, volume levels, and frequencies to the same position on each rig.  This way, my comparison can be on an “apples-to-apples” basis.

Note that I do not use an external antenna in any of these tests. This because I believe, when considering portables, they should be able to function very well off of their built-in antennas–thus taking into account situations in which employing an external antenna is not practical.

So that you have an opportunity to evaluate each radio in a “blind” test, I’ll tag each audio sample with a number, the order of which will not necessarily be consistent in each consecutive test. After the clips, I’ll reveal which is which.

Strong Signals

FourRadiosAbstract2

When I evaluate relatively strong broadcasts I typically listen for the best audio fidelity and signal stability a radio can offer. Unless there’s an adjacent signal (and in this case, there was not), I open the filter as widely as possible.

One of the strongest stations in my part of the world is Radio Havana Cuba–not always the cleanest signal, but always at blowtorch power levels. In this sample clip, I tuned our four radios to RHC.

To be fair, propagation from this station was poor the day of recording, so you’ll hear a little fading that is not normally present. Additionally, you’ll want to listen to the full clip, as a portion of each contains RHC interviews that were recorded by telephone (thus “tinnier” sounding); you’ll also hear the typical RHC transmitter hum:

Sample #1

Sample #2

Sample #3

Sample #4

You’ll hear that all of these receivers–with the exception of Sample #3–are nearly identical. Sample #3 is less sensitive than the others, thus more prone to shallow fading and a slightly higher noise level. To my ears, Sample #4 has the best audio quality and receiver characteristics, followed by Sample 2 and Sample 1.

Now let’s reveal the radios behind the samples:

  • Sample #1: the Tecsun PL-660
  • Sample #2: the Sony ICF-SW7600GR,
  • Sample #3: the Sangean ATS-909X, and
  • Sample #4: the Tecsun PL-880.

Weak signal DX

AllFour-RightSide

I like comparing radios while listening to weak signals and/or when conditions are less favorable. Since I often listen to weak signals (after all, so few broadcasts are actually directed to North America), it’s an important test.

I found a weak signal from Radio Romania International on 11,975 kHz. Normally, the signal would have been much stronger, but propagation was rough and QSB (fading) pronounced at times. Under these conditions, you get the opportunity to hear how the receiver’s AGC circuit handles fading and troughs, how the noise floor sounds as conditions change, and judge the overall sensitivity.

While I give priority to a receiver’s sensitivity and selectivity, there’s obviously more to evaluate here–for example, the more sensitive radio may be less pleasing to the ear.

If you like, jot down what you observe as you listen to each 50 second clip:

Sample #1

Sample #2

Sample #3

Sample #4

Obviously, the radio in Sample #4 is significantly less sensitive than the other radios–it truly struggled to hear the RRI signal under these conditions.

The other radios were able to hear RRI. Sample #3 sounded fine when there was no fading present, but in the fading troughs, there was a pronounced high-pitched noise–most likely a DSP-based noise. Sample #1 had pretty solid copy with stable AGC (automatic gain control). Sample #2 was the most sensitive of this bunch.

Now let’s reveal the radios behind the weak signal samples:

  • Sample #1: the Sony ICF-SW7600GR,
  • Sample #2: the Tecsun PL-660,
  • Sample #3: the Tecsun PL-880, and
  • Sample #4: the Sangean ATS-909X.

In this particular test, I was most impressed with the PL-660’s sensitivity, but given the choice, I would have chosen the Sony ICF-SW7600GR as the best overall. Why?

The Sony produced audio simply more pleasant to my ears due to the stability of the AGC.

Wondering if others would draw a similar conclusion, I posted the same clips above on my blog, the SWLing Post (http://wp.me/pn3uc-2pl).  I doubted whether many readers would take the time to listen, or to vote, in this blind test. Boy, was I wrong–!

I received about seventy responses by email and in the comments section of my post. All but a very few readers ranked the clips in order of preference. The Sony was the clear favorite, with a total of 40 votes as the best of the bunch. The Tecsun PL-660 was second, with a total of 23 votes as the best. No one voted the PL-880 as best. (Click here for full results: http://wp.me/pn3uc-2qH)

What became very clear from the results and the comments, however, was that people who prefer sensitivity, prefered the PL-660. People who preferred stability, preferred the ’7600GR. In a sense, both were “best,” simply depending on the listener’s preference and/or listening requirements.

Weak single-sideband (SSB)

AllFour-LeftSide

To test the SSB performance of these radios, I tuned to W1AW as they worked a pile-up from Puerto Rico. You will hear some fading. For those of you not familiar with SSB listening, you should note that W1AW sounds a little “grainy” in all of these recordings; this is simply the audio processor on W1AW’s transceiver which is set to be most audible and punch through the static.

Sample #1

Sample #2

Sample #3

Sample #4

W1AW is barely audible in Sample #1. In Sample #2, audio is well-balanced, with good audio, low noise, and a stable AGC. Sample #3 sounds more narrow (even though its filter, like all, was set to the widest setting), but the audio “pops out” of the static and is very intelligible. Sample #4 sounds much like Sample #2, perhaps slightly more sensitive but with slightly less stable AGC.

By now you may have guessed each radio behind these samples…Here’s the lowdown:

  • Sample #1:  the Sangean ATS-909X,
  • Sample #2:  the Sony ICF-SW7600GR,
  • Sample #3:  the Tecsun PL-880, and
  • Sample #4:  the Tecsun PL-660.

I believe the Tecsuns perform best in this category, even though the difference between the two models is pretty dramatic. The PL-880 has the best sensitivity in SSB–indeed, I could have probably lowered the gain on my recorder and made the background noise sound even less pronounced, but I wanted the levels to match the other receivers. I was somewhat surprised its 5 kHz filter sounded so narrow on SSB.

The Tecsun PL-660 had the most pleasant audio, but during QSB peaks, its audio would suffer a little distortion (you only hear this once in this sample, near the end of the recording). The Sony had slightly less sensitivity, but the most stable AGC.

Once again, the Sangean ATS-909X struggled to hear the signal, having the least sensitivity of the group.

A note about the Sangean ATS-909X

909Xkeypad

Alas, the most disappointing radio in all of these tests is the Sangean ATS-909X.

To be fair, however, it’s worth noting that the Sangean performs admirably if connected to an external antenna. Again, I resisted connecting an external antenna in this particular series of tests because I believe a good portable radio’s performance should first be judged upon what it can receive with only its telescoping whip antenna, considering that, when traveling, it’s not always possible to use an external antenna.

Indeed, if you plan to buy a portable that will be hooked up to an external antenna more often than not, the Sangean ATS-909X may be a good choice for you. Its front end can handle external antennas better than most of the radios above (with the Sony as an exception, in my experience).

Syncronous detection

I did not test sync detection, as the Sangean ATS-909X lacks a sync detector and the Tecsun PL-880’s sync detector leaves much to be desired. But many hours of listening to the Sony ’7600GR and the Tecsun PL-660 leads me to conclude that their sync detectors are fairly comparable in performance.

So, how do you translate these results?

Although all of these receivers are considered best in the portable realm for a particular manufacturer, each has a character that suits individual listening skills or requirements.

Herein lies the difficulty offering advice on which portable to purchase. Because radio listening tends to be a solitary hobby, it comes down to personal preference–like choosing a friend. What one person values may matter very little to someone else.

For example, I rarely (if ever) save stations to memory on a permanent basis. Other than temporary auto-tuning memory features, I never give memory functions any weight when making a purchase decision (for myself, that is). Yet there are listeners who place a great deal of emphasis on memory functions.

To be perfectly honest, I think each one of these radios has an individual character that makes it a stand out for a particular type of listening.  While I often sort through my collection to give away radios that I seldom use, you won’t find me letting go of any of these rigs. The Sony ICF-SW7600GR is still my favorite portable for field recordings; its stable nature and robust front end mean that I can hook up long wire antennas if I wish. The PL-880 is the radio I reach for if want robust sound and armchair listening to shortwave and mediumwave–I also find it the best of the bunch to tune, a quality machine harkening back to the glory days of Panasonic and Sony. The PL-660 is my simple, bullet-proof performer–when in doubt of conditions, it’s the radio I reach for. If I owned the Sangean ATS-909X, it would probably become my bedside shortwave; its audio fidelity, large display, stable back stand, and ability to benefit from an external antenna make it very appealing for this purpose.

You can’t go wrong with any of these benchmark performers, so long as you know its weaknesses and strengths–which I hope this review has made clear.

If I had to choose just one of these radios…

FourRadiosAbstract

I’m forcing myself answer this question. While it’s difficult to answer, I believe if I could only have one of these radios for travel…I would chose the Tecsun PL-660. I find it the best overall performer, and a true bargain at its price point.

To be clear, if the Sony ICF-SW7600GR only had a tuning knob, it would be my choice, instead.  If the Tecsun PL-880 handled weak broadcast signals better, it might be my choice.

But this is my personal choice; you might have a completely different answer.  I guess that’s the point I made earlier–it all depends on the listener.

Now…which do you choose? 

Video: Tom reviews the Eton Traveller III


Jay Allen reviews the Eton Traveler III

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The Eton Traveler III

The Eton Traveler III

A big hat tip to SWLing Post reader, John, who shares this link to Jay Allen’s review of the Eton Traveller III via the excellent Herculodge blog.

Teaser? Jay comments that the Eton Traveler III “offers the best AM reception [he has] seen yet in this size and price category among DSP equipped designs.” On the flip side, he was less impressed with SW and FM sensitivity as compared with the Traveler II and Tecsun PL-310.

Click here to read Jay’s excellent comparative review of the Eton Traveller III.

The Traveler III is available from Universal Radio and Amazon for about $59 US at time of posting. 

Shoot-out results: Top ultra-portable shortwave

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Tecsun-ShootOutThanks to all who participated in our ultra-portable shoot-out! A little over a week ago, I posted recordings of shortwave broadcasts, weak and strong, in an attempt to evaluate which recording–thus which radio–our listeners prefer. I conducted this test on the three radios pictured above: the Tecsun PL-310ET, the CountyComm GP5/DSP (Tecsun PL-360), and the Tecsun PL-380–among the most popular ultra-portables currently on the market. This test was “blind” in the sense that all three radios evaluated were merely labeled “Radio 1,” “Radio 2,” and “Radio 3,” respectively.

The samples

To refresh your memory, I’ve embedded the audio samples below for you to hear; but if you haven’t yet heard them, I encourage you to read our previous post before doing so. (If you’re already heard the recordings, simply skip this section.)


Global 24 – 9395 kHz (Strong)

Radio 1

Radio 2

Radio 3


ERT Open/ Voice of Greece (Relatively strong)

Radio 1

Radio 2

Radio 3


Radio Riyadh (Weak)

Radio 1

Radio 2

Radio 3


Rádio Bandeirantes (Very weak)

Radio 1

Radio 2

Radio 3


And now…the results!

The following chart shows how each radio scored out of a total of 106 (wow!) survey responses:

ShootOutRadios

Let’s start with the radio that scored lowest in this contest…

Radio 3: the CountyComm GP5/DSP (a.k.a., the Tecsun PL-360)CountyCommGP5DSP

Interestingly, the GP5/DSP consistently came in last in every category. I think a few factors outside of receiver performance led to this.

For some reason, the recorded audio of the GP5/DSP sounds out-of-phase.  Several of you noted this. The resulting sound almost mimics a “stereo” effect. No matter how many times I made recordings on the GP5/DSP, this feature predominated, and I eventually assumed it to be characteristic of this radio’s DSP.

But I’m wondering now, however, if there might be oxidation on one of the headphone jack conductors, or if the headphone jack on my unit is somehow faulty–?  Because of this, before conducting the medium wave shoot-out, I’ll try to clean the conductors with a little Deoxit to see if it makes a difference.

Unlike the PL-310ET and PL-380, the GP5/DSP can’t change AM bandwidths. On the strong recordings, I widened the bandwidths of the PL-310ET and PL-380 to 6 kHz; this improved their audio fidelity. On weak signals, I narrowed the bandwidth to 3 or 4 kHz, keeping both at the same level as I did so. While the GP5/DSP’s fixed bandwidth is well chosen, it simply couldn’t compete with the wider filters of the other two radios on strong signals.

Though the GP5/DSP (Tecsun PL-360) came in last, the irony is that most people who made comments on the survey form actually mentioned that the GP5/DSP was also a strong contender. Here are a few responder’s comments:

  • “The bassiness of Radio 1 was pleasing to listen to, but the clarity of radio 3 was also pleasing. All three sounded very good.”
  • “I was divided–Radio 1 seemed to provide the better audio on the stronger stations (not as muddy) yet Radio 3 beat it out on the weak stations and seemed to hold the station steadier (less fading) thereby providing a better audio to hear and understand.”
  • “I think if I were to place these three radios in order of “listening pleasure” based on the provided samples, my order would be 3, 1, 2.”
  • “By a small margin Radio 3 seemed to have the best signal to noise ratio and general audio quality across the range of signal strengths.”

Also notable:  the GP5 has one very distinct advantage over the other two radios, something that wouldn’t have been noticed in this test: its ETM function, which scans the whole band then automatically stores stations to temporary memory, is almost two times faster that that of the other radios. It also seemed to be equally accurate.

So, who would buy the CountyComm GP5/DSP (Tecsun PL-360)? Someone who likes this radio’s form factor, it’s stable AGC, and quick ETM scanning. Keep in mind, we are comparing this model with two of the best radios under $60, in my opinion. Had we compared the GP5 with most other sub-$60 radios, it might have won that shoot-out, and with ease.

Click here to purchase the CountyComm GP5/DSP. [Note that the new CountyComm GP5/SSB should be available soon–I plan to review it shortly thereafter.]

Radio 2: The Tecsun PL-380

Tecsun-PL-380

The Tecsun PL-380 came in a very consistent second place in this shoot-out.

The ‘380 is one of my favorite portables on the market; for many years, it has been my go-to radio for one-bag travel.

Before recording the shoot-out, I guessed that the PL-380 might take first place. But up to this point, I had never actually compared it with either of the two other radios in this shoot-out. Listening to the blind samples, I tend agree with the results.  Still, the PL-380 is a great value and a fun little radio, one I can still easily recommend for travel.

Click here to search for the Tecsun PL-380 on Amazon.com, click here for eBay and click here for Universal Radio.

Radio 1: The Tecsun PL-310ETTecsun PL-310ET

As you can see from the graph, the Tecsun PL-310ET won our shoot-out in every category–and by a fairly wide margin:

UltraPortableShootOut

While comparatively few participants’ comments were specific to the PL-310ET (“Radio 1″), it’s interesting that these most often made note of this radio’s very close resemblance to the PL-380 (“Radio 2″).

The PL-310ET had only a slight advantage over the PL-380 to my ear, but it was enough; so along with most survey respondents, I took note of that advantage.

Now, I know this much: when people ask me whether they should purchase the PL-380 or PL-310ET, I think I’ll suggest the PL-310ET. In the end, it makes for a better travel radio because it also has an external antenna jack, one of the few sub-$60 radios that has this useful feature.

In summary, the Tecsun PL-310ET is truly a fantastic ultra-portable radio, and, at $48 – 52 US, it’s a real bargain, to boot.

Click here to search for the Tecsun PL-310ET on Amazon.com, click here for eBay.

Coming soon…our medium wave shoot-out!

When I find the time in the next month or so, I plan to test the same radios in a medium wave (AM) shoot-out. Weak-signal medium wave will put AGC circuits and internal ferrite antennas center stage. Please be patient, however, as these tests actually take time to put together and evaluate.  Again, your participation will be most welcome!

The SWLing Post 2014-2015 Shortwave Radio Buyer’s Guide

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RadiosShootOut-SonyTecsunSangean

The following article originally appeared in the November 2014 issue of The Spectrum Monitor magazine.


Although many large government shortwave broadcasters are departing the shortwave radio scene, there’s no shortage of great products being introduced to it. Indeed, growth in the portable and SDR (software defined radio) markets is reasonably rapid.  This suggests, perhaps, a new kind of future for shortwave.

The following is a basic, easy-to-follow buyer’s guide to some of the best receivers on the market. This guide is, by no means, comprehensive; rather it’s a selection of rigs I know or own, thus have tested.

Compact/Travel portables

If your budget is tight, or if you’re looking for a radio that could easily slip into your glove compartment, backpack, carry-on, or even jacket pocket, you need to look at an compact shortwave radio. Typically, there is a performance compromise with compact radios: they don’t typically have the sensitivity, like their more expensive cousins; they have a more limited frequency range; and they don’t detect single-sideband signals. Nonetheless, the ones listed here are fine performers for their size and price. Entries are listed in alphabetical order.

ccradio-swpCrane CCRadio-SWP

The CC Radio SWP has been on the market for many years and has become a classic portable. The layout and design are very simple, the display clear, with easily-read icons and intuitive controls. The tuning knob on the right side is for fine tuning–no muting or chugging between frequencies, either. Shortwave and MW sensitivity are better than one might expect for a radio this size; I often find myself comparing it to much pricier portables. But most significantly, this radio offers the longest battery life of any radio I own: almost 70 hours on 2 AA cells!

The CC Radio SWP is available from C.Crane for $55.00 US. You can also purchase the CC Radio SWP from Universal Radio ($44.95) and Amazon.com.

Note: The CC Radio SWP may soon be replaced by the new CC Skywave which has just started shipping at time of posting.

KA1103Kaito KA1103 or Degen DE1103

The Kaito KA1103 packs a lot of bang-for-your-buck if you’re looking for an inexpensive, ultra-portable entry into SWLing. Like the CC Radio SWP, the KA1103 (a.k.a. Degen DE1103) has enjoyed a long market life. The KA1103 is full-featured and one of the only sub-$100 radios with SSB mode. One interesting design feature of the KA1103 is its large Digital/Analog frequency display: the LCD screen features the frequency display in digits, but also sports a working digital representation of an analog frequency dial. As you tune up and down the band–with, yes, a tuning knob–the LCD needle moves along the display as it would on an analog radio dial. While I believe radio ergonomics could be improved, the KA1103 is still a great bargain.

The KA1103 is available at Universal Radio for $79.98 and Amazon.com for $79.99. Click here to search eBay for the Degen DE1103.

Tecsun PL-310ETTecsun PL-310ET

The Tecsun PL-310ET is an updated version of the acclaimed PL-310, a mini-legend in the world of portable radio, offering exceptional value and high-performance in a small package. The PL-310ET is fueled by a SiLabs DSP (Digital Signal Processing) chip that gives this ultra-portable excellent sensitivity and selectivity. The PL-310 has been a favorite amongst ultra-light Dxers, as sensitivity and selectivity are  exceptional for the price. The new “ET” version of the PL-310 sports ETM tuning; a feature which allows you to scan the entire band and automatically store all strong stations to temporary memory locations. I believe the updated PL-310ET also has better AGC for weak signal DXing than its predecessor. Another bonus is that the PL-310ET sports an external antenna jack for shortwave and FM reception.

The Tecsun PL-310ET is largely available from Hong Kong-based sellers on eBay (http://ebay.to/1seZP3h) as well as on Amazon.com.

Tecsun-PL-380Tecsun PL-380

The Tecsun PL-380 is my favorite radio under $60. Much like its cousin, the PL-310ET (above), the PL-380 has a DSP (Digital Signal Processing) chip that gives this ultra-portable excellent sensitivity and selectivity. For three years, I have traveled extensively with the PL-380 in tow, and I’m constantly amazed by this radio’s excellent audio and reception across the bands.

The Tecsun PL-380 is available from Universal Radio for $59.95 and from Amazon.com for $54.99. Click here to search eBay for the PL-380.

Tecsun offers a number of compact portables, based on a similar DSP chip as the PL-380, but with built-in stereo speakers. Check out the Tecsun PL-390, PL-398BT, and PL-398MP, too.

Full-Featured Portables

In the portables market, I believe you get the most value and quality in the $90-250 price class. Most beginners and seasoned SWLs prefer a radio that includes everything necessary to get on the air immediately; all of these radios provide just that. Straight out of the box, you’ll have everything you need to listen to shortwave bands. All of these recommended radios are designed to pick up major shortwave broadcasters with ease, and offer the following features: good frequency coverage; circuitry that helps in the detection of weaker stations; and the ability to receive single-sideband (with the exception of the CCRadio-SW, see below).

ccradio-swCrane CCRadio-SW

If you’re not as concerned about portability, the C.Crane CCRadio-SW is an excellent broadcast receiver. Think of the CCRadio-SW as a larger portable or tabletop radio (11.25″ x 7.25″ x 3.5″). What makes this radio stand out from its peers? Exceptional audio fidelity. The large built-in speaker has separate treble and bass controls and reminds me how important audio quality is while listening to a faint signal. This radio’s audio will fill a large room. Shortwave sensitivity is very good. Medium wave (AM broadcast) reception is excellent. Negatives? No direct keypad for frequency entry, and the SW also lacks a native SSB mode (a rare missing feature in this price class). With that said, it does have impressive array of external connections, including an IF-Out connection, which (with an IF converter and some free software) will allow you to interpret SSB and an array of digital signals, including DRM (Digital Radio Mondiale). What really strikes me about the CCRadio-SW is its sheer ease of use.  Its design is simple, ergonomic, and highly effective. I’ve often recommended the CCRadio-SW to listeners who want simplicity of use and robust audio.

The CCRadio-SW is available for $149.95 at C.Cranes’ website, $129.95 from Universal Radio and is also available on Amazon.com. Click here to check eBay for used models.

Radios with a similar form-factor include the Grundig S450DLX and the new Eton Field.

ATS-909XSangean ATS-909X

At $249.95, the Sangean ATS-909X is one of the priciest full-featured portables on the market. The 909X sports a large alpha-numeric display, tactile buttons, and a solid build quality. I also believe the 909X has a one of the better internal speakers and audio fidelity amongst portables. Negatives? Surprisingly, the 909X lacks synchronous detection, a tool most other portables have in this price range. Additionally, in my recent shortwave portable shoot-out, I gave the Sangean low marks for sensitivity; this review was based upon use of the built-in telescopic antenna. With an external antenna, on the other hand, the 909X performs admirably. If you’re looking for a quality portable with a front-end robust enough to be attached to a larger external antenna, the 909X may very well be your radio.

The Sangean ATS-909X is available at Universal Radio for $249.95 and Amazon.com for $219.99. Click here to search for used ATS-909Xs on eBay.

Sangean still has several models of portables available.  Check out the Sangean ATS-404 and ATS-505P.

Sony7600GRSony ICF-SW7600GR

For performance, you’ll find that the Sony ICF-SW7600GR is top of its class among full-featured portables. Two of its outstanding features is a solid synchronous selectable sideband (a feature which helps to reduce fading distortion and adjacent-channel interference) and stable AGC circuit. In fact, the ICF-7600GR was chosen as a favorite in a blind audio test on the SWLing Post. Indeed, my only criticism of the ‘7600GR is that it lacks a tuning wheel; instead, you’re forced to use tuning buttons on the front face of the radio.

The Sony ICF-SW7600GR is available at Universal Radio for about $150.00 and at Amazon.com for $130-150.00. Click here to search eBay for a used ICF-SW7600GR.

KX3-Helper-Tecsun-PL-600Tecsun PL-600

The Tecsun PL-600 is the value leader among the full-featured portables in this list. It can be found at a wide array of retailers, such as Universal Radio, Amazon and eBay. Price ranges from about $65 to $90. I’ve often recommended the PL-600 as a first full-featured radio for the budding SWL, and for good reason: the PL-600 has great sensitivity, selectivity, and even has capable single-sideband reception. The PL-600 does a surprisingly good job of holding its own against the other contenders in this list. Negatives? Like all sub-$100 portables, the PL-600 lacks synchronous detection (and if this is a deal-killer for you, check out the PL-660). Additionally, the PL-600 is not well suited for large external antennas; but it does work quite well with its own antenna. In a nutshell: if you’re not willing to spend over the $100 mark, the PL-600 is a safe bet.

The Tecsun PL-600 is available at Universal Radio for $89.95. Click here to search eBay for new and used PL-600s.

PL-660Tecsun PL-660

The Tecsun PL-660 is one of the best selling portable shortwave radios currently on the market–and for good reason. This rig has a full compliment of features and is quite easy to operate. The sync detector (selectable USB/LSB) is currently one of the best in the sub $150 US price range. Sensitivity and selectivity are both excellent; indeed, I consider it to have the most sensitive receiver among the portables listed here (and so. With the introduction of the Tecsun PL-880 on the market, the PL-660 has also become more affordable and can be found at or near the $100-120 price point with shipping. What a bargain!

The Tecsun PL-660 is available at Universal Radio for $109.95 and on Amazon.com (prices vary). Click here to search fro a new or used PL-660 on eBay.

Tecsun PL-880PL-880 (1)

The Tecsun PL-880 was introduced to the market one year ago (November 2013), and while the introduction was a bit bumpy (feature variation based on differing firmware versions), it has recovered and found quite a good following. While the PL-880 does not rank as highly as the PL-660 or ICF-SW7600GR in terms of sensitivity (see review TSM June 2013) it does have compensating factors.  For one thing, the PL-880 has the best audio fidelity from its internal speaker among the radios listed here. It’s also the most feature rich, boasting the most filter selections and a growing number of “hidden” features (http://wp.me/pn3uc-2tl). I also love the build quality, ergonomics, and tuning options; indeed, the PL-880 even has a dedicated fine tuning control. Negatives? Though the PL-880 has an undocumented sync detection among its “hidden” features, I find its sync lock quite feeble, compromising audio fidelity a bit too much. If you’re looking for a small portable that will fill a room with rich audio–whether you’re listening to the BBC, a classical concert, or just two ham radio operators chatting on 40 meters– look no further than the PL-880.

The Tecsun PL-880 is available at Universal Radio for $159.95 and on Amazon for $159.99. The Tecsun PL-880 is also available from Hong Kong-based sellers on eBay.

New Eton portables now shipping

Eton-SatellitAt time of publishing, Eton Corp–the North American distributor of Grundig–has four updated models of shortwave portables new to the market. All are updated versions of recently retired Grundig models:

If history is a guide, I expect all of these radios to prove worthy of the 2016 Shortwave Radio Buyer’s Guide. Indeed, preliminary reviews of the Field have been most favorable. Barring schedule changes, all models should be available in time for the 2014 holiday season…Stay tuned.

Tabletop receivers

While tabletop receivers have started to decline with the advent of SDRs, there are many listeners who still prefer a simple, dedicated, stand-alone high-performance receiver with a good tuning knob and clear display, which is to say, a tabletop receiver. Tabletops are designed to perform best with a resonant external antenna.

AlincoDXR8TFrontFaceAlinco DX-R8T

I reviewed the Alinco DX-R8T in 2011 a few months after it was introduced. I was favorably impressed with the DX-R8T. So much so, I purchased one after the review. It has excellent selectivity and sensitivity, a large display and tuning knob, a detachable faceplate (if your desktop space is limited), and a decent built-in speaker. What’s more, the DX-R8T has an SDR mode that allows you to hook up the receiver to your PC to see a spectrum display, and with an optional accessory cable, control its rig functions and tuning. The DX-R8T requires a regulated 12-volt power supply (not included). Cons? The DX-R8T lacks a selectable synchronous detector–a feature I enjoy using to combat adjacent signal interference.

The Alinco DX-R8T is available at Universal Radio for $449.95. Click here to search eBay for the Alinco DX-R8T.

Icom-R-75Icom R-75

Various versions of the Icom R75 have been on the market for well over a decade.  This receiver stands the test of time because it’s a full-featured tabletop with attributes like twin passband controls, a two-level pre amp, separate AF/RF gain, adjustable AGC, an alpha numeric display, a direct frequency entry keypad, not to mention a logical, ergonomic layout for all controls.  Amateur Radio operators, pirate radio listeners, as well as utility broadcast listeners will all appreciate the R75’s performance in SSB mode. Cons? The current base version of the R75 lacks synchronous detection, though some models in the past have had this option.

The Icom R75 is available at Universal Radio for $669.95. Click here to search eBay for the R75.

SDRs/IF Receivers

If you’re searching for maximum performance for the price, software-defined radios (SDRs) and IF receivers are hard to beat. These small “black box” radios require a computer to unlock their performance; none of these are stand-alone. But while I’ve never been a fan of combining my PC with radio listening, once I starting using an SDR, I never turned back.  Now, 90% of the time that I’m on the air, it’s with an SDR. They’re simply incredible.

The following selection of SDRs–and IF receivers–are all available for $1,000 or less.

BonitoRadioJetDaytonBonito RadioJet IF-Receiver 1102S

The Bonito RadioJet is included in this group because it is very similar to an SDR, but strictly speaking, it’s an IF receiver. Like an SDR, it requires a PC for operation. But while the RadioJet’s spectrum bandwidth is more limited than the SDRs that follow, it has advantages over the others.  For one, the RadioJet is more akin to a PC-controlled radio–most of the hard work is done in the receiver itself, not your computer–-so even older model Windows PCs, tablets and netbooks can run the  RadioJet application with ease. The RadioJet is great for travelers since it requires no external power supply: it derives its power from your computer, from the same USB cable used for data. The RadioJet is an excellent receiver and has a very low noise floor. If you like listening to DRM, you’ll be impressed with its native ability to decode the mode. Click here to read my comprehensive review of the RadioJet.

The Bonito RadioJet 1102S is available at Universal Radio for $649.95. The RadioJet can also be purchased directly from Bonito in Germany.

Elad-FDM-S2-CoffeeElad FDM-S2

If you’ve read my Elad FDM-S2 review (coming soon!) you’ll know that this little SDR packs a powerful punch for the price. Indeed, I would venture to say that the FDM-S2 offers the best value among the SDRs listed here. Its performance is uncompromising, comparing favorably to receivers $300-400 more in price. The S2 also provides native DRM decoding.  In short, the S2 makes for a fine DRM receiver.

Any negatives with this rig? Some users have reported diminished receiver performance in the presence of high-powered AM stations (fortunately, not an issue in the rural area where I live). Additionally, the Elad application has a greater learning curve than, say, the Perseus or the Excalibur (below). Still, I like the S2 so much that even though I already own a benchmark SDR, I’m planning to purchase the S2 after review.

The Elad FDM-S2 is available at Elad USA for $580.00.

PerseusMicrotelecom Perseus

If you’re looking for a benchmark SDR, it’s hard to overlook the venerable Microtelecom Perseus. Though it’s been on the market for many years now, the receiver architecture holds its own and is as robust as they come. Selectivity and sensitivity are absolutely superb: no matter the mode or band. Another benefit of the Perseus is that users can network their receivers with relative ease, sharing them with other Perseus users. Negatives? The Perseus price point still tops the charts at $1000. And while the supplied application works quite well, it lacks features found in other SDR apps, and the window cannot be resized (though numerous customer requests have been made). Still, the Perseus is likely to remain a DXer’s receiver of choice for years to come.

The Microtelecom Perseus is available at Universal Radio for $999.95. Click here to search eBay for a used Perseus.

WinRadio Excalibur

I have owned the WinRadio Excalibur since 2012, and it has become my primary home receiver. I have directly compared the Excalibur to the Microtelecom Perseus and the Elad FDM-S2 (above); any receiver performance differences are minor. As a radio broadcast archivist, I find the Excalibur to be the best receiver suited to capturing broadcasts, as it’s the only one in this group that can record up to 2 MHz of radio spectrum (and allow you to play back this recording later); up to three broadcasts can be captured simultaneously within that 2 MHz window. Negatives? The Excalibur application only works on Windows PCs. Additionally, it requires a dedicated 12V power supply, thus is less convenient than the RadioJet or FDM-S2 for travel and outdoor listening. Read my full review of the Excalibur by clicking here.

The WinRadio Excalibur is available directly from WinRadio for $945.95. Click here to search eBay for a used Excalibur.

Hybrid Stand-Alone SDR/Tabletops

The CommRadio CR-1

CommRadio CR-1a

The CommRadio CR-1a could be classed as either an SDR or a stand-alone tabletop receiver, as it fits both profiles. Furthermore, the CR-1a is as portable as nearly any of the portable radios mentioned above. In short, I really dig this radio! It’s beautifully engineered and mil-spec rugged; performance-wise, it’s hard to beat. Receiver sensitivity and selectivity are superb. The best part? The CR-1a has an optional internal battery that will power it for hours on a single charge. With antenna and fully-charged CR-1a, you will enjoy hours of outdoor listening while traveling [check out my recent travel review]. If you’re on the fence about getting an SDR or tabletop radio, grab the CR-1a; at $599.95, it’s a lot of kit for your investment. Click here to read my comprehensive review of the CR-1.

The CommRadio CR-1a is available from Universal Radio for $599.95 and directly from CommRadio for $599.99. Click here to search eBay for a used Comm Radio CR-1 or CR-1a.

The Shortwave Radio Index

If you would like to view a comprehensive list of all shortwave radios currently on the market, check out the Shortwave Radio Index (http://swling.com/db).

A review of the Elad FDM-S2 software defined receiver

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FDM-S2-Front

The following review originally appeared in the November 2014 issue of The Spectrum Monitor magazine.


At the Dayton Hamvention this year, I made it a special point to check out the Italian radio manufacturer, Elad.

Although I’ve known about Elad and their products for some time, and often found them intriguing, I hadn’t yet investigated Elad’s offerings simply because I was under the impression they sold and warrantied their equipment only within Europe. Indeed, this was the case…until just recently. Elad has now begun shipping–and supporting–their products within the US, via their division Elad-USA. Thus my renewed interest in Elad at the Hamvention.

Elad-Dayton-Hamvention

At their Hamvention booth in the East Hall of Hara Arena, the Elad staff gave me a superb table-tour of their array of products. Indeed, I was completely unaware of the broad scope of Elad’s product offerings, which include antenna switches, antenna splitters, test equipment, and, of course, software defined radios (SDRs). Their current SDR offerings are as follows: the Elad FDM-S1, the FDM-S2, and the newly released FDM-DUO. The FDM-DUO is actually a transceiver, while the “S” line is receive-only.

Elad-Radios

Among Elad’s SDRs, I found myself most interested in the FDM-S2 receiver; a quick demo at their booth caught my interest, as I instantly liked the GUI (graphical user interface), the features, and the specifications of this model. I requested that Elad provide the loan of this SDR for review, and they kindly complied.

Unboxing and installing the Elad FDM-S2

FDM-S2-Box

Contents of the FDM-S2 box are few and simple: the FDM-S2 receiver, a black cloth carrying bag, and a 4GB USB drive with installation software and documentation are enclosed. A standard USB cable was also included in the shipping box.

FDM-S2-Box-Contents

I found installation of the S2 to be fairly straightforward. I would encourage new owners to follow the included guide, since installation is a two-part process:

  • First, you install a C++ package on your Windows PC. When complete, this triggers the actual Elad software installation, a two-part installation that you initiate only once.
  • Secondly, you install the USB driver for the FDM-S2, found in the installation folder of the supplied software. Note: at present, the USB driver cannot be automatically discovered and installed by your PC–you must initiate this installation via the device manager. However, this is very easy: the guide takes you through the process step-by-step.

On the back of the FDM-S2 you’ll find an HF and VHF SMA antenna ports, a USB port, serial interface, and on/off switch.

FDM-S2-Back

The FDM-S2 derives its power from the same USB cable that is used for data; no separate external power supply is required–a huge plus, for those of us who like to travel.

Once I installed the software and driver, I hooked up my antenna to the HF SMA connector on the back, turned on the FDM-S2, and launched the application. The FDM-S2 clicked to life, and the application ran on the first go–very nice!

Scope of this review: application

Reviewing an SDR is challenging, especially with a third-generation SDR like the FDM-S2. There are nearly an infinite number of setting combinations for gain control, filters, demodulation, audio, even color schemes; covering all of these is beyond the scope of a basic review such as this, or indeed, virtually any review. In addition, the FDM-S2 can be used with several third-party SDR applications. Therefore, for the sake of this review, I decided to limit myself to evaluating the Elad application that ships with the FDM-S2. In addition, in this evaluation I attempted to retain many of the settings that come as defaults in the Elad application, to support new users. Finally, I limited myself to evaluating the shortwave bands.

After installing the Elad application, I spent a good hour or so familiarizing myself with the software. It’s quite a departure from the WinRadio Excalibur, SDR-IQ, and Microtelecom Perseus applications with which I’m most familiar. There is a modest learning curve involved with using the Elad FDM-S2–it took a good hour with the application to feel relatively comfortable with its functionality. But the trade-off is much more customization and functionality than one can achieve with the Perseus or WinRadio software, for example.

First impressions

Elad-FDM-S2-FrontPanel

First, let me begin by saying that new users will greatly benefit from reading the owners manual and join the Elad Yahoo group. If you’re attempting something that the owner’s manual does not cover, most likely someone in the Elad forum has already posted the answer. Elad’s engineer, Franco, also actively monitors and responds to requests on the Yahoo group.

Once on, the FDM-S2 defaults to the frequency of 0 Hz. Indeed, the Elad software uses Hz as the unit of measure for frequency, so any frequency entered must be in Hz: for example, to enter 9,420 kHz, you must key in 9420000, then press “Enter.” As a shortcut, you can enter 9420 and the “+” key on your number pad which will automatically add the trailing “000.” I found that a bit unusual in the beginning as most SDR software defaults to kHz, but after using the FDM-S2 for a few minutes, it became second nature.

There are several ways of tuning the FDM-S2:

  • Frequencies can be directly keyed in (as described above)
  • You can click on a frequency in the spectrum and waterfall windows (if the center frequency isn’t locked)
  • You can use the scroll wheel on your mouse like a tuning wheel, to scan up or down
  • You can use the arrow keys on your keyboard (left/right are defaults with up/down controlling tuning steps)
  • With your mouse pointer, you can click and drag one of the three horizontal tuning bars at the bottom of the window
TuningBars

Tuning Bars: Click to enlarge

I find it easiest to tune by using the horizontal tuning bars to move to a particular meter band, then locking the center frequency and use the scroll wheel on the mouse to scan in 1 or 5 kHz increments. This makes tuning feel like the experience I’m most used to with other SDRs. I must say that I really like the horizontal tuning bars; these make it quite easy to quickly center on a meter band.

I would also note that I’m favorably impressed with the S2’s waterfall and spectrum display; not only can you customize the colors via the settings window, but you also have the options to embed timecode in the waterfall and to display broadcaster information from the frequency database in the spectrum.

FullScreenShot-FourRX

The FDM-S2 has a total of four “virtual receivers,” labeled RX1, RX2, RX3 and RX4. Depending on the receiver configuration and bandwidth you’ve chosen in the S2’s device configuration (see below), you can use each virtual receiver simultaneously. Each receiver can have its own filter settings and modes selected–your only limitation is that each of the four receivers must be tuned within the FDM-S2’s bandwidth.

FDM-S2 receiver bandwidth configurations

The S2 currently has seven receiver configurations:

  • 1 Channel 192 kHz bandwidth
  • 1 Channel 384 kHz bandwidth;
  • 1 Channel 768 kHz bandwidth;
  • 1 Channel 1,536 kHz bandwidth;
  • 1 Channel 3,072 kHz bandwidth;
  • 1 Channel 6,144 kHz bandwidth; and
  • 2 Channels 384 kHz bandwidth.

If you set the S2 to a total bandwidth of 192 kHz in one channel, all four of your virtual receivers are limited to that 192 kHz area. This is a great configuration if you plan to listen to a single broadcaster at a time, and don’t need to see so many signals within the spectrum display. It’s also an excellent configuration to save storage space if you wish to record a relatively small chunk of IF spectrum.

FDM-S2-DeviceSettingWindow

If you choose the 6,144 kHz bandwidth, you can use each of the four virtual receivers simultaneously within the bandwidth. For example, on Saturday evenings I could tune RX1 to the Voice of Greece on 9,420 kHz; RX2 to The Mighty KBC 7,375 kHz; set RX3 to search for pirates around 6,925-6,975 kHz; and listen to the 40 or 30 meter ham radio bands on RX4. All at once! [Note: in the screenshot above, each virtual receiver is marked in the spectrum with a green, yellow, red or blue vertical marker.]

The two-channel 384 kHz option is also a powerful and unique feature of the S2. With this configuration selected, you can have two completely independent receivers with 384 kHz of bandwidth, each. Though this may be more radio than you need, each receiver has four virtual receivers of its own. That’s a whopping 8 virtual receivers!

Most of the time, I keep the configuration set to 1,536 kHz, unless I want to listen in two different meter bands at once. At 1,536 kHz, I can record spectrum and capture a full broadcast band to play back later. I’ve even recorded 6,144 kHz of spectrum, and played it back with no hiccups on my Intel i5 PC, although it did chew through a lot of storage space (roughly 2 GB of data per minute of recording). That equates to 120 GB per hour–but the result is a recording of everything between, say, 4 and 10 MHz. For shortwave radio archiving this is a most impressive capability!

DRM

While Digital Radio Mondiale (DRM) is not the most popular mode on the shortwave broadcast bands, DRM is built into the FDM-S2; there is no need to purchase a separate license or plugin as with most SDRs. If you’ve never listened to DRM, you might be surprised by the impressive listening results.

Within the first few days of using the FDM-S2, I was simply blown away by the DRM signal lock I achieved with Radio New Zealand International. Indeed, I’ve found that the FDM-S2 provides the most stable DRM decoding locks of any other receiver I’ve tested to date.

Here is a two hour audio sample of the FDM-S2 recording RNZI DRM:

[On a side note: It simply boggles my mind when I realize that this RNZI broadcast originates from a transmitter some 8,400 miles (13,518 km) from my receiver. Regardless of what one thinks about the future or utility of DRM, this is nothing short of magical in my book.]

Note that only the first virtual receiver, “RX1,” employs the DRM mode. This is important to note, as I find I’ve sometimes finished listening to a DRM broadcast, turned off the FDM-S2, then when I turned it back on later, initially wondered why I was hearing no audio on strong AM signals. I had inadvertently left the DRM mode engaged–user error only, in this case. Just something to be aware of.

DRM-Window-FDM-S2-Review

But finding a DRM broadcast is very easy with the Elad software; there is a dedicated button that appears when the DRM mode has been selected. When you press the schedule button, it will load all of the DRM broadcasts from the HFCC schedule. You can simply scroll through this list and click on a frequency to find an audible DRM broadcast. So far, on the FDM-S2, I’ve decoded RNZI, Radio Exterior de Espana, and even All India Radio from my QTH in eastern North America. Not bad!

Recordings

One of the reasons I latched onto the FDM-S2 at the Dayton Hamvention this year was that I immediately saw the potential of the S2 as a recording receiver. Besides posting recordings on the SWLing Post, I also actively make recordings for the Shortwave Radio Audio Archive, so no surprise that one of the first functions I evaluated on the FDM-S2 was its recording capability.

There are two recording modes: AF and Full Span Input Spectrum. You switch between modes in the Recording tab of the Settings window. After the settings have been saved, you simply locate the broadcast or chunk of HF spectrum you wish to record, and press the red record button located on the screen’s bottom left quadrant.

The Elad application also gives you a great degree of control for automatically naming the recorded files; mine is currently set up to embed the frequency, date, time, and device in the filename.

There are few things I’ve reported to Elad as possible improvements for recording:

I do wish that it wasn’t necessary to open the settings window to switch between bandwidth configurations and recording modes (IF or AF); my Excalibur has all of this on the front panel, which is more convenient. While there is a more direct way of opening the recording settings window–simply right click on the red record button–I think it would be preferable to at least have the option of including the information on the main user interface. Also, when you stop a recording, the receiver turns itself off; this obviously needs to be corrected. Fortunately Elad has noted these concerns and plans to address them in future software updates.

Additionally, I’ve noted that while one can record either IF or AF, both can’t be recorded at the same time, a lacking shared, incidentally, by the Microtelecom Perseus. While I probably do more recording than most SWLs, I frequently record both spectrum and an individual broadcast simultaneously on the WinRadio Excalibur. I hope Elad will consider adding this to their software, as well.

Performance

Features are always nice to play with, and the FDM-S2 is chock-full of them–but most important are your receiver’s ability to detect faint signals, block adjacent ones, as well as cope with unpredictable conditions.

Elad-FDM-S2-BackPanel

The FDM-S2 has a wide frequency coverage: 9 kHz-52 MHz, 74-108 MHz, and 135-160MHz. It’s one of the few SDRs on the market that doesn’t need a module or add-on for FM and VHF coverage. It has separate SMA connectors for HF and VHF antennas. While I have not thoroughly tested beyond the HF bands as of this writing, but many experienced FM DXers tout the S2’s abilities in their own reviews, and I don’t doubt them.

On the shortwave bands, the S2’s performance has impressed me: this SDR has remarkably excellent sensitivity and selectivity. Indeed, its performance is on par with my WinRadio Excalibur, and surpasses that of my RFSpace SDR-IQ, no mean feat. I have made many A/B comparisons with my Excalibur on weak signals; the two receivers are nearly indistinguishable. I’ve conducted blind-listening tests on weak signals (much like those described here) and found that the two recordings were nearly identical. On occasion, I might favor one receiver’s AGC over the other in a recording, but a slight tweak to the AGC settings could readily fix any discrepancies.

Herein lies the difficulty of reviewing an SDR’s performance–the user has so much power to control variables and thus shape the receiver’s function, that it’s hard to make an “apples-to-apples” comparison. But clearly, the Elad holds its own.

Noise reduction

While I’m not a great fan of digital noise reduction, the Elad software has a variable noise reduction feature that I admit to have used on several occasions. I found that by increasing it to approximately 10-20%, audio characteristics of an AM signal were mostly preserved while noise was effectively mitigated. This is where the S2 has a distinct advantage over the Excalibur which has no noise reduction feature.

AM Synchronous detection

With that said, the Excalibur has an edge on the S2 when it comes to blocking adjacent signals. At the time of review, I’m using version 1.12 of the Elad software, which lacks a selectable AM sync detector–a powerful tool to block noise, which may only be present in one sideband of an AM broadcast. Elad engineering tells me that they have this feature planned for a future software update.

Flexibility

Remarkably enough, the FDM-S2 can actually be used with a number of third-party SDR applications. The FDM-S2 comes with Winrad EXTIO Dlls compatible format: all software based on Winrad derivatives (like HDSDR and Studio1) work, and have been tested by S2 users. So if I really need sync detection, for example, I can simply find and use another SDR application to run the S2.

Indeed, flexibility may be among the most powerful features of the S2. If for any reason you don’t like the Elad application, you can simply use another one.

Summary

Invariably, all radios have strengths and weaknesses; here is a list of my notes from the moment I put the S2 on the air:

Pros

  • Beautiful, rich audio fidelity via headphones or my amplified speakers
  • Excellent sensitivity
  • Excellent selectivity (which would be enhanced with USB/LSB selectable sync–see con)
  • Low noise floor
  • Four virtual receivers: RX1, RX2, RX3, and RX4
  • Superb DRM decoding built-in, no additional license key or plug-in purchase required
  • Noise reduction is quite effective with few digital artifacts, even at low levels
  • Tasteful waterfall and spectrum displays
  • Wonderfully rapid tuning via horizontal tuning bars
  • Power derived from USB port (no external power supply needed)
  • Separate HF/VHF antenna ports
  • Ability to embed and record UTC time in waterfall display
  • Can display schedule information in waterfall and spectrum
  • ES2 supported by third-party OEM and open-source SDR applications; not confined to Elad application (as tested)
  • Small form factor/footprint, convenient for travel or limited shack space
  • Networking features for remote receiver control (not tested)
  • Iterative agility: application/firmware updates influenced by customer feedback
  • Great value–$300 less than most of its competitors

Cons

  • Recording cannot be fully controlled from the front panel; to adjust most settings, you must do so via a separate settings window
  • Receiver turns off completely after stopping a recording (Elad plans to fix this)
  • AM sync currently lacks USB/LSB selectivity
  • Elad application has steeper learning curve than other OEM SDR applications
  • Though highly customizable (see pro), changing color schemes requires patience and practice
  • Some reports from users indicate that sensitivity may be compromised if you live near a blowtorch AM station
  • IF and AF recordings cannot be made simultaneously; AF recordings cannot be made from an IF spectrum recording without a virtual audio cable application (similar to the Microtelecom Perseus)

Elad-FDM-S2-FrontPanel

While the Elad FDM-S2 has some growing to do, I expect many of these concerns may be addressed in updates over time, and I look forward to trying the S2 with other SDR applications. I’m fairly confident that Elad is serious about their products’ iterative agility, which is to say, software development based on customer input. They’ve been responsive to email and active on the Elad Yahoo email discussion group, which indicates promise. I believe they’re serious about supporting the North American market as well as they even attended the 2014 Dayton Hamvention.

Frankly, at $580 US (via Elad USA) I think the FDM-S2 is quite reasonably priced, especially considering this SDR’s performance and features. After all, it’s only $80 more than the RFSpace SDR-IQ, while it is $300-400 less than the Microtelecom Perseus and WinRadio Excalibur. That’s good value, in my book.

But with each review, I always ask myself: “Would I buy it?”

For the Elad FDM-S2, the answer is, unhesitatingly, Yes! I intend to purchase the FDM-S2 from Elad immediately following the publication of this review. I believe it will make a fine addition to the shack–I can see myself using it often for travel, future DXpeditions, and, of course, shortwave radio archiving.

As always, the proof is in the pudding: look for my Elad FDM-S2’s coming contributions to the Shortwave Radio Audio Archive in the near future. And listen for yourself.

Elad FDM-S2: Eric’s method of mitigating strong local signals

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Elad-FDM-S2-FrontPanel

Many thanks to SWLing Post reader Eric Cottrell, who writes:

“Thanks for your excellent review of the Elad FDM-S2. I bought one and received it yesterday.

I tried out the software earlier this week by downloading 4GB of sample files from DK8OK and the Elad software. There are a lot of interesting features.

It is small! I like the use of the USB port for power. I can see how it would be a good receiver to throw into your laptop bag for trips.

I have a harsher Urban RF environment with 5KW and 1KW AM Broadcast transmitters within 2.5 miles. They reduce power at night. The Wellbrook AHA1530 Loop outputs a very high signal level from all the area’s AM stations. I have to use the attenuator on any radio at my QTH below about 2.5 MHz.

The unit having one preselection filter for LW/MW/HF is noticeable as I got ADC Clip warnings when directly connected to the Wellbrook loop. Turning on the 11 dB attenuator took care of the problem and did not seem to affect the weak signals much. It also was not as bad when I connected a Mini-Circuits ZFSC-2-6+ two port splitter between the Elad and the Wellbrook.

The Perseus has multiple preselection filters, but I noticed only one low pass filter for the 0 to 1.7 MHz range. So a MW band reject filter would be useful for Long Wave with both units. I plan on building an external preselector.

The option for multiple receivers and two RF ranges is pretty neat. I was listening to multiple FM stations at once. This morning I set one range to 31 meters and the other to 49 meters. I listened to Radio Australia on 9580 KHz using the right laptop speaker for audio, and could check their other frequencies on 31 and 49 meters using the left laptop speaker for audio.

I do HF Utility monitoring on digital signals, so I want to setup the Elad software with external decoder software. I have seen reports that the Elad can receive Airband pretty good, so I will also try receiving and decoding multiple ACARS frequencies at the same time.

So many experiment to try this Winter!”

Thanks for sharing your experience, Eric! Since I live in such a rural area, I never have to worry much about low pass filters (though I’m sure they couldn’t hurt). I’ve had the FDM-S2 since June this year.  I can tell you that there are so many features, settings and possibilities with this radio, you could easily spend the winter and spring experimenting. I have yet to use the WinRad app to drive the S2.

Eric, we welcome any other discoveries you make along the way! Many thanks!

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