Category Archives: Reviews

The Professor reviews the Tecsun ICR-110 AM/FM radio recorder

Photo: BigBargainsOnline from eBay

The Professor, over at The Radio Kitchen, has just published an excellent review of the new Tecsun ICR-110: an AM/FM radio with built-in MP3 recorder and player. While the ICR-110 is a little quirky, those of you looking for an affordable AM/FM recorder may find the ICR-110 a cost-effective tool. The price on eBay is $46 US shipped from Hong Kong.

While The Professor is kindly sharing his full review below, I would strongly encourage you to hop over to The Radio Kitchen to read this review, then browse his extensive collection of archived articles. I’m especially fond of his AM radio articles, bandscan recordings and the lost/found sounds he features on The Audio Kitchen. Thanks, Prof!


A Review of the Tecsun ICR-110 Radio Recorder

In a number of ways, the Tecsun ICR-110 is unlike any radio I’ve experienced. The operation is almost too simple. It’s idiot-proof in a way that will please some and frustrate others. At the same time it’s an innovative multifunctional device that works very well. For less than fifty bucks (including shipping from China) you get a sensitive AM/FM radio, an MP3 player and recorder, an amplified hi-fi speaker for your phone or laptop and an external sound card for your computer. The_110Not bad, right?

It’s cool. But hardly perfect. The built-in MP3 player/recorder interface is as primitive as anything I’ve seen. But it does make nice radio recordings. People who gather podcasts online or archive radio shows on their own could find the ICR-110 quite useful. For me it was an affordable impulse buy, but others may find this shiny box practical for any number of reasons. One thought I had: the 110 could easily upgrade or replace someone’s aging AM/FM cassette recorder.

It looks just a bit like the new Tecsun PL-880, but it’s not in the same league. And it’s lighter. Less oblong. While the more advanced electronics in the 880 add heft, both radios beat with the heart of a high-performance DSP radio chip. Don’t expect any of the bells and whistles of the 880 on this one, yet the raw medium wave reception is almost comparable. And they both have a surprisingly warm and rich sound. When you play music at room volume on the ICR-110 the sound is impressive in your hands. It’s more hollow than the 880 and you can really feel it throb with signal.

After playing with this radio for over a week, I like it. I’d even say it’s kinda cute. The display says “HI” when you turn it on, and it comes in three colors. I opted for red. Despite the lack of English on the radio or in the manual, after a little trial and error I felt like I had mastered most of the functionality. And the more familiar I get with the ICR-110, the more I’m starting to think we may eventually see more radios with a similar feature set. And that might not be such a bad thing.

New Toys from the Far East

Through my adventures in translating Chinese web sites, I’ve concluded that the ICR-110 is just one example of a new generation of radios and media players they’re building over there. Most aren’t packaged or marketed for the rest of the world (at least not yet) and Tecsun is only one of many brands in the game. The Tecsun PL-880 seemed to kind of come out of nowhere for many of us in North America, but after taking a look at all of these brightly colored radios and media players being sold overseas it puts some of the wonders of the PL-880 in context.

The 880 quickly earned street cred in the greater SWL community for good reason. It’s a nice machine. Specifically built as the flagship radio of the Tecsun line, the PL-880 is like a greatest hits package of features that have impressed many of us who have handled Tecsun winners like the PL-660 or any of their DSP family of ultralights. With the addition of some contemporary technological frosting, Tecsun has come up with a reasonably priced super radio of sorts for shortwave listeners all over the world. Like anything these days, opinions will vary, but considering the current price tag of just over a hundred and fifty dollars, I challenge anyone to come up with a new shortwave radio in that price range that’s a better deal than the PL-880, or more fun to use.

880-110This creative streak in Chinese electronics is the result of a rash of consumer devices being created to take advantage of the “radio on an IC chip” technology pioneered by Silicon Labs here in the U.S. The development of these DSP processors has made it possible to include excellent radio reception on all sizes and shapes of radios and media players at a low cost.

As the price of flash memory continues to drop, it’s a nice bonus that so many of these new Chinese devices also play MP3 files from storage you slide into an SD card slot. And having the ability to play high fidelity music is greatly enhanced by the trend to integrate an innovative audio chamber into many of these things. Looking through the little holes in the speaker plate, you might notice Mylar diaphragm with a front vent mounted alongside the speaker. First seen on these shores on the Meloson M7, this setup provides a fuller bass and treble response in a small package, with audio that’s less mid-rangy than most portables.

While the PL-880 display is a little brighter and more yellow than the black on orange display we’ve seen on recent Tecsun radios, most of the new ones reverse that color scheme. The ICR-110 and other new Tecsun products sport dark black displays, with all the reception information provided in bright orange text and symbols. Perhaps you heard that Eton here in America is giving their line of shortwave portables a makeover of sorts. Part of their new look will include changing over to this same orange on black display. And no surprise, those radios will be coming from China.

Most radios from that part of the world seem to come with a USB port lately. And although there are more interesting options these ports could provide, so far most are rigged as simple power inputs for charging batteries inside the radio (using either your computer’s USB port or an external AC charger). Instead of using traditional AA cells, a lot of this new gadgetry is powered by Li-Ion batteries, either flat cellphone batteries or those beefy 18650 cells. Many laptops are powered by a few of these, but the ICR-110 and the PL-880 just need one. (Inside the battery pack for the Tesla Model S you’ll find seven-thousand of those things packed together!) Many believe the 18650 will become the standard for the next generation of electronic products. But they’re not your mama’s D cells. If you’re not familiar with these batteries, it’s good to learn their quirks and to know how to avoid having bad things happen. And don’t buy the really cheap ones on eBay.

Good Radio, Weird Tuner

When it comes to purchasing an ICR-110 you don’t have a lot of options. Unless you live in China. At the time of this writing, there’s only one overseas eBay dealer offering it for sale. It wasn’t a vendor I’ve used before, and while the radio did arrive here safe and sound, a few of the pitfalls of buying from China were part of the deal. The English in the emails was a bit mangled. The online tracking was dysfunctional. And it took almost a month to get here.

For a while now, I’ve gotten great service and fast shipping from Anon-Co in Hong Kong. Over the years, I’ve had problem-free transactions with any number of Asian eBay dealers as well, but it’s always smart to do some research and check ratings and feedback before you buy goods on eBay. It seems that most vendors avoid selling Chinese-text radios internationally. But a representative at Anon-Co told me you can inquire via email (at this address) if you’d like to order an ICR-110 directly from them. And they say they’re working on an English language manual for the 110 as well.

110FACEOn the eBay page where I found the ICR-110, the description combined real specs with a sloppy copy-and-paste job from the description of another radio. Despite what I read there, there is no “power/volume knob” on the 110. More significantly, it doesn’t have a “tuning wheel” either. (Come to think of it, you don’t see those power/volume knobs much these days.) The 110 has a power switch on the right side. And all volume adjustments happen via two buttons on the lower right corner on the face of the radio. But oddly there are no tuning controls – only scanning buttons. And a keypad.

It’s not all Chinese on the radio case. The switch marked “AM/FM” is easy enough to figure out. But if you press and hold that button for a second or so, Tecsun’s ATS (auto tuning storage) will kick in and the 110 will scan the band for signals and store them as presets. It works well, most of the time. Using it at night on the AM band, I was impressed by how many REW-FFfringe stations it found. But it often misses one or two. Once ol’ ATS skipped over the monstrous fifty-thousand watts of Radio Disney, which pollutes a swath of the AM band from just a few miles away. Maybe the radio includes some artificial intelligence chip as well.

Under the display, there are five round buttons which primarily control the MP3 player/recorder. However, the rewind and fast-forward buttons also serve as scanning controls. A simple push will nudge the tuner over to the next (or the previous) frequency caught by the last ATS grab (labeling them as CH:01, CH:02…). And if you only punch in one or two digits, the radio will automatically take you to that “channel” in the ATS database. Holding either button down a little longer the radio will scan anew for the next signal strong enough to trigger it to stop searching. But that’s all it will do. Unlike other scanning functions I’ve used, this one has a mind of its own. It may not stop at your favorite weak station it passes along the way. If you are determined to tune to a particular frequency, the keypad will always get you there. Just type in the numbers and you’re listening to it instantly.  Nonetheless, taking away the art of tuning will probably turn off many in the DX crowd, despite the fact that it pulls in a lot of signal.

MODESWITCHESThere are a couple of settings you can actually change. A pair of buttons with Chinese text above the AM/FM button adjust each band for international use . Press the left button while in radio mode and it will toggle to expand the FM band down to 64 MHz (for Russia and Japan) or back to the standard FM band for the rest of the world (starting at 87 MHz). The button on the right changes the MW scanning step. When I got the radio the first ATS scan barely found any stations. Then I realized it was because the step was set at 9 kHz. After an extended session of button pushing I finally figured out how to change the step to 10 kHz, the North American standard. Despite the Chinese characters everywhere, this was probably the only thing about the ICR-110 that wasn’t immediately easy.

A Bare Bones MP3 Recorder and Player

Since the golden age of the radio/cassette boombox, I’ve always been attracted to radios that let you keep what you hear. And there are plenty of digital recorders with built-in FM radios to choose from nowadays. But AM? Not so much. In close quarters, digital audio circuitry tends to broadcast a little noise on medium wave. So in order for the old and new technologies to get along, you need some shielding, or something. For the most part, Tecsun seems to have gotten this right. I’ve gotten nice, clear, AM radio recordings from the ICR-110’s tuner– I’d prefer to be able to set recording levels, but the ALC seems to work well.

After extensive experimenting, I did hear a bit of noise introduced into the ICR-110 while recording weak AM signals. Like a bad spot on a vinyl record, I heard a brief “phhhht” sound come around about every twelve seconds. I’m guessing it might be the sound of data packets being arranged on the memory card. In retrospect, this might have been related to having a low battery. I’ve only heard it happen a couple of times.

While there don’t seem to be any settings for the recording feature, I was really happy to see that it creates MP3 files at a reasonable bitrate (for radio recordings), and not those horrible low-sample rate .wav files or in some annoying and proprietary nonstandard format. (Oh, it’s not an Apple product so we don’t have to worry about that..) It fills the micro SD card with 128kbps stereo MP3 files (which I think are actually dual mono files). Considering that this radio doesn’t seem to tune in stereo, it’s a shame that the recording isn’t mono by default. It encodes using a non-standard sampling rate of 32kHz (instead of 44.1kHz), but that’s not something you’ll notice on a radio recording. Another funny thing, since there’s no way to set the date or time on the ICR-110, you’ll notice when you pull the flash card up on your computer that the MP3 files you’ve recorded have no date stamp. So, if you need to recall when you were making a particular recording you might wanna write yourself a note.

M8In some ways, the ICR-110 is like a slightly larger version of the Meloson M7 or M8, except it also records. Like the Meloson, it gives you a lot of boom in a small box. But it’s a measure bigger so it sounds even better. And like the Meloson, the MP3 playback display is super primitive. All you see is the assigned sequential number for the track playing. But what makes the Meloson a formidable little music player (especially for travel) is that you can fill a flash card up with a few hundred or a few thousand songs and shuffle the whole lot of them for many hours of random fun. As far as I can tell, the 110 will ONLY play the files in order, period. For that reason I think it’s more practical for playback of podcasts or radio shows, unless you have some songs you want to listen to in alphabetical order for some reason.

When you’re listening to an MP3 file and then switch to the radio or shut the thing off, and then resume MP3 playback at a later time, it will start playing the file where you left off. This is a nice feature if you’re in the middle of an hours-long MP3 file (and holding down that fast forward or rewind button to find your place will take forever).

There are other quirks as well. When you’re recording from the radio you can change stations, but only by clicking through the ATS presents. While recording you cannot scan the band up to the next station by holding down the button. And you can’t change bands either. Of course, if you’re recording through the line input you can do whatever you want. And when you stop the recording it immediately starts playing it back to you. And the recording is noticeably louder than when you heard it the first time. It’s almost jarring. When you hit stop, playback ceases and it resumes playing the radio (or the line source audio) at the previous volume.

The ICR-110 treats the files you import onto the flash card differently than the ones you record. When you turn it on or switch to MP3 mode it automatically starts playing the last imported file played. Unless I’ve missed some setting, it appears that no matter what folder structure you’ve established on the card the 110 will simply play through each file on the card in alphanumeric order by path and name. But the recordings made with the radio are stored in a system folder the radio creates named “RECORD0″ (at least that what it’s called on my card). The pair of Chinese text buttons that change the parameters of AM and FM will also switch the MP3 player’s focus from the folders you’ve made on the SD card to the system RECORD0 folder, and back again. When in either mode you can move through the files in those folders by pressing the rewind and fast forward button once. However, when holding those buttons down the player will actually rewind or fast forward (silently) through the file at hand.

I also own another AM/FM radio recorder, the CC Witness. And while they do some of the same things, they’re very different gadgets. The CC Witness is a much smaller and more complex thing. And you’ll pay a lot more for that. You can program it to record up to 20 different radio programs on AM or FM throughout the week, and encode them at bitrates you choose. But the line recording input doesn’t have ALC like the Tecsun. When recording via the line input with the CC Witness, I’ve found it’s better to dampen the felix-bose-110incoming audio with a headphone volume control adapter to avoid distorted recordings. Of course the CC Witness is nice, but everything about it feels very 2003. Not that I mind that at all, but the CC Witness is overdue for an update. My biggest complaint about the CC Witness has been the tuner. They could start there.

The CC Witness came into being when C. Crane smartly transformed a language learning tool called the TalkMaster Slim in Asia into an AM/FM VCR-like tool for all of us. And after spending some time with the ICR-110 I think this radio might have been engineered for a similar purpose.

Apparently in Japan (and probably other countries) language lessons are commonly broadcast on medium wave. A digital AM radio recorder would make a lot of sense for somebody learning a language that way, but if you shop around you’ll discover that there are very few digital devices that include an AM radio, let alone offer you the ability to record AM radio programs. So it’s not surprising that the few gadgets that offer this option might cater to language students. Like the CC Witness, the ICR-110 also has a looping feature.  While playing an MP3 file, you can press the button at the bottom left corner of the keyboard to select the beginning and ending of a chunk of audio and the radio will play it back ad infinitum, for pronunciation practice or mind control. Whatever works. But it’s not like the voices in your head. When you press the stop button, the repetition ends. Once I discovered this feature, it made me think that the odd instant feature (when you stop an ongoing recording) is probably related to language acquisition as well.

A Radio, A Sound Box

And lastly, the ICR-110 is a fine speaker for your phone or your laptop, or anything really. It’s certainly portable and has a warm, full sound. All it takes is a 3.5mm patch cord inserted into the outlet above the headphone jack. The display will read “LINE’ and the speaker will emit any audio coming through that cable. However, like some of the other new Tecsun radios, the ICR-110 is different than radios we’ve seen before. When you connect the radio with the 110manualgrab02USB port on your computer it does more than just charge the battery. You’ve also probably just added an external sound card to your computer. When this is occurring you’ll see “PC” on the display.

I didn’t have much trouble navigating this, but depending on how your computer is set up (and your understanding of how it is set up), suddenly having another sound card may be problematic. I’ve used any number of external sound cards with computers over the years and when you attach and detach those things you may temporarily lose sound or change some settings. But if you were to use the ICR-110 as your primary computer speaker this could be an ideal scenario once you get it set up, with just one cable between the radio and the computer providing both the sound and power to the speaker.

I must say, other than that I haven’t really figured out what real advantages there might be to having the ICR-110 become a separate USB audio device when you plug it in. One thing I did notice: when connected to the computer USB, I hit record on the radio, and much to my surprise it recorded me. I don’t know where the microphone is hidden on this thing, but it’s there somewhere. Again, this feature may be related to using the 110 as a learning tool.

Perhaps there are more hidden settings on this thing, like all the easter eggs found on PL-880. But I kind of doubt it. I’ve tried holding down numbers of the keyboard and such, but nothing special seems to happen. 110manualgrab01And I wouldn’t be surprised to see the MP3 playback and recording features of the ICR-110 added to a future version of the PL-880.

As I mentioned, the ICR-110 is just one example from a new wave of Tecsun radios and media players. You can find this radio’s FM-only little brother, the ICR-100, on eBay, but you can take a look at the family of new Tecsuns here and here. And if twenty years of Tecsun radios has shown one consistent trend, I think it’s safe to say that you’ll see some of their new line of gadgets re-branded (and perhaps transformed a bit) for international distribution, and ultimately bearing logos like Eton, Kaito, C. Crane or Roberts. Or maybe some Radio Shack nameplate.

Bottom line, many of these new Chinese gadgets offer great sound and decent radio reception at a good price. They’re fun to carry around and I don’t remember portables ever sounding this good. The ubiquitous flash card slot and MP3 playback seems like something that’s been a long time coming. As flash memory gets cheaper every day, one of these players and a packed memory card offers a world of high-fidelity music that fits easily in a knapsack, or even a pocket, at a price a pauper might afford. But the MP3 interface has got to get better. RockBoxThe displayed information and the choice of settings for these MP3 players (and recorders) on these devices is a far cry from all the playback options and ID3 tag information you see on devices from Apple or SanDisk, or with almost any contemporary digital audio player.

I’m a big fan of Rockbox, the open source alternative firmware for digital audio players. Over the years I’ve installed it on dozens of MP3 players, making them more versatile and more fun to use. And if the idea of being able to tweak and perfect your player beyond the stock settings sounds appealing, you might wanna check out their site and see if they’ve adapted Rockbox for your device. A few years ago SanDisk famously sent some Rockbox developers one of their new players at the time to help them reverse engineer their hardware. I wish Tecsun would do the same thing. A marriage of the Rockbox firmware, with over a decade of creating a highly stable and adaptable audio playback firmware, together with these handsome and innovative radios, would be a real technological game changer. And who knows? Maybe some of those old and tired electronics titans like Sony or Panasonic might actually wake up and start making innovative radios for this century for a change.

card110The predictions of the demise of over-the-air broadcast radio have always seemed a bit overblown to me. Maybe once they give every paper clip and bone in your body a URL, we can just surrender to that surging internet everywhere spirit and do everything online. Until then, the old AM/FM technology works fine (and it’s nice to consume media without logging in). This DSP technology paves the way to keep terrestrial radio around as one choice of many in our media landscape for a while. Sure, there are good arguments to be made that the programming on AM and FM is overdue for new thinking, but there’s plenty of dreck streaming on the web as well.

The truth remains– the old technology is stable, practical and proven. Why not improve it and make it more available, instead of trashing it? And why not include SD card slots on every kind of media player out there? Years ago when technology was in flux, we bought converters to dock to our radios and televisions so we could receive FM in our cars and UHF stations in our homes. But soon all those tuning options were built in. So after over a dozen years of fastening iPods and smart phones to the stereo, isn’t it time that our listening experiences have to include docking little gadgets to bigger ones?

And perhaps, in between listening to their favorite songs and podcasts, people might turn the radio back on every once in a while. Just for fun.

(This review originally appeared at the Radio Kitchen)

Spread the radio love

Dietmar compares the Tecsun PL-310ET to the Icom R-71A

Image Source: Anon-CoSWLing Post reader, Dietmar, writes:

“I recently saw a YouTube video that demonstrated that the new Tecsun PL-310ET has better reception than the previous PL-310 that you reviewed [see video below].

I purchased the PL-310ET for $50 (incl. shipping) from Anon-Co and received it from Hong Kong in less than two weeks. Anon listed the PL-310ET as their #1 selling item at the time of purchase (PL-660 was #3).

The PL-310ET now has the very useful ETM. I am quite impressed with the radio’s reception. Basically, I could listen to the same radio stations that I could get with my 20+ year old ICOM R-71A. However, the Tecsun’s sound quality was considerably better. The ICOM had a slight edge with interfering stations in a few cases.

When comparing radios, I used the Tecsun with its telescope antenna and the ICOM with an indoor Palomar shortwave loop antenna with range from 5000 KHz to approx. 17000 kHz.

The PL-310ET also has external antenna input and can charge NiMH batteries.

I consider the Tecsun a great bargain considering what I once paid for the ICOM.”

Many thanks for your thoughts on the PL-310ET, Dietmar! I may just pull the trigger on a new PL-310ET. Perhaps it could replace my PL-380 as a travel radio. I’m curious if its dimensions are any smaller than the PL-380 and if it mutes between frequencies when band scanning.

Anyone else have thoughts about the PL-310ET?

I believe this is the comparison video Dietmar was referencing:

Click here to search eBay for the Tecsun PL-310ET.

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Mechanically-tuned portable DSP radios: a shootout

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:

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2014 WRTH: A look inside

wrth-2014I received my copy of the 2014 World Radio and TV Handbook (WRTH) directly from the publisher a few days ago, just prior to a 24 hour power outage.

As many SWLing Post readers know, I always look forward to receiving this staple radio reference guide each year. While other reference guides have dropped out of the scene, WRTH has remained strong, somehow resistant to the economy’s negative influence upon radio–and the publication’s quality has been wonderfully consistent. It’s no wonder that WRTH has a loyal readership–not only among hobbyists, but also among commercial broadcasters, thus giving it a much broader reader base.

WRTH’s team of noted DXers from around the world curate frequencies and broadcaster information by region; while I’m not sure how they orchestrate all of this, the end result is truly a symphony of radio information. In addition to broadcaster listings, WRTH’s radio reviews, feature articles, and annual HF report make for excellent reading.

But the WRTH isn’t just a frequency guide: the publication always devotes the first fifty or so pages to articles relating to the hobby. Following, I offer a quick overview of these.

The first article always features a WRTH contributor (indeed, it’s this very network of contributors that make WRTH and its listings such a success):  this year, writer Max van Arnhem tells us how he got interested in the hobby and what being a contributor means to him.

FunCubeDongleProPlusThe second set of articles is always my favorite: WRTH receiver reviews. And the review in this issue is no exception. This year, WRTH reviewed the CommRadio CR-1 (which won their Best New Receiver award, and, I was pleased to see, received many of the same good marks I gave it).  They also review the FunCube Dongle Pro+ (above), the new AOR AR6000, the WinRadio Excalibur Ultra (spoiler: the reviewers say it’s the best they’ve ever tested!), the AOR AR8200D handheld receiver, and the YouKits FG-01 Mk II Antenna Analyzer. As I’ve come to expect from this publication, these are all great comprehensive reviews.

The following article is “The History of Shortwave Broadcasting in a Nutshell,” written by noted radio historian and author, Jerry Berg. In just a few pages, Berg takes you through the remarkable history of shortwave radio broadcasting.

SriLankaMap-SM

Following this, noted DXer and WRTH contributor, Victor Goonetilleke, offers a fascinating article focusing on broadcasting on his home island country of Sri Lanka. It’s a enlightening overview of some of the changes that have occurred within the Sri Lankan broadcasting scene (DXers and SWLers will likely recognize many of the stations Goonetilleke mentions).

Voice-Of-VietnamWRTH always highlights a radio broadcaster as well, and this year, it’s the Voice of Vietnam. Despite my many years of hearing VoV on the air, I did not realize how deeply involved they were during the Vietnam War (which took place when I was a kid). The station today prides itself on responding to QSL requests and listener comments.

The final sections of articles are dedicated to the WRTH digital update–this year’s subject is “Digital Future“–and their HF propagation report/forecast.

In summary, this is another great edition of the World Radio TV Handbook. As I’ve said many times, though I use online frequency databases fairly regularly, there is just no replacement for a good printed frequency guide. For DXers who collect QSL cards, you’ll find that broadcaster contact information in WRTH is often more up-to-date than a broadcaster’s own website.

Not only does WRTH contain more in-depth information on broadcasters and schedules, but it makes for quick reference, and doesn’t require a computer or Internet connection–much like, well, your shortwave radio.

Purchase your copy of WRTH 2014 directly from WRTH’s publishers, or from a distributor like Universal Radio (US) or Radio HF (Canada). Happy reading–and listening–in 2014!

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CommRadio CR-1 and WRTH: Power outage essentials

20140107-092801.jpg
Like much of North America, we’re currently experiencing record low temperatures and strong winds here at our mountain home. This morning, I woke to no power and no Internet. My iPhone still works though, hence the ability to publish this post.

But no power is really no problem when it comes to SWLing. Indeed, for those living in urban areas, power outages represent temporary refuge from all of those electronic noises (RFI) that plague daily listening.

I’ve spent the morning SWLing with my CommRadio CR-1. The beauty of the CR-1 is that it can operate for hours on its internal battery and can also be charged/powered via USB or anything from a 6V to 18v DC power source. I’m currently charging the CR-1’s battery from our solar-powered battery bank. It makes me realize that the CR-1 is an ideal, top-shelf radio for off-grid DXing.

Additionally, I received my 2014 WRTH yesterday in the post. The WRTH is always a welcome delivery, but this morning was even more appreciated since it requires no power source whatsoever to work!

No power? No worries! With a WRTH and CommRadio CR-1 combo, I’m a happy listener!

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The sixth edition of The Worldwide Listening Guide

wwlg-2013-cover-webI’m very pleased to have just received the 6th edition of John Figliozzi’s Worldwide Listening Guide (WWLG). This is the latest updated version of the guide I reviewed last year.

As I said then, you may want a copy of the WWLG in your shackand, may I suggest, next to your computer or wi-fi radio.

SWLing Post readers know that I’m a huge fan of the Word Radio TV Handbook (WRTH)–it’s my go-to guide for radio frequencies–and Figliozzi’s Worldwide Listening Guide is my helpful companion for programming and for content.

Figliozzi exhaustively curates more than 4,000 programs, indexing their airing times, stations, days of broadcast, program types, frequencies, and web addresses. He also sorts the programs by genre:  from arts, culture, and history; to music, sports, and more. In fact, he has a well-thought-out directory of at least forty genres–this directory has helped me locate programming about which I would otherwise have never known. Want to find jazz and blues programming, or shows focusing on sports?  This book’s got you covered. Frankly, I’m not sure how Figliozzi manages to curate such a vast assortment of programming, but I’m happy he does, and that he offers it for our benefit!

Figliozzi even dedicates a section of his book to “The Big Six” English language broadcasters–namely, NPR, BBC, CBC, ABC, RTE and RNZ. These networks are widely regarded as the best in the business, with audience numbers to back this claim. The WWLG dedicates several pages to describing the structure and programming diversity of each, with listening tips and more.

I’ve always liked the WWLG, and it has become a permanent reference book in my shack, alongside my trusty WRTH. There is a surprising amount of information packed into this slim, spiral-bound book…enough to keep even a seasoned DXer contented for years.

The 6th edition of Worldwide Listening Guide can be purchased here:

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Important note about Tecsun PL-880 firmware versions

Click here to learn how to display your PL-880's firmware version.

Click here to learn how to display your PL-880’s firmware version.

It seems that there are some important differences emerging between PL-880 firmware versions.

You may have noted that the PL-880 I reviewed yesterday has a firmware version of 8820. I purchased my PL-880 through eBay seller, Anon-Co. As far as I can tell, most, if not all of the units Anon-Co has sold have the same (i.e. latest) firmware version: 8820.

Several readers have contacted me with concern about units they’ve purchased from Kaito Electronics and from their Amazon.com vendor account Electronnix which have firmware version 8819. (Not sure what firmware version you have? Click here to discover.)

It seems that firmware version 8819 lacks a few features that I mentioned in the review I posted yesterday:

  • The muting threshold cannot be properly adjusted as I describe in this post. To be clear, this would lead to a very annoying and constant shift in audio level while listening to all but the strongest of AM/SW signals. I would recommend returning your PL-880 if the muting threshold cannot be adjusted.
  • Bandwidth cannot be adjusted using the tuning or fine tuning controls. You can only cycle through filters by continuously press the AM BW button.

It also seems that Kaito’s PL-880s are not shipping with the same carrying case Anon-Co ships.

On a side note, I don’t think Kaito is to blame for this as they probably had no idea there were different versions of the PL-880 firmware. I’m sure they will work with their customers to correct this.

If we found that the PL-880 firmware could be updated by users it would eliminate this problem.  So far, I have not heard that this is the case.

Please comment if you notice other differences in firmware versions and I will amend the list above.

You can follow all Tecsun PL-880 updates by bookmarking/checking this link.

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