Category Archives: Shortwave Radio

Hamfest find: Griffin Technology PowerMate Controller

A few weeks ago, I attended the WCARS hamfest in near Waynesville, North Carolina. I walked out of that hamfest carrying way more goods than I had intended to purchase (more on that in a future post–!).

One of the best bargains I found was a Griffin Technology NA16029 PowerMate USB Multimedia Controller. The seller is a friend; he was trying (and succeeding) to push off a lot of his gear on me. We were actually in reverse price negotiations at one point–as he kept discounting prices, I was trying to raise them.

Knowing I’m an avid SDR guy, he insisted I give this Griffin Powermate controller a go. I purchased it for $5 after I believe he had offered it for free (yes, the results of reverse negotiations).

I took the controller home assuming it would be cumbersome to interface with my SDRs–what a poor assumption I had made! It was a breeze: simply install the driver, and launch its associated application. The software makes it very easy to associate PowerMate controller actions with keystrokes and other PC functions.

There are a surprising amount of functions this simple knob performs:

Rotate clockwise and counter clockwise
Press down and rotate clockwise and counter clockwise
Press down once
Press down and hold

I set up the PowerMate to control my WinRadio Excalibur as follows:

Press and hold launches the WinRadio Excalibur application
Rotating the knob tunes up and down
Pressing down and rotating increases and decreases bandwidth
Pressing once toggles the volume mute

The PowerMate is a brilliant piece of kit!

It has enhanced my user experience with the Excalibur. Soon, I’ll set it up to work with my Elad FDM-S2, and SDRplay RSP.

The PowerMate software allows you to set up multiple configurations, so it’s easy to call up a configuration based on the SDR being used (since mine have unique hotkeys).

The good news is a new PowerMate is only about $32 via Amazon.com.

I’m quite tempted, in fact, to buy a second unit to use with my laptop and to serve as a spare.

While looking up PowerMate pricing, I noticed more complex multimedia controllers on Amazon; I’m curious if any Post readers have experience with other models.

Seems to be a very affordable way to enhance your SDR user experience.

Click here to view the PowerMate on Amazon: http://amzn.to/1MmyxkC

DSP noise may come from clock and data line harmonics

3 Replies

In response to our review of the Sangean ATS-405–which noted DSP noises on 800 and 1600 kHz–SWLing Post reader, Steve Yothment, comments:

“Yes, modern radios usually have a micro communicating with the DSP IC through I2C communications.

The inter-IC communications includes a clock and data line. The clock for I2C is typically 400 kHz nowadays. Harmonics from this clock line are probably the source of the interference.

The manufacturer should have designed the product to ensure that this interference does not occur. It may be that they resolved it at one time but with limited manufacturing quality and component substitutions that often occur in mass production, the problem is occurring now even though it may have looked OK earlier in development. At least, that is my experience with such things. (I used to design car radios for the Panasonic Company.)

You can learn more about the I2C bus at https://en.wikipedia.org/wiki/I%C2%B2C.

Many thanks for your comments, Steve! I recall a similar metronomic sound on another DSP-based radio, but can’t remember which model. I need to dig through my reviews as I’m sure I noted this. I believe checking 400, 800 and 1600 kHz will become a standard checklist item when I review DSP-based radios.

Winner of the Virtual Radio Challenge III

1 Reply

Dennis Blanchard (K1YPP), author of Three Hundred Zeroes: Lessons of the Heart on the Appalachian Trail, recently contacted me from the road, en route to another lengthy trail in Vermont.

Before this latest hiking expedition, Dennis spent many hours pouring over the Virtual Radio Challenge III entries, looking up weights and specifications of radio gear and accessories…And the upshot? He’s chosen a winner of our Reader Challenge.

Again, in summary, a participant’s goal was to find the best and most portable radio gear to receive shortwave, AM (medium wave), FM, and NOAA weather to support a long through-hike on the Appalachian Trail, to plan each day’s hike, and to make accommodations for frequent spring and summer thunderstorms (as well as occasional spring snow or sleet)…all for a budget of $300 US. [Read full details of the Challenge by clicking here.]

This year, Universal Radio rewarded–and has already dispatched!–a brand new CountyComm GP5/SSB portable receiver to the winning entrant.

Below are Dennis’ comments, along with those of the Challenge winner.

Dennis Blanchard (K1YPP) writes:

“This photo was taken in NJ. Shortly after I took these photos, and walked down the trail about a 100 feet, a bear came over to check the table to see if I had left anything.” (Photo: K1YPP)

Dennis Blanchard operating a portable radio on the Appalachian Trail. (Photo: K1YPP)

I’ve just spent about five hours going over the entries. There are several that are very good…indeed, Challenge participants obviously put lots of thought into their entries.

It was really tough to decide, but I had to go with most practical.

Weight is a big consideration for me, and that leaves out solar panels, hand crank generators, and the like.

What most don’t realize is that the AT has a nickname: “The Long Green Tunnel.” This eliminates solar panels because there is little sun to be had, as you’re in the shade most of the time. By the time you get to camp it is usually too late in the day for any charging, and wearing a panel just doesn’t do any good because of the shade (and weight).

Not only is weight an issue, so is space in the pack…hikers need all the room they can get for food, and in the cooler weather, heavy clothes.

Anyway, out of five finalists, I would have to go with Eric McFadden (WD8RIF).

Eric’s winning entry

So, what did Eric choose? The following is Eric’s winning entry, beginning with his radio choice and following with a clear, practical explanation for it:

C.Crane CC Skywave, AM/FM/SW/Air/WX, $89.95 at Universal Radio

Sangean ANT-60 Roll-Up 23′ Antenna, $12.95 at Universal Radio

Energizer L91 Ultimate Lithium Cells, AA, 12-pack, $17.45 at Amazon

“The C.Crane Skywave is small (4.75″ x 3″ x 1.1″); light (5.5oz); power-stingy (30mA with headphones); and receives AM, FM, SW, NOAA Weather, and VHF Aviation.The Skywave runs on two AA cells, and comes with a case and CC Earbuds.

The Energizer L91 Ultimate Lithium AA cells provide 1.5v at approximately 3000m Ah, weigh 1/3 that of an alkaline AA cell, and last several times longer than an alkaline cell.

The Sangean ANT-60 would be tossed over a handy tree-limb and clipped to the Skywave’s whip antenna when the Skywave’s built-in 16″ whip isn’t quite adequate for listening to a shortwave broadcast station.

The purchase price of the Skywave, six pairs of Ultimate Lithium AA cells, and ANT-60 would be about $121 plus shipping, well under the $300 limit. The entire station should be small enough and light enough for easy carry in a backpack. If the twelve Ultimate Lithium AA cells don’t last the entire hike, enough of the budgeted $300 remains to purchase more cells (either Ultimate Lithium or alkaline, as available) along the route.”

To this sensible explanation, Eric adds:

“Being a ham radio operator, I’d want to have a ham rig along, too. While I’d love to be able to operate HF CW along the AT, my Elecraft KX3 is too large and heavy to carry that far. However, my current Yaesu FT-60R 2m/70cm HT and Diamond SRH77CA whip should travel nicely clipped to a backpack strap and would serve as a back-up receiver for NOAA Weather and be available for pedestrian-mobile QSOs (chats) and calls for help, if needed.

In order to save weight and not have to hassle with charging batteries, I’d leave the NiMH pack at home and carry the FBA-25 six-cell AA holder and stuff it with additional Energizer Ultimate Lithium cells in order to save weight.

Since the C.Crane Skywave already meets all the requirements of the Virtual Challenge, and since I already own the HT, battery holder, and antenna, I won’t consider the cost of the HT, antenna, and batteries as part of the challenge.”

About Eric’s entry, Dennis notes:

Eric’s solution is small, lightweight, and does everything needed. He speculates that he would also bring along his Yaesu FT-60R, but didn’t feel he could include it because of cost. Curious, I looked it up on Amazon; should he take it along, this addition would still keep his total well under the $300.00 limit.

This would provide Eric with two receivers, [the ability to enjoy] ham radio communications, and not much weight to haul. He includes the AA Lithiums, and I have to say that, without a doubt, these are the finest hiking batteries out there: they’re light, last forever, and are readily obtainable. I only had to change mine out once on the entire, six-month AT hike, and I was on the air a lot.

Several of the other entries were winners also great; I basically had to use a dartboard to pick a winner. Good thinkers out there, especially considering none of them have actually ever done a hike of this magnitude.

Congrats, Eric! Thanks, Dennis! And more to come…

Congratulations to Eric McFadden for such a well thought-through entry!

I must say, I don’t envy Dennis in making this selection: it was obviously a challenging process on his end, too, and I’m glad I didn’t have to make it!

Dennis informed me that he plans to post and comment on some of his favorite entries in a few weeks, once he completes this latest multi-week hike. We will, of course, post his comments along with the finalist entries.

Note that when I originally received the reader inquiry which prompted the idea behind this Reader Challenge, the CC Skywave had not yet entered the market. Yet several of you chose it as your sidekick for the Appalachian Trail; clearly, clever minds think alike. Obviously, a radio that would function well on the Appalachian Trail would also be a great radio for your BOB (“bug out bag”), go kit or emergency supplies.

Thanks again to Dennis Blanchard, our intrepid judge, thanks to Universal Radio for the great prize, and many, many thanks to all our Reader Challenge participants, who made this process even more exciting and challenging! Meanwhile, don’t worry if you didn’t win the CountyComm GP5/SSB this time; we’ll soon have another opportunity to win one of these handy rigs in a completely different–and fun!–way.

A repair story: Vlado’s fix for the classic Sony ICF-SW100

56 Replies

In June, I made a small leap of faith and purchased a (dead) Sony ICF-SW100 from Universal Radio (see the listing on right).

ICF-SW100-Used-NonWorking You see, for many years, I’ve dreamed about owning this wee little receiver, now a classic among tiny radios, but used ones are typically too expensive for my modest budget.

This time, seeing the ad at Universal, I spoke with Universal Radio directly to obtain more details about their defunct unit; while they simply didn’t know what was wrong with the Sony, they were able to very accurately describe its cosmetic and functional condition…I took a deep breath, and decided to take a chance on it anyhow.

In full disclosure, I have a secret weapon in my camp: my talented friend, Vlado (N3CZ), who is not only the most adept electronics engineer/technician I’ve ever known, but one who truly welcomes a challenge. The thought had occurred to me as I admired the wounded Sony, Wonder if Vlad would like to take this on–?

The answer, of course, was Yes! So I dropped the DOA Sony off at Vlad’s home last week. He disassembled the radio, only to discover that my ICF-SW100 was a victim of the (dreaded) damaged ribbon cable.

A short history of the Sony ICF-SW100 and SW100S

These radios are indeed brilliant, incredible performers for their miniscule size. Yet the first generation of ICF-SW100 radios–those produced before the fall of 1997–have a design weakness: the ribbon cables which connect the upper and lower portions of the radio’s clamshell design eventually fail. Multiple openings and closings bend and cut the cables, rendering the otherwise remarkable little radio useless.

SWLing Post contributor, Dan Robinson, recently shared his knowledge about the ICF-SW100 series. Dan notes:

SW-100 Seekers Beware

As shortwave veterans know, the classic SONY miniportables — SW-1, SW-100(S) and SW-07, represented some amazing technological achievements. SONY managed to shrink some fantastic technology into these receivers, including (with the last two in the line) — SYNC capability. The SW-07, which was the last of these receivers, still brings some high prices on Ebay.

But if you are searching for the ICF-SW-100S there are some things to consider and beware of. As everyone knows, the SW-100 suffered from the well-known ribbon-cable failure problem. SONY addressed this problem in later serial numbers, and changed the design of the radio case.

Modified SW-100s have a notch where the top cover meets the base.

There are some dishonest sellers out there who are trying to pass off older version SW-100s as modified ones. Usually, the tip-off is that the photograph in the Ebay auction will be dark or out of focus, so it’s hard to tell if the radio is the modified version or not.

It has become quite rare to find an original SONY modification kit, which includes a new top cabinet of the SW-100. And some sellers are trying to get as much as $300 for these, though they rarely sell at this level.

This repair kit was on eBay at time of posting.

ICF-SW100 modification kit found on eBay at time of posting.

It’s also becoming rare to see SW-100S radios new-in-box. I had two of these, sold one and kept the other.

If you’re after one of these marvel radios, do what everyone should do when considering items on Ebay — ask many questions about [the] cosmetic condition, accessories, serial numbers, etc.

Universal Radio, a trustworthy seller I know, had fully disclosed the model number and problems with this radio, so I knew exactly what I was buying. Dan has a very good point, though: unless you know the seller to be honest, do your research and ask questions!

The ailing ICF-SW100

Vlado discovers the faulty ribbon cable (click to enlarge)

Back to my ailing unit: Vlado delivered the news about the ribbon cable via text message, and though I was well aware that the chances were high that was the ribbon cable, I was a little bummed, to say the least, to get the formal diagnosis.

Why? As Dan mentions above, you’ll find that the SW-100S upgrade kit Sony produced in the 1990s is no longer available new; sellers typically list these kits at prices in excess of $300 US. Out of my budget.

But Vlado, ever the intrepid engineer, had no idea I would be disappointed with this news; he was just giving me this FYI via text. Indeed, he seemed entirely unfazed, as in, hey, no serious internal damage here…

Another hour passed. Then came another message from Vlad; this one simply said: “Call me.”

Oh no, I thought. But I called, and Vlado answered cheerfully, “Hello? Tom, is that you? Sorry, I can’t hear you very well because your SW100 is playing too loudly. Hang on–let me turn the volume down!”

Vlad installs the replacement ribbon cable (click to enlarge)

“What!?!” I responded, in utter disbelief.

Yes, he’d got it working! It seems that Vlad had unearthed an old DVD player in his garage that he’d kept merely for parts. He opened it up, identified a ribbon cable with the right pitch, then cut and folded the cable to fit into the SW100. Ingenious!

That’s Vlado for you!

And should I be interested in replacing this used cable with a new one–or in repairing other Sonys–Vlad directed me to eBay listings for new cables which only total about $20, shipped. Truthfully, I’m in no hurry, as this one is functioning perfectly and changing out the ribbon cable seems to have no effect on stored memories, etc. With a single affordable eBay purchase of multiple cable sets, it occurred to me that Vlad would have enough replacement cables to repair the SW100 many times over…

So I bought the cables. (This one for the narrow cable and this one for the wider one.)

My “new” Sony ICF-SW100

Needless to say, I’m very pleased with my “new” (to me) SW100. It’s a little masterpiece of receiver engineering in such a tiny package. And since the ICF-SW100 is unquestionably the smallest portable I own–and is one of the few I own with a proper line-out jack–it may very well become my go-to radio for one bag travel.

It’s in the bag: listening to the ‘SW100 before I pack it for my next trip!

Stay tuned the review…

Vlado’s radio E.R.: the doctor is in

As I’ve said, Vlad is one of the most adept repair technicians I’ve ever known. At my prompting, he’s kindly agreed to let me promote his services here on the SWLing Post. Vlad acknowledges that he “likes a challenge,” adding that he enjoys nothing more than making repairs even when”parts are scarce” and radio”surgery” is required. Moreover, his bench fees will be quite reasonable, especially considering what you receive: new life for a failing radio. So, if you’ve got an ailing rig on your hands, and don’t mind waiting for Vlad to get to it, send it to his radio emergency room, where radios (like my Sony) have life breathed back into them once again.

Long live the Sony ICF-SW100! And long live Dr. Vlado, who makes this possible with his creative (and nearly miraculous) repairs.

To contact Vlad, simply contact me with a description of your radio and its problem and I’ll put you in touch with Vlado.

The SDRplay RSP now has gapless coverage

5 Replies

Jon Hudson with SDRplay has just informed me that they’ve released the latest version of the SDRplay RSP’s API and EXTIO which, among other things, removes the previous frequency gap between 380 MHz to 420 MHz. This is brilliant news for those of you who need continuous coverage from 100 kHz to 2 GHz.

RSP owners can download the new API and EXTIO on the SDRplay website.

Click here to read about other improvements, included with this API/EXTIO update, on the RTL-SDR blog.

Click here to read our recent review of the SDRplay RSP.

Update: Sangean ATS-405 review

8 Replies

After publishing my initial review of the Sangean ATS-405 on July 25, I contacted Sangean and requested a sample radio for comparison purposes. Back story: there were some receiver performance issues that I suspected may have been tied to my particular ATS-405 unit. Sangean kindly dispatched another ATS-405 which I received last week. The following is an update to my initial ATS-405 review.

In truth, there were two main reasons I wanted another unit to compare to my initial review radio:

I wanted to see if the new unit showed improved performance–sensitivity, selectivity, and, specifically, noise floor–in comparison with the first review unit tested
I noted strong DSP “birdies” (noises) on 800 and 1600 kHz on the test model, while several of our readers commented that their ‘405s did not feature birdies

Shortwave sensitivity/selectivity and noise

I noted in my initial review that the initial ATS-405 had an ever-present noise, a sort of low-volume static hiss. The noise floor, while not high, certainly seemed to be higher than other comparable shortwave portables, and was most noticeable when tuned to marginal/weak stations. I suspect many listeners may not notice it unless they compare it with other portables.

Fortunately, my new review unit’s noise floor seems to be slightly lower than that of my initial review unit. [Perhaps this unit’s board is better soldered–?] The noise is still there, but can be better mitigated by judiciously using narrow filters and the three-position audio tone control.

I suspect this is a noise somewhere in the audio amplification chain, because I find it less noticeable with headphones, and more pronounced via the ATS-405’s internal speaker.

In terms of sensitivity and selectivity on the shortwave bands, I believe my new unit is identical to that of the initial review unit. That is to say, the ATS-405 is not an especially sensitive shortwave receiver, but fairly average, and thus will fit the bill for most but not for the discriminating weak-signal hunter. Frankly, even my $46 Tecsun PL-310ET does a better job of pulling in weak stations.

I’ve tried tinkering with the AGC settings and soft mute–very cool features!–in an attempt to improve sensitivity, but alas, these only help the quality and stability of the received signal.

Birdies

Immediately after opening the box of the new ATS-405 sample, I popped in a fresh set of AA batteries and tuned the Sangean to 1600 kHz AM. [If you read my initial review, I noted a strong DSP birdie on 1600 and (to a lesser degree) on 800 kHz].

At first listen, I was happy to note that the new unit lacks the wild DSP noise that overwhelmed my favorite local station on 1600 kHz.

As I listened more carefully, though, I did note a metronomic “chick” sound that was also present but partially buried in the noise on my initial ATS-405.

Below, I’ve embedded audio comparing the two receivers:

Initial review unit:

New review unit:

Listening to these samples, I realize I may have had the filter set to the middle position on the first sample and the wide setting on the second (hence, the brighter tone).

To further demonstrate the difference between the two, I made this short video; I start with my initial review unit, then switch to the new review unit provided by Sangean:

Note that this was recorded at least 100 feet from my house on the tailgate of my pickup truck. DSP birdies on 800 kHz sounded very much like the 1600 kHz sample, save the noise level on the latter is slightly lower and there are no broadcast stations in the background.

None of my other portables have digital noises or birdies on 800 and 1600 kHz.

So, the bad news: I do still hear a noticeable (and slightly annoying) internally-generated noise on the new review unit. The good news: it isn’t as objectionable as that on my initial review unit.

Summary

In short: I stand by my initial review of the Sangean ATS-405.

While the new ‘405 review sample seems to perform better than the initial ‘405 sample, I find the discrepancy somewhat marginal, especially since I spend the bulk of my time on the shortwave and mediumwave bands.

I’m not a fan of production runs where units vary so greatly from one to another, making accurate testing difficult. Therefore it’s quite possible you might receive a unit that performs better than those I tested…but unfortunately, the opposite is also true.

So, if you’re a Sangean fan, if you don’t mind the birdies on mediumwave, and if you mostly listen to strong shortwave stations, you may entertain purchasing an ATS-405. The keypad layout is almost identical to previous Sangean models.

To be clear, of course, this radio’s negatives above have been viewed under a microscope; the ATS-405 is not a “bad” receiver, it’s just not that exceptional. Other than the added mute/AGC/squelch features, when compared to its predecessors, it’s really not a better iteration.

In conclusion? For the $90 US price, I believe there are better receivers out there–such as the Tecsun PL-600 (which, as a bonus, has USB/LSB reception–and saves you $10, to boot).

Radio Serbia International recording and final farewell

4 Replies

Many thanks to SWLing Post reader, “Mutezone,” who writes:

“I want to share a link to a video of Radio Serbia International’s English service recorded on the 4th of July 2015…

[…]I have been monitoring for RSI during the last week of July but got nothing. I have also been monitoring 6100 kHz after the July final date of transmission as according to RSI’s website, there are “Pirates stalking Serbian short wave” due to the termination of the station. However I have not received any odd transmissions on this frequency at the moment.”

Thanks for sharing this recording/video and, especially, for capturing RSI’s interval signal.

I was unable to hear RSI’s final broadcast on July 31, 2015.

If any SWLing Post readers managed to record RSI’s final broadcast–in any language–please contact me so we can add it to the Shortwave Radio Audio Archive.

Regarding the end of Radio Serbia International (or International Radio Serbia), the following final post was published on their website. I’ve included the full note, for archival purposes, in case the RSI website goes offline in the future:

The End of Radio Yugoslavia – International Radio Serbia

Thanks for sharing the recording and for including a few minutes of the RSI interval signal. RSI was always a difficult broadcaster for me to catch here in North America, though I heard them a number of times via the University Twente Web SDR.

Dear friends, Radio Yugoslavia – International Radio Serbia, ceases to exist on 31 July 2015. For you, our faithful listeners from all over the world, and also for us who have worked on this radio, the only consolation would be the fact that this only state short-wave station in Serbia, which has existed for 79 years, will be remembered as an efficient and reliable promoter of Serbia worldwide. No one has ever presented valid reasons why this media, of rich tradition, range and staff potentials, and with big plans until yesterday, should cease to exist. Unfortunately, the assessments not based on arguments were louder than serious analyses and recommendations of experts, professionals and numerous listeners that the world radio service is necessary for Serbia, that it presents the country worldwide in the best manner possible and that no serious state will renounce such an effective diplomacy.

Our significance has been confirmed by the letters of thousands of listeners from all over the world. Some listened to us because of our information programmes, some because of economic topics, while many got to love our country, Serbia, because of its tradition, beautiful and interesting landmarks and the rich heritage they were acquainted with by listening to International Radio Serbia. Regardless of your affinities, you have all told us that you were listening to us because of our objectivity and the possibility of hearing us at any time and everywhere, for such is the power of short waves.

The Serbian government, however, believes that the closing down of Radio Yugoslavia – International Radio Serbia – is a justified move. Regardless of the fact that the state of Serbia is in an economic crisis, that each saved penny is precious, that many citizens have been rendered jobless, that new work positions should be opened, it has become unclear to the very end why the only state short-wave station has suddenly become too expensive after 80 years. We are, however, certain, that Serbian citizens, taxpayers, who have financed us for all these years, would have decided differently had they been asked to.

What remains, after all, is the pride we feel because of the history of our radio as well as the hope that the voice of Serbia will reach our listeners wherever they are.

Thank you, dear listeners from all over the world, for having trusted us all these years! Radio Yugoslavia – International Radio Serbia now greets you and signs off.

Source: http://voiceofserbia.org/content/end-radio-yugoslavia-%E2%80%93-international-radio-serbia#sthash.rvvWUjgx.dpuf