Category Archives: Portable Radio

Tecsun PL-880: Evans notes signal meter and other discrepencies

PL-880 (1)

SWLing Post reader, Evans (in Greece) writes:

I would like your opinion regarding two strange points we noticed in two different Tecsun PL-880 models, which a friend and I have recently purchased. In particular:

  1. The signal meter is supposed to measure up to 99dBu (my Tecsun PL-390 s-meter goes indeed up to 95-97dBu for very strong amateur signals in my area included mine in mw zone). The point is that for both devices (both of which have 8820 firmware) the signal meter does not exceed 85 dBu and in particular my Tecsun PL-880 signal meter does not goes over 70dBu (ie. even lower measurement). Why this behaviour?

  2. Another strange point is that my friend’s Tecsun receiver displays for a “quiet” frequency (mw) a noise level of about 10-12dBu, while my Tecsun device shows only 2-3dBu noise (same frequency in the same spot!). We both tried the threshold muting adjustment (key 9) and this worked a bit but with minor results in sensitivity, especially for my Tecsun PL-880 receiver. Is it possible to adjust the noise level so that it can be 10-12dBu instead of being only 2-3dBu and hence better sensitivity? And is it possible to adjust the maximum signal level (99dBu instead of 85dBu or even worse 70dBu for my device)?

  3. I have noticed that the hidden feature regarding the external mw antenna didn’t work in my case, even though I did resets an tried many times. I pressume, hence, that maybe Tecsun disabled this hidden feature. Is there any modification available to “add something” into the radio hardware in order to be able to listen mw/lw frequences with external antenna and thus, increase sensitivity?

Many thanks for your questions, Evans. Since my PL-880 is a first production run unit, I’m hoping readers who’ve recently purchased the Tecsun PL-880 might comment.

I suspect Tecsun engineers give little thought to calibrating the S meters. I’m very curious if there is a hidden feature to do this, but I’m guessing this is limited only to those who can program the DSP functionality of the chip inside.

Spread the radio love

Tecsun cautions against using Lithium AA cells in the PL-606

TecsunPL-606

SWling Post reader, Philip Dickinson, recently contacted me with the following question:

“I have just bought a Tecsun 606 which takes two AA batteries which I think are normally rated at 1.2 volts. I have just ordered some lithium ion AA and notice that they are 3.7 volts. Can I use them?”

I replied to Philip that I’m pretty sure I’ve used lithiums in my PL-380 and/or PL-310ET without experiencing any problems. I know I’ve certainly used lithiums in several other receivers. [Update: I’ve always used Energizer and Duracell 1.5 V Lithium AA batteries–not 3.6V AA batteries.]

As I was about to post his question here on the Post, Philip sent another message:

“I found Tecsun’s email address and they rule out the 3.7 volt lithiums. Good job I checked.”

Wow–indeed, I’m glad you checked as well!

I had searched the PL-606 owner’s manual (PDF), but found no reference for voltage tolerances. Now I’m curious if other Tecsun receivers would have difficulty handling the higher lithium voltage.

Please comment if you have insight!

[UPDATE: Please check out this follow-up post and primer on Lithium batteries.]

Spread the radio love

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

Sony-ICF-SW100In 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-NonWorkingYou 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.

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)

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.

Listening to the 'SW100 before I pack it for my next trip.

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

Sony-ICF-SW100-Open2As 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.

Spread the radio love

The Siru Innovatios SDR20 adds new features

Siru-Innovations-SDR20-1

Many thanks to Jarkko Mäkivaara with Siru Innovations who writes with the following update:

We have added some new features to our SDR20 portable radio!

Please see the video [below] for a demonstration of the following features:
* Smooth zoom in FFT/waterfall view
* Adaptive menu
* Frequency memory with snapshot pictures of signals
* Sliding effect between views
* Keyboard beep
* FM broadcast receiver
* Example of Ham radio transceiver with Narrow-FM mode
You also might got the email sent out Today where this is in HTML format.

https://vimeo.com/134605242

Spread the radio love

Shortwave portables that are PC-programmable?

Tecsun-PL-680-MW

SWLing Post reader, Mark, recently contact me with the following question:

“What portable shortwave radios under $300 have an option to have their memories programmed using a computer?”

I replied to Mark that I can’t think of a single shortwave portable that can be programmed via computer–at least, not a “typical” portable radio like a Sony, Sangean, Tecsun, Degen, or Redsun.

Yaesu-VX-3R

The Yaesu VX-3R HT tuned to the AM broadcast band.

I may be wrong, however, so please comment if you can help Mark identify a model.

I am aware of portable wideband communications receivers/transceivers that cover the shortwave bands: handhelds like the Icom-IC-R6, Icom IC-R20, Yaesu VX-3R, AOR AR8200 Mark III B and Kenwood TH-F6A.

Wideband handhelds are more akin to a scanner, though, and typically shortwave sensitivity is simply not on par with a dedicated shortwave portable. The AOR AR8200 Mark III B  ($700+) and discontinued Icom IC-R20  may be a couple of exceptions.

Please comment if you can help Mark with his quest.

Spread the radio love

Guy discovers the $13.99 Basbon DS-858 shortwave radio

Babson-ShortwaveSWLing Post contributor, Guy Atkins, writes:

I spotted this new listing on Ebay today, and was wondering if it’s a new model, or perhaps a repackaged Tecsun PL-606? It’s lacking the rotary tuning knob and has a smaller display than the 606 however. It also has two rows of main buttons rather than three:

http://ebay.to/1KGjfrN

Curiously, the seller doesn’t even list the brand name in their auction title; it’s only noted in the pictures. However, “Basbon” isn’t exactly a brand of communications receivers with a long, proud tradition :^)

For $13.99 including shipping the the USA it’s hard to go wrong, so I’ve ordered one.

[…]Three features that caught my eye with the little Basbon radio are that it’s DSP based, it has LCD backlighting, and shortwave frequency coverage down to 3200 kHz. There are 20 memories and a sturdy-looking whip antenna that rotates 360 degrees, too.

I can’t wait to get ahold of this and open it up! I wonder which SiLabs chip it uses?

Thanks for the tip, Guy! I’m also very curious about this little portable–indeed, curious enough, I purchased one, too. Guy and I will compare notes and I’ll post an update after I receive the radio. It’s being shipped via ePacket from China, so transit time will be roughly two weeks if not held up in customs.

Frankly, my expectations are very low, but like Guy, it’s a little too tempting at $13.99 shipped!

Click here for a direct link to the Basbson DS-858 on eBayclick here to search for the DS-858 should the current item number expire or sell out.

Spread the radio love

Degen refreshes shortwave product line

Degen-DE221-001

Many thanks to SWLing Post reader, Paul, who commented with a link to the new Degen DE221 “ultralight” radio: http://ebay.to/1fKWZ2m

Paul’s link lead to the discovery of several new Degen models, in fact. Many of the new models have the same form factor–and a slightly different model number–from their predecessors.

Degen DE221 (updated from Degen 321)

Degen-DE221-001

Degen DE22

Degen-DE22

Degen DE23

Degen-DE23

Degen DE26

Degen-DE26

Degen DE27

Degen-DE27

Degen DE36 (updated from Degen DE32)

Degen-DE36

There may be even more 2015 Degen models than those I listed here and, in fact, they could’ve been on the market for a while.

I’ve already purchased the Degen DE221 for review since its predecessor, the DE321, was an acceptable radio for the $20 price tag. The DE321’s analog dial made for very vague tuning, however, so I’m curious if the DE221’s new digital display will be a worthy improvement. At this point, I don’t plan to review any of the other models above.

Spread the radio love