Category Archives: Radios

Vasily discovers an ETM quirk on his GP5/SSB

Vasily-GP5SSB

While doing a little shortwave listening in the field (obviously a very cold field) Vasily Strelnikov noted an anomaly while using the ETM function on his CountyComm GP5/SSB. He posted the following video on the Shortwave Listeners Global Facebook page and on YouTube so that I could share it with Post readers:

Click here to view Vasily’s video on YouTube.

I’ve never noticed this on my GP5/SSB. My first thought would be that there’s a strong broadcaster nearby that may be overloading the front end on Vasiliy’s receiver. With that said, it looks like a pretty rural area. Anyone else notice this on the GP5/SSB?

WRTH 2016: A look inside

WRTH-2016

I received my copy of the 2016 World Radio and TV Handbook (WRTH) directly from the publisher on Christmas Eve 2105. As many SWLing Post readers know, I always look forward to receiving this staple radio reference guide each year. This is a special year for the publication, too: it’s their 70th edition!

I should note that it was a special edition of the WRTH for me as well: upon request, I contributed two receiver reviews and a feature article. It was an honor working with the WRTH publication staff and being included in the 70th edition.

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 sixty or so pages to articles relating to various aspects of the radio 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, Dave Kenny tells us how he got interested in the hobby and what being a contributor means to him. It’s fascinating to read about how his SWLing hobby turned into a career as he worked for BBC Monitoring for many years.

The second set of articles is always my favorite: WRTH receiver reviews.

AOR-AR-DV1

This year, WRTH reviewed the C.Crane CC Skywave (an update to one of my reviews on the Post).  They also review the new AOR AR-DV-1 (above), the Etón Satellit Grundig Edition (which impressed them favorably), the Tecsun PL-680 (again, an update of one of my Post reviews), and the Nti ML200 Megaloop.

The following article is “A Brief History of World Radio TV Handbook” which traces the publication’s history back to the Nazi occupation of Denmark in World War II. It’s a fascinating read and puts the publication into context as technology, international broadcasting and the WRTH team have evolved over the course of 70 years.

In the next article, UK MW & LW Broadcasting: the first 95 years, WRTH contributor Dave Porter (G4OYX), outlines the history and current use of MW & LW broadcasting. A fascinating history written by a former BBC senior transmitter engineer!

Next is the added feature 70 Years of Reception which looks at receiver technology and innovations that have had an impact over the course of WRTH’s long history. They highlight a few select receivers over the decades like the RCA AR-88, Eddystone 840-A, Eddstone EC-10, Barlow Wadley XCR-30, Kenwood R-1000, Drake R8 and the WinRadio Excalibur Ultra.

Timore-Leste-Map

Following this, WRTH contributor, David Foster, features an article on Radio in Timore-Leste.  Foster has been involved in Timore-Leste for many years–his article gives excellent insight into this part of Southeast Asia. Indeed, I always look forward to David Foster’s articles in WRTH!

This year, WRTH also features an updated and revised article I wrote for them on The Future of Shortwave. Again, I’m honored to have contributed to the 70th edition of WRTH.

WRTH International Editor, Sean Gilbert, also wrote an excellent Guide to SDRs–a brilliant little summary of what SDRs are, how they work, and some common terminology used in reviews.

The final article–a tradition–is the WRTH  HF propagation report/forecast by Ulf-Peter Hoppe. Always an informative read (even if the prediction isn’t positive for DXers).

As expected, the 70th 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–especially for all of my off-grid DXing.

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. When readers ask me for station contact information, it is the current WRTH I reference.

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 2015 directly from WRTH’s publishers, or from a distributor like Universal Radio (US) and Amazon.com (US), or Radio HF (Canada).

SWLing Post contributor, Richard Langley (Canada), also noted that  BookDepository.com, a U.K.-based seller, is offering WRTH at a discount and with free worldwide shipping. Thanks for the tip, Richard!

A high-gain ferrite bar antenna for the PL-360/PL-365 and CountyComm GP5 series

Ferrite-Bar-Antenna-PL-365-GP5SSB

If you own a Tecsun PL-360, PL-365 or a CountyComm GP5/DSP or GP5/SSB, you might take note of this large ferrite bar antenna offered by a Greece-based seller on eBay.

Ferrite-Bar-PL-365

As you can see in the image above, this antenna is substantially larger than the stock MW antenna supplied by the manufacturer. According to the seller, this ferrite bar antenna has a 10 – 25 db gain over the stock external antenna. I imagine its ability to null unwanted signals is also much better.

The price is about $40 US shipped internationally.

Have any SWLing Post readers ordered this antenna? If so, please share your comments/reviews.

Click here to view the antenna on eBay.

SWLing Post reader, David Korchin, also shares the following demo video on YouTube:

Many thanks to SWLing Post readers, Francis Frankenne and David Korchin for the tip!

One of the highest prices ever paid for a Collins 51J-4

Collins-51J4Many thanks to SWLing Post contributor, Dan Robinson, who writes:

Over $2k for this receiver, which appears to be quite unique. It is not one of the well-known and quite rare Beckman 51J4s, and likely it was re-finished to give it the almost white-grey color it has.

But it does have an interesting tuning addition, what the seller calls a factory-installed 4:1 vernier knob. Regardless, it fetched about as much as any 51J4 has ever brought in on Ebay:

http://www.ebay.com/itm/181975178674?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Thanks, Dan! That 51J4 is a beauty. I’m always amazed at the price Collins equipment fetches at auctions and even at Hamfests. You’re hard-pressed to find anything under $800 and rare units (like the 51J4 above) sell for so much more.

Someday, I’d like to add a Collins R-390A to my collection, but first I need to make room for it and start saving! My buddy, Charlie (W4MEC) has rebuilt several R-390s and I’ve no idea how he does it. The tuning mechanism alone is one amazing (and complicated) piece of engineering! Charlie loves a good challenge, though, and he’s certainly brought a few R-390s back into full service.

A review of the AOR AR-3000A Wideband Receiver

ar3000Alrg

Many thanks to SWLing Post contributor, Mario Filippi (N2HUN) for the following review:


The AOR AR-3000A Wideband Receiver

by Mario Filippi, N2HUN

(All photos below by author)

The AOR AR-3000A is a wideband communications receiver, made in Japan, covering 100KHz – 2.036 GHz with all popular modes including AM, NFM, WFM, CW, USB and LSB. The AR-3000A was produced in the early ‘90’s at the price of $1063 and came with a telescoping back-of-set antenna, wall-wart power supply, and well written 57 page manual.

AOR is a long time reputable manufacturer of radios and electronic equipment that continues on today producing high quality equipment. While the AR-3000A can be considered a tabletop unit, it is quite small, measuring only 8” x 5” x 3.5”. The AR-3000A has a total of 400 memory channels, with four “Banks” (Banks A- D) each holding up to 100 channels. Each stored channel holds all the necessary parameters such as frequency, mode, attenuator, and step size. An optional mounting bracket for mobile operation was available along with an optional DC cord for those wanting to use it as a scanner for public safety monitoring. It does not run on internal batteries though.

What I like about this radio is it’s wide coverage and it functions as my main longwave/shortwave receiver in addition to a scanner for monitoring local VHF/UHF public safety bands.

AOR 3000

As desktops go, this one has an unusual shape. While the unit is horizontally shaped for the most part, the front panel is angled slightly upward to make the controls easier to read. However, it took a while to get used to the small print on the panel and LCD so if you wear glasses, definitely don them because you’ll need ‘em. As a matter of fact I’m contemplating purchasing a pair of those magnifying eyeglasses to see (pun intended) if they’ll help (hi hi!).

AOR-3000-side view

These units come up for auction on Ebay and on ham classifieds at a much reduced price, most in remarkably good shape for a quarter-century old receiver.

A recent survey of Ebay auctions show they run from about $183 – $350; over several hundred dollars less than the original price. I chose to purchase one from a ham classified website at a higher price but it was well worth it. When it comes to high price tag items I tend to scout out the ham ads first. The seller was a friendly, honest ham who was a great communicator so the deal went smoothly. He included the computer control cable and even replaced the backup memory CR2032 battery, something every buyer should consider when purchasing vintage units.

For advertisements of vintage AOR products check back issues of Monitoring Times at: www.americanradiohistory.com . This site is an excellent resource for old time radio, TV, broadcasting and miscellaneous electronics publications and contains a mind boggling array of books and periodicals from the past.

The front panel is laid out quite well, with soft touch pads in the center allowing easy parameter entry, a tuning knob on lower right, and my favorite, a manual squelch knob. Most of the touch pads have a secondary function which appears in white lettering while primary functions are in yellow.   If you’d rather not spin the VFO dial, which is quite small (0.75” diameter) there are up/down arrow keys to accomplish that function. The knob spins smoothly with no obvious détente.

Front panel (sorry about the camera shutter ghost!)

Front panel (sorry about the camera shutter ghost!)

The rear of the unit has several connections: BNC antenna, 12V input, DIN socket for a recorder, external speaker, RS232C for computer remote control, and On/Off switch for computer/manual control. Back in the day you could purchase ScanCat Gold software for about $95.00 that would allow computer control of the unit. I am in the process of finding any existing software that will allow that and it’s not easy to come by, but that is not a priority.

Oh and where is the speaker you might ask? On the underside of the unit.

Plenty of rear connections.

Plenty of rear connections.

This unit was purchased to save space at my desk as it’s quite small and serves as my main source of longwave, medium wave, shortwave, and VHF/UHF reception. For HF it’s hooked to an S9 43 foot vertical antenna with many (50+) radials. S9 Antennas unfortunately is no longer in business, but when the company had just started up I purchased the 43 footer for ham use. It’s lightweight, made completely of fiberglass, and has been up several years with no problems.

S9 antennas was eventually sold and the antennas were available from LDG Electronics last time I looked. If you check out their pictures at http://www.ldgelectronics.com/c/252/products/12/62/3 you’ll see my house on the left sporting the S9v43 footer. By the way, when I bought the AR-3000A, the seller stated that ”it’s a great radio as long as you don’t connect too big of an antenna to it”(hi hi!). Yes, I found it tends to suffer from overload with my large antenna, but the 3000A has a useful built-in attenuator

As a wideband receiver the AR-3000A fits my needs perfectly. For LW it receives aeronautical beacons as far away as Quebec and New Brunswick, Canada. NAVTEX transmissions on 518 KHz are easily decoded using a SignaLinkUSB and YAND software.

As for HF, I’m mainly a utility listener and have a bank of memory channels for WWV (2.5, 5, 10, 15,20 MHz), WLO (8.471MHz), CB channels, Volmet stations, USCG facsimile frequencies, W1AW on 3.581 for code practice, a slew of RTTY station frequencies, the 10m FM band repeater frequencies, Radio Habana Cuba, 4XZ (great for code practice), WLO maritime weather broadcasts, and several channels for different ham band frequencies of interest.

Radio Shack discone offset –mounted on TV antenna mast.

Radio Shack discone offset –mounted on TV antenna mast.

For scanning, obviously the 3000A can’t compete with modern scanners. It was a different era back then. So, no trunking, no CTCSS tones, and the scanning speed slow compared to today’s standards, but it does have the usual features like channel lockout, scan delay, priority channel, step adjustment, search mode and does cover the military aeronautical band.

As a basic scanner for monitoring local state/local first responders, aeronautical (ATIS, ACARS) channels, NOAA satellites, NOAA weather channels, my local repeater, GMRS, FRS, taxis, railroads, etc., it is a very satisfactory performer. I can even hear the NY City Transit police from my location in W. New Jersey which is a pretty good distance, ATIS from LaGuardia and Philadelphia airports, and taxis in the Philly area, all while using a Radio Shack discone on the chimney.

For a more in-depth review of the AR-3000A by Bob Parnass, check the November 2000 issue of Monitoring Times magazine. Universal Radio has a great archive of discontinued radios so check them also at www.universal-radio.com. User reviews can be found on www.eham.net, that’s one of my favorite feedback sites. There’s also an AR-3000A Yahoo users group that’s a great resource. If you want to see videos of the rig in action then search on YouTube as there’s a good number available. In conclusion, I’m very satisfied with the AR-3000A, it’s exactly what I was looking for and is an integral part of radio receiver history.

If any other AR-3000A owners are out there, let’s hear from you. Thanks and 73’s!


Many thanks for this excellent review, Mario. I always thought the AOR AR-3000A was a cool little receiver. When it was being produced, the price was way beyond my means as a college student. At the time, though, it had to be the most compact, best performing, wideband receiver on the market! 

If any Post readers can help Mario find a solution for computer control of the AR-3000A, please comment!

Thanks again, Mario–we look forward to your next contribution!

eBay find: the “mythical” Sony CRF-V21

Image source: Universal Radio

Image source: Universal Radio

Many thanks to SWLing Post contributor, Anil, who writes:

Here is a link to an Ebay auction for the mythical Sony CRF-V21. In all my years, I have never seen one for sale before and it might be interesting for some blog readers…

Click here to view on eBay.

Mythical is, indeed, the correct word for the Sony CRF-V21, Anil!

Check out our previous post that mentions the Sony CRF-V21.

George demonstrates the Tecsun PL-880 tuning bug

PL-880-Tuning-Bug

[19 January 2016: Please read this updated post.]

In response to Pawel’s post about a tuning bug affecting a recent batch of Tecsun PL-880s, SWLing Post contributor Georges (F6DFZ) comments:

I have posted a new video about this important bug of the PL-880.

I did so because it seems some people don’t understand this very important issue.

This video shows the Tecsun PL-880 tuning bug which is present on SSB when using the Fine Tuning knob.

The PL-880 is tuned to the Shannon Volmet on 5,505 MHz USB.

At the beginning, I use the coarse Tuning knob to shows the effect of tuning 1 kHz down ; the pitch of the voice increases as we are on USB.

Then, I tune down 1 kHz using the Fine Tuning knob, and now the pitch of the voice decreases, indicating the bug with the reverse tuning using the Fine Tuning knob on SSB.
At the end, I use the coarse Tuning knob to hear the voice with a normal pitch, and you can see that the displayed frequency is 5,503.01 MHz, a difference of nearly 2 kHz versus the true frequency.

Best regards, and a Happy New Year

Georges F6DFZ

Thank you, Georges. Since I have an early PL-880 model that doesn’t have this bug, your video and explanation does clarify the situation.

That is frustrating. Until this bug is fixed, I couldn’t recommend purchasing a new Tecsun PL-880. I hope someone can confirm when the bug is fixed and the production run is once again free of this tuning issue.

Many thanks to Pawel and Georges for bringing this to our attention.