Category Archives: Shortwave Radio

Larry’s review of the CountyComm GP5/SSB

Many thanks to SWLing Post reader, Larry Thompson, who shares his review of the CountyComm GP5/SSB:

Been having a ton of fun with my new toy, the tiny survivalist radio, the CountyComm GP5/SSB receiver. $74.95 with free heavy duty cordura case with metal belt clip (normally $17.95). Also purchased 2 spare whip antennas @ $6.00 ea. The unit arrived promptly
in just 5 days from CA.

The radio is manufactured by Tecsun and is similar to the Tecsun PL-365, but re-engineer end to military standards for use in embassies and military installations around the world. The case is a heavy plastic that feels like anodized aluminum.

It’s about the size of a small TV remote control, taller than a cell phone, and about 1/2 the width of an iPhone.

Very, east intuitive menus. Incredibly sensitive to dx, relatively good selectivity. A great radio to throw in your travel bag or briefcase. So small that no one, especially customs, TSA, etc would even suspect it is a shortwave receiver with SSB capabilities.
I live in a very highly QRM and RFI interference zone.

I’m in the central city, in an old 1920’s hi-rise, with high power tension lines right next to the building.

Lots of QRM from the elevator motors, etc. Having a good antenna option is a challenge.
I’ve resorted to a stealth longwire antenna, strung out my 5th floor window. It’s 50′ of #16 black insulated copper stranded wire, weighted by a medium size galvanized carriage nut. It seems to work well.

I also use a Magic Wand shortwave antenna, a type of broomstick antenna with 23′ of lead-in, available from Lowbander on eBay.

My main receivers have been a Sony ICF-SW7600GR dual conversion receiver and the SRDPlay. In the past, I have listened to dx with some really outstanding receivers, including a Nordmende Globetrotter, a National NC-183D, a Japan Radio JRC-525′ and a Yaesu FT900AT transceiver. The later two were computer-controlled using TRX-Manager software.

In just 4 days, I can’t get over the sensitivity of the CountyComm GP-5/SSB and it’s ability to pull in stations. So far, it’s far superior to the Sony or SDRPlay.

Digging into the specs, it is a direct conversion receiver, using a DSP si47XX microchip from Silicon Labs to digitize the analog AM/FM broadcasting signal base on modern software technology and radio principles. The direct conversion circuitry can highly improve a radio’s sensitivity, selectivity, S/N ratio and anti-interference capabilities. Direct conversion using software is far superior to a double or triple conversion traditional IF circuitry. This must explain why the unit is so amazingly sensitive!

I can hear things on this unit that I can’t even begin to hear on the Sony or the SDRPlay. The FM reception and sound with earphones is amazing and LW and AM reception is equally sensitive. I can easily get WLW Cincinnati 700 kHz in the daytime here in St. Louis!

There are 550 preset memories: 100 for AM, 100 for FM, 100 for SSB, and 250 for SW. You can scan the memories or scan the bands in various ways. You can also use the Auto Tune Storage function to store memories.

Something I really enjoy is the Easy Tuning Mode function. The ETM function allows you to tune into stations easily and temporarily store them into the ETM storage. 100 stations for FM/MW and 250 for SW. Scanned stations will not be stored in the regular 550 memories, but will remain in the ETM temporary storage until the next time you do an ETM scan.

This is a great feature for travel. When you are in a different city, you can perform the ETS function and this will not delete any of the stations already in the memory.

Thanks for sharing your review, Larry. I use the GP5/SSB all of the time–it stays in one of my vehicles and I often use it for walks, picnics, camping and even a little parking lot DXing.

I suspect if your SDRplay RSP was hooked up to an antenna that could better mitigate your local QRM, you’d find it outperforms the GP5/SSB. The great thing about portables, though, is that you can simply take them to areas with low noise levels. It’s just a matter of finding the right location!

The CountyComm GP5/SSB is a very handy portable. Thanks again!

The CountyComm GP5/SSB can be purchased from:

CountyComm (current promo includes heavy duty carry case)
Universal Radio

The Tecsun version, the PL-365, can be purchased on eBay (though be aware that some sellers have BuyItNow prices almost two times the price of CountyComm).

Mike’s low and high pass filter deals

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SWLing Post contributor, Mike Ladd, is an avid SDR enthusiast and an administrator of the SDRplay Facebook group. Mike contacted me about special pricing he has arranged for low and high pass filters through Rescue Electronics. Mike explains:

These filters retail for $70.00 each. I spoke to the builder. I told him who I was and what I do and got him to make a deal for anyone in the United States with these filters and a direct link to his site. I make zero dollars on this. I always try to give back to the hobby and the community any way possible.

You have 3 choices: a high pass filter, a low pass filter, or a combo package.

These are hand built one at a time by Paul W1VLF with your choice of SO-239 or BNC connections. Full details are below:

High pass filter $55 shipped anywhere in the USA

This filter will begin attacking the AM band at 1770 Khz and increase attenuation as frequency decreases.

You can see this in the screen capture of the swept filter below.

160 Meters and above is virtually left untouched, but below that is where the attenuation takes place.

The filter has attenuated 60 db by 960 KHz.

The AM band has some very large signals that can mix in the front end of your. A lot of these spurious frequencies can land in 160 meter band or above.

For instance, I have a big signal at 1080 Khz and another at 770 Khz, add these 2 together and you get a spur that falls at 1850 Khz

Picture this happening at multiple frequencies with multiple mixes and you have a raised noise floor in the 160 Meter band.

The filter is built into a 2″ x 4″ 1.25″ 1/8″ wall aluminum enclosure for excellent RF shielding

Low pass filter $55 shipped anywhere in the USA

The AM-2 filter has a cutoff at 520 KHz.

Then, and without a lot of fanfare it begins the attack on the MW band.

Purchase this filter if you are into NDB, DX’ing, Maritime Mobile, Navetex, FCC Part 5 600 Meter band.

Each filter is handmade and swept in my lab.

The AM -2 Low pass is equipped with BNC connectors.

The filter begins to roll off at 520 Khz and gives an ultimate rejection of around 80 Db.

The filter is built into a 2″ x 4″ 1.25″ 1/8″ wall aluminum enclosure for excellent RF shielding

Combo deal for both $100 shipped anywhere in the USA

Click here to view/purchase via Mike Ladd’s promotional page at Rescue Electronics.

Many thanks for sharing this Mike! During my presentation at the Winter SWL Fest last week, I spoke about the need for high/low pass filters for listeners who live in the presence of strong broadcasters and interference. Many of the inexpensive SDRs on the market do not have built-in filters and preselectors thus can overload under these conditions.

While filters can be homebrewed or built from kits, these filters seem to be a good deal for a quality shielded and tested product. Thanks for arranging this, Mike!

WBCQ moving from 5,110 to 5,130 kHz

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SWLing Post contributor, Paul Walker, who hosts a radio show on WBCQ, received the following message from the station yesterday:

The FCC has just informed Allan Weiner that the military needs our 5110 frequency.

So your show on Friday 3/11 (10pm Eastern – midnight) will be broadcast on 9330 and 5130.

WBCQ has been announcing this change on the air. Many thanks to Mike, who shared this video of Allan Weiner making the announcement last night:

Click here to view on YouTube.

DigiDX: a new digital broadcast via Channel 292

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Many thanks to SWLing Post contributor, Stephen Cooper, who shares the following news about the new DigiDX broadcast:

DigiDX is a 30 minute MFSK32 broadcast covering shortwave and DX news, radio related reviews, schedule information and listeners letters and after a success test broadcast to Europe, a broadcast for North America is planned for 0200 UTC Sunday.

Broadcasting from Channel 292 in Germany on 6070 kHz the time has been chosen to maximise chance of reception on the East Coast of North America and beyond.

The programme features the majority of the broadcast in MFSK32 but around 10 minutes of the broadcast is in the slower Olivia 64-2000 mode to test for resilience against bad propagation to North America and interference on 6070.

The tests to Europe on Channel 292 earlier this week showed good reception and near perfect decodes despite Radio China International and Vatican Radio being on the same frequency during some of the test.

To decode use FlDigi, MultiPSK or the Tivar Android app, just putting your radio next to the PC microphone or phone/tablet is enough to decode the broadcast. If you have decoded the VOA Radiogram before, DigiDX uses the same digital modes.

Please send reception reports and decodes of the text/images in the broadcast to [email protected], an e-QSL will be sent by email and on the next broadcast an e-QSL card will be broadcast over the air in MFSK32 mode as well.

For European listeners the second edition of DigiDX with an include e-QSL card from the last episode will be broadcast on 6070Khz at 1100 UTC. For information on further broadcast times like DigiDX on Facebook (https://www.facebook.com/digidx/) or follow on Twitter (https://twitter.com/Digi_Dx)

This is brilliant, Stephen! I’ll attempt to log DigiDX this weekend if conditions are fair!

Max’s Barlow Wadley receiver is a keeper

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In reply to our post about the Barlow Wadley XCR-30, SWLing Post reader, Max Youle, replies:

I have a Barlow Wadley with the FM tuner here in New Zealand. [see photo above]

These fabulous receivers are reasonably common here as many SWLs bought them in the 1970s because of New Zealand’s remote location

My Barlow Wadley has just recently had an alignment and a thorough going over, and will now match my Sony ICF 2010,and Yaseu FRG 8800 for stations received on the shortwave bands, but not so good on the MW band.

I love this radio, and its quirky tuning system. This reminds me of the days of knob twiddling to find those elusive signals, not like the ease of todays digital receivers.

Thanks for your comment, Max. Your Barlow Wadley portable is certainly a keeper! Perhaps someday one will find its way to my radio room!

SDRplay RSP update includes broadcast ID

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The SDRplay RSP software defined radio

Many thanks to Jon Hudson at SDRplay who shares the following news:

The latest EXTIO control file (Version 3.8.1) has a very cool new feature for shortwave listeners interested in hunting HF DX stations.

Using the world-wide station list mintained by http://www.eibispace.de/ you can see the name of stations appear in a pop-up window as you select a particular broadcast signal. The details are in the updated EXTIO user guide selectable from the Platforms section or by clicking here.

There’s a video demo here: