Category Archives: Radios

Exotic shortwave DX copied in Rio Capim, Northern Brazil

The beautiful Capim River in a land of Jaguars, Tarantulas and occasionally, wonderful shortwave DX

Hi there, I returned from my third trip to the Rio Capim area of Pará, Northern Brazil about 5 weeks ago, having been out there for exactly a month. Now, whilst this was strictly a business trip I always make time to tune around the bands, mostly shortwave, in the hope of copying some interesting DX. My previous two trips were reasonably successful; however, I didn’t really hear anything new – just lots of Tropical Band – and tropical stations with much greater signal strength and clarity. Part of the problem is one of which most of us suffer from – the dreaded local QRM. Even in the depths of the rain forest noise is present from building electrical systems (particularly lighting) and other equipment. In my first attempt to escape the noise on this trip I ventured out of my accommodation building (basically a very large hut) to the wire fence that separates us and the larger fauna (although having said that, the monkeys and everything else that lives in the area appears to have no difficulty scaling a 6 foot fence – funny that! ). Anyway, ultimately, you’ve really got to want to hear something special quite badly to venture out. I suppose it could be the definition of hard-core DX! I tried this only once because as I was copying a very nice signal from Radio Guinea on 9650 kHz, I found myself about 2 feet from a Tarantula Hawk Wasp dispatching a very large spider (check out the very brief video on my YouTube channel). That was me done for alfresco DXing in the jungle.

Bonito’s USB-powered MegActive MA305 E-field antenna up a tree…performed superbly in Brazil

Fortunately, I was lent a 4-wheel drive truck for the duration of my visit and so I decided to find a quiet location to park up and listen to the radio – therefore only having to venture outside (at night) to place my antenna. One evening after dinner I got in the truck and drove around the site for a while until I found a location, effectively on the edge of the jungle that was mostly very quiet. Perfect…as long as I didn’t end up as something else’s dinner. I took the super-compact USB-powered Bonito MegActive MA305 antenna with me on this trip because I’d already tested it at home on DXpeditions and in Crete and thus I was confident as to how superbly well it would perform in a quiet location. To supplement my antenna choices, during the first weekend, I made the 90 km drive to the nearest town and bought, amongst other supplies, a 40 metre length of speaker wire and a 3.5 mm jack connector to make a temporary long-wire antenna.

In my experience, there are roughly 3 tiers of Tropical and Tropical Band DX on short wave. There’s the bottom tier of stations which with a decent portable and a few metres of wire can be readily heard in the UK on a Dxpedition – and at home with a magnetic loop antenna, for example and a good quality table-top receiver or SDR. Amongst this group of signals I would include Rádio Clube do Pará, Brazil on 4885 kHz, Radio Difusora Roraima on 4875.3 kHz, Emisoras Pio XII 5952.5 kHz, Radio Santa Cruz, 6134.8 kHz etc. etc. On the next tier are tropical stations that are really difficult to hear in the UK – but can be heard with good propagation and good equipment. This group includes Radio Aparecida on 6135.2 kHz particularly, Rádio Educação Rural on 4925.2 kHz, Radio Tarma Internacional on 4774.9 kHz, Rádio Evangelizar (formerly Radio RB2) on 6040.7 kHz etc. There are many more examples from these two groups I could use, but you get the picture. Lastly, there is a tier of stations that are very rarely or never heard in Europe, irrespective of equipment or propagation. Often these stations operate with low TX power which makes them extremely difficult to copy anyway – and that leads to ambiguity farther as to whether they are even on-air. Furthermore, some of these stations broadcast very irregularly, which makes copying them even more of a lottery.

My mainstay travel receiver, the brilliant Eton Satellit..two-time veteran of South American DXing

In this context, a month in Northern Brazil was a useful timescale for surveying the Tropical Bands and geographically tropical stations for the presence of very rare signals. Fortunately, over many hours of listening in Rio Capim with the Eton Satellit and mostly the Bonito MegActive MA305 antenna, I manged to record six signals that are very rarely heard outside of South America. The list of stations follows below, complete with the antenna arrangement. Further below you will find embedded reception videos and text links to the same videos on the Oxford Shortwave Log YouTube channel. Please take the time to watch the videos and note the comments made by some of my subscribers with local knowledge. In particular, Rádio Gaúcha and Rádio Canção Nova on 4825 kHz are very irregular broadcasters and therefore I was fortunate to be in the right place, at the right time to copy their signal. More luck came my way with the reception of Radio Sora de Congonhas on 4775 kHz – made possible because of a total power cut on site, reducing noise effectively to zero (I was indoors at the time). I, personally, never heard anything else other than Radio Tarma, Peru on or around 4775 kHz – itself something of a rarity, except when conditions are very good.

In conclusion, I have to say, once again, the DXing credentials of the Eton Satellit and the Bonito MegActive MA305 USB-powered antenna are clearly demonstrated here. The perfect travelling companions for the serious DXer and broadcast band listener alike, I had no issues getting through security at any of the airports and their combined weight is unnoticeable in a fully loaded backpack. I definitely recommend both products. It’s also worth noting that if you’re travelling to a relatively remote location, even with modest equipment, you might be able to copy rare signals that will provide good information to the rest of us trying to hear those same signals from 1000’s of km away. I will be returning to Rio Capim early in 2018 and I’m seriously considering taking my Perseus SDR with me. A superbly sensitive and selective receiver with noise reduction that actually works, it opens up the possibility of even more exotic DX on that trip.

As always, thanks for watching/listening/reading and I wish you all excellent DX and Season’s Greetings. 73!

The list of exotic catches and antennas utilised:

Radio Apintie 4990 kHz, Suriname – Bonito MegActive MA305
Radio Cançao Nova 9675 kHz Sao Paulo – 20 metre long-wire
Radio Verdes Florestas 4865 kHz, Cruzeiro do Sul – Bonito MegActive MA305
Rádio Gaúcha 11915 kHz, Porto Alegre – Bonito MegActive MA305
Radio Sora de Congonhas 4775 kHz, Congonhas – Bonito MegActive MA305 antenna
Rádio Canção Nova 4825 kHz, Cachoeira Paulista – Bonito MegActive MA305

Click here to watch on Oxford Shortwave Log YouTube channel

Click here to watch on Oxford Shortwave YouTube channel

Click here to watch on Oxford Shortwave Log YouTube channel

Clint Gouveia is the author of this post and a regular contributor to the SWLing Post. Clint actively publishes videos of his shortwave radio excursions on his YouTube channel: Oxford Shortwave Log. Clint is based in Oxfordshire, England.

Radio Deals: A few last-minute gift ideas!

5 Replies

Many thanks to SWLing Post friend “Karen” who writes:

My husband reads your website every day and is a dedicated radio geek. I’ve decided I’d like to get him an extra last minute stocking stuffer for Christmas. Any suggestions? We buy a lot from Amazon and are Prime members but any retailer that could get something delivered by Friday would work fine. Since this is a stocking stuffer, I don’t really want to pay more than about $70-90.

Thanks for your inquiry! Readers, “Karen” has kindly allowed me to post her message publicly and no that’s not her real name–!

Karen, you didn’t mention what radios he currently has, so you may double check before committing. I’ve listed a few options with links below. This list is by no means comprehensive–I just did a quick scan of a few retailers based on what’s currently a good deal and can be shipped ASAP.

Since you like Amazon and get free two day shipping via Prime, I’ll list several options there. I’d also encourage you to check with radio retailers like Universal Radio, Ham Radio Outlet and C. Crane–they, too, can ship via two or one day service, but it might be at a premium.

Just note to check the delivery date very carefully as we are down to the wire! Note that prices, especially those at Amazon, can change without notice.

Last minute stocking stuffers for the radio enthusiast

TIVDIO V-115 ($19.99): The V-115 is the least expensive radio in this list. It’s unique in that it performs quite well for the price and can even record broadcasts and playback MP3 files. Click here to check out past posts. Click here to view on Amazon.com (affiliate link).
Tecsun PL-310ET ($42.00): The venerable PL-310ET is a classic little ultralight radio and performs quite well for the price. Click here to check out past posts. The PL-310ET is also available on eBay, but I don’t think you’ll get it delivered before Christmas if you purchase from a China retailer. Click here to view on Amazon.com (affiliate link).
Tecsun PL-380 ($48.00): Very similar in size and function to the PL-310ET, the PL-380 is also a great value. Click here to view on Amazon.com (affiliate link).
C.Crane CC Skywave ($89.99): I think the original CC Skywave–not to be confused with the recently released CC Skywave SSB–is a brilliant little radio. Click here to read our review. Universal Radio has the lowest price ($79.95) but shipping is extra. Amazon’s price is $89.99 (affiliate link)
SDRplay RSP1A ($119.95): I know this software defined radio is over your $90 budget, but it’s a fantastic value regardless. Click here to read our review. Ham Radio Outlet is the only US retailer I know of who could deliver this before Christmas–click here to view on their site. If you lived in the UK, I would send you directly to SDRplay ($99) to purchase.
Tecsun AN-200 Loop Antenna ($27.90): This isn’t a radio, it’s a portable loop antenna that helps with AM broadcast band performance–not shortwave. Still, I list this because if your husband doesn’t have an AN-200 antenna, he’ll enjoy using it as it enhances mediumwave reception on almost any portable radio. Universal Radio sells the Grundig branded version of this antenna for $29.95 plus shipping. Click here to view on Amazon.com (affiliate link).
The Worldwide Listening Guide ($29.95): I recently reviewed this unique and useful program guide. It’s also available at Universal Radio for $27.95 plus shipping. Click here to view on Amazon.com (affiliate link).
Shortwave Receivers Past and Present ($39.95): This book is sure to please any radio geek that is interested in vintage radios. Click here to read my review. It is in stock at Universal Radio but I’m guessing you’ll need to budget for two day shipping since this book is very heavy! Still…I think it’s worth it and will surely surprise the radio enthusiast in your life if they don’t already have a copy. Click here to view at Universal Radio. Note: I would urge you to call Universal Radio to make sure Shortwave Receivers Past and Present can be delivered prior to Christmas.
Buy a subscription to The Spectrum Monitor Magazine ($24.00): This digital radio magazine is a fantastic value and a gift that will give all year long. Click here to read our review and click here to purchase a one year subscription.

Thank you for your question, Karen, and for allowing me to post your message, thus my suggestions, publicly. Since you asked specifically about Amazon, and since you get free two day shipping, I focused on Amazon offerings here. Note that my links are affiliate links and if you chose to purchase using one of these links, the SWLing Post will receive a small commission at no cost to you.

With that said, please consider purchasing from one of the radio retailers I mention above. The total price may exceed Amazon’s, but you can actually call these retailers to place orders and ask questions.

Post Readers who live outside of the US will have to check with radio retailers in their country regarding pricing and shipping on the items above. I wish I had time to list links to international options. Perhaps readers can comment with links and other suggestions?

Good luck and Happy Holidays!

Tecsun PL-880 hidden feature/hack: 1 kHz bandwidth on shortwave

11 Replies

[Note: This procedure was updated and simplified by Guillermo on 22 December 2017]

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

I own the PL-880 and just discovered a new feature : a 1.0 kHz bandwidth mode on shortwave (SW only not in MW).

The procedure to get it is as follows:

Turn on the radio and tune any frecuency on SW . There is no need to connect or disconnect an external antenna and turn on or off the radio during this procedure.

Be sure that on SW the 4 button feature(press 4 for about 2 seconds) is ON and 9 button feature(press 9 for about 2 seconds) indicates a value of 13 or more and not less than 10.

Then turn OFF 4 button feature and then ON again . Press BW button and see the 1.0khz new BW on the screen. Now you can use it permanently on SW and ALSO on MW , UNTIL you press BW button again .

Well, I hope you understand this description–if not please let me know, and tell me if it works on your unit, or it is just works on mine.

Thank you, Guillermo! I see where this is somewhat of a fragile adjustment in that a number of actions could change the bandwidth back to a previous setting, but nonetheless is quite a fascinating hack/hidden feature! Thank you and I’ll add this to our list of PL-880 hidden features.

Post readers: please comment if you can successfully enable the 1.0 kHz bandwidth on your unit. Please comment with your radio’s manufacture or purchase date if possible.

a.bsolument: Converting radios from vintage valve into boutique Bluetooth

10 Replies

Many thanks to SWLing Post contributor, Kim Elliott, who shares this link to a French company called a.bsolument who specializes in converting vintage valve radios into hi-fidelity Bluetooth-connected audio devices.

According to a.solument’s introduction video, they take vintage radios in disrepair, gut the insides and replace the components with modern hardware which includes Bluetooth 4.0 and aux-in capabilities:

https://vimeo.com/87657532

While I LOVE vintage radios, I have conflicting feelings about this process.

I take pride in keeping my vintage gear in proper working order (through the help of a mentor). Something that simply cannot be replicated with digital hardware is the sound and warm fidelity of AM audio emanating from a valve classic. At home, I have the option of feeding all of my vintage gear Bluetooth and wireless connectivity via an AM transmitter. This allows me to play any digital content while preserving the original audio fidelity (and warming my radio room with those glowing tubes!).

With that said, I’m very much aware that it’s becoming increasingly difficult for the average consumer to find a technician who can repair tube gear affordably. Indeed, some feel it’s impossible thus toss their family radio in the trash.

If a.bsolument is giving vintage beauties–that would otherwise be in a landfill–a new lease on life, then I’m all for it!

What do you think? Please comment!

C. Crane’s latest deal: Free Shipping on the CC Pocket Radio

How to find North American stations broadcasting in C-QUAM AM Stereo

4 Replies

Many thanks to SWLing Post contributor, Dave Zantow (N9EWO), who writes:

Just how many MW stations in North America are broadcasting in “C-QUAM AM Stereo” these days?? I found this reference which appears to be the most accurate list around the internet.

http://www.meduci.com/stations.html

I have taken this list and have edited it and converted to a PDF file [click here to download].

Best way to catch a AM Stereo signal these days is with a SDR device. We have been using Bernd Reiser’s “SoDiRa” program (version 0.100 Preview 24) with a SDRPlay RSP1 and does an excellent job with C-QUAM AM Stereo decoding.

http://www.dsp4swls.de/sodira/sodiraeng.html

During sky wave nighttime conditions we received CFCO in Chatham Ontario well of late on 630 kHz in AM STEREO (country music format). Program also appears to have built in DRM and DRM+ decoding (we have not tested this part of the program). IMPORTANT NOTE : We found we needed to use the older EXTIO version 3.7 otherwise we encountered errors with OUR connected Windows 7 PC’s (your situation may vary).

Dan Robinson’s JRC NRD-545

Not to forget that the JRC NRD-545 receiver has “built in” AM Stereo decoding (AMS mode). One MUST use the phono jack “line outputs” on the rear panel connected to an external amplifier etc. It does NOT output via it’s headphone connector. Speaking of the JRC NRD-545, please see my web page for late important service information on my “Radio News” webpage.

http://webpages.charter.net/n9ewo2/news.html

Thanks for the tip, Dave!

The last time I listened to a C-QUAM AM stereo station it was with WNNC station owner/manager, Dave Lingafelt. We sat in his beautiful red Buick Reatta, parked at the station and transmitter site and listened to 1970s rock on 1230 kHz. Needless to say, it sounded absolutely amazing! Indeed, all of Dave Lingafelt’s stations (WNNC, WAIZ and WXRC) sound amazing.

To listen to an AM station in stereo is a real treat. Thanks for reminding us, Dave!

The uBITX Transceiver: Pricing and more details

8 Replies

Many thanks to SWLing Post contributor, Pete Eaton (WB9FLW), who shares pricing and additional information about the uBITX general coverage QRP transceiver:

Here are the details, if purchased before Christmas $109 delivered!

http://www.hfsignals.com/

From uBITX creator, Ashhar Farhan:

1. The ubitx is now available for sale, for $109 dollars (includes the shipping), but only until Christmas. *After Christmas, the price will increase to $129 dollars. for this initial batch, a few ham volunteers and I pitched in to sort the crystals, test the coils, tune-up and box these initial kits, we won’t be able to do that any more. we will have to hire more people (which is not a bad thing) and get them to do it.

2. The ubitx is on sale at hfsignals.com, not hfsigs.com. it is easier to remember. we will soon point hfsigs.com to the new website as well. The new site is in wordpress, that means that we can have volunteers writing and updating it rather than waiting for me to hand code the content in html and vi editor.

3. We need help with proof reading the web content.* If you find any typos, please mail me on [email protected] address (not the bitx20 list),

These apart, the early buyers must be aware that they are beta users of sorts, the firmware will sure get updated. i hope there won’t be any revisions of the PCB.

Pete adds:

Just as an aside the original price of the Heathkit HW-8 was $139.95 (in 1970 dollars) and it became a QRP Classic. The uBITX may become one as well and like the HW-8 there will be (and already are) all sorts of mods/additions one will be able to do. The uBITX is 10 dollars cheaper (after 12/25) works 80-10 M, does SSB in addition to CW, and is a Superhet to boot!

Farhan your hit this one out of the Ballpark!

Very cool, Pete! I am very tempted to purchase the uBITX transceiver before Christmas and have it delivered via DHL service. The only thing holding me back is simply the amount of projects I have on my table at the moment! $109 is an incredibly low price for a full-fledged QRP transceiver!

I’m absolutely amazed that it is also has a general coverage receiver. Perhaps the uBITX could serve the SWL as well as the ham radio operator? I suppose we shall soon find out!

Click here to read our other posts regarding the uBITX transceiver.

Click here to order the uBITX transceiver kit.

Please comment if you plan to or have purchased the uBITX. We’d love your feedback!