Radio Botswana, 1987 Style

No seasoned shortwave DXer can forget one of the most distinctive interval signals ever–the “barnyard animals” which marked the beginning of the broadcast day of Radio Botswana, Gaborone, for decades.

On its long-time frequency of 4820 kHz, Botswana was an occasional catch for me from the Seattle USA area. I yearned for clearer, more reliable reception of this station and other Africans which my East Coast USA DXer pals enjoyed!

Zebras mingle with other animals at Chobe National Park, Botswana.

Zebras mingle with other animals at Chobe National Park, Botswana.

It was always fun–and a DXing challenge–to catch Radio Botswana’s interval signal and sign-on announcements, but it was typically mid winter for reception in Seattle. Propagation on 60 meters needed to be favorable to enjoy anything other than a weak, barely listenable signal. Imagine my surprise and excitement when on the evening of December 27, 1987 I came upon the following signal booming in on 4820 kHz, far, FAR better than any previous Botswana reception. Indeed, their signal that evening surpassed in clarity even the Papua New Guinea and Indonesian “regulars” I would hear on the tropical bands from the Northwest USA.


This recording begins with the famous barnyard animals interval, the beautiful Botswana national anthem (Fatshe leno la rona, or This is Our Land in English) and is followed by a full list of broadcasting frequencies and times in English and the (presumed) Setswana language. That information is followed by a flute instrumental version of the Christian hymn Beautiful Savior, which introduces a short devotional or scripture message. The 10 minute recording wraps up with an a cappella children’s choir.

Great Circle route from the Gaborone transmitter to Seattle receiver location.

Great Circle route from the Gaborone transmitter to Seattle receiver location.

My receiving setup for this 1987 recording was an ICOM IC-R70 and a 300 foot long random wire antenna. Such a long antenna is unusual for the middle of an urban area, but I took advantage of living in a 3rd floor apartment across from a small city park. One midweek day, while most folks were at work, I managed to string out this long antenna with very small diameter braided steel wire from the 3rd floor apartment balcony to a distant treetop. This “sloper” antenna had significant directivity to the northeast, which happens to be the bearing for many African stations heard from the Pacific Northwest USA. The small diameter wire was suspended so high that it was virtually invisible from ground level.

Antenna orientation for 1987 reception of Radio Botswana. I'm sure this urban location is plagued by QRM and radio frequency interference now in 2016! My ICOM IC-R70 receiver handled the strong signals from nearby MW & FM broadcasters surprisingly well with the addition of a Grove Tun3 Mini-tuner preselector.

Antenna orientation for 1987 reception of Radio Botswana. I’m sure this urban location is plagued by QRM and radio frequency interference now in 2016! My ICOM IC-R70 receiver handled the strong signals from nearby MW & FM broadcasters surprisingly well with the addition of a Grove Tun3 Mini-tuner preselector.

I continued to log Radio Botswana occasionally on 60 meters until the station eventually left the air (early 2000s I think), but I never heard them again with such a strong, clear signal as in late December 1987!

Guy Atkins is a Sr. Graphic Designer for T-Mobile and lives near Seattle, Washington.  He’s a regular contributor to the SWLing Post.

From the Isle of Music for June 21

smallPromoFTIOMjune06072016 copy

The next edition of From the Isle of Music:

The June 21 (June 20 in the Americas on WBCQ) program features special guest Ethiel Failde, whose album Llego la Failde was nominated in the Opera Prima and Traditional Popular Music categories in Cubadisco 2016; we will also play some of the winner of the Traditional Afrocuban category, Soy de la Tierra Brava by Yoruba Andabo. We’ll finish Popularmente Sinfónico Vol II by Orquesta Sinfónica de Matanzas, and we will play some Los Van Van from the 1970s.
Two listening options on shortwave:
WBCQ, 7490 KHz, Tuesdays 0000 UTC (8pm EDT Mondays)
Channel 292, 6070 KHz, Tuesdays 1900 UTC (2100 CEST)

eBay find: The Mark 328 British Spy Radio

SpyRadio

Many thanks to SWLing Post reader Cap, who writes:

This little gem just popped up on eBay UK, it’s working and looks to be in very good condition and is also open to offers:

Click here to view on eBay.

[More info about the Mark 328 (a.k.a. MK.328) can be found here.]

This follows on from the FS5000 spy radio you posted about in April.

If I had a respectable amount to offer this Seller, I think I would.

True–by today’s standards–the Mk.328 isn’t a high-performance receiver. It’s single conversion and probably not über-sensitive.

Spy-Radio

Still, it’s a working piece of Cold War history and, back in the early 70s, probably packed the biggest punch for the size. I bet it’s over-engineered and will probably outlive most of us.

Mighty tempted to make an offer. I should probably distract myself about now.  Thanks, Cap! 🙂

“When everything else fails, amateur radio will still be there—and thriving”

IMG_6686

(Source: ARS Technica)

by Rupert Goodwins

It’s a good time to be technical. Maker communities are thriving around the world, tools and materials to create and adapt are cheaper and more powerful now than ever, and open source hardware, software, and information mean that if you can think it, you can learn how to do it and then make it happen.

For one group of technological explorers, this is more than just a golden age of opportunity: it’s providing the means to save one of the oldest traditions in electronic invention and self-education, one that helped shape the modern world: amateur radio. That matters.

Radio amateurs get a sweet deal, with effectively free access to many gigahertz of the same radio spectrum that companies pay billions for. They’ve earned it. Throughout the history of electronics, they’ve been at the borders of the possible, trying out ideas that commerce or government deem impossible or pointless—and making them work. One example of hundreds: Allied military comms in World War II needed a way to reliably control the radios used by front-line forces, replacing tuning knobs with channel switches. Hams had the answer ready and waiting: quartz crystal oscillators. (That’s part of computing history too—you’re probably using about ten of them right now.).

[…]Then, there’s backup. Take the European HAMNET, for example. That’s a four-thousand-node high speed data network covering a large part of continental Europe and providing full IP connectivity at megabit speeds. It connects to the Internet—ham radio owns 16 million IPV4 addresses, believe it or not—but is independent of it, doing its own robust and flexible routing. If the Internet was to go away, HAMNET would still be running. The same’s true of nearly all ham radio infrastructure: when everything else fails—power, comms, roads—ham radio is still there, and these days it can be a full-fat digital medium.[…]

Continue reading at ARS Technica…

London Shortwave: numbers station on top of VOT broadcast

SWLingPost-Numbers1

SWLing Post contributor, London Shortwave, just published an interesting post on his blog. He begins:

I have been regularly recording the small spectrum window containing the endangered stations I mentioned in one of my previous posts. Three days ago I noticed something strange: a morse code transmission superimposed onto the Voice of Turkey’s signal on 9460 kHz.[…]

Click here to read his full post and listen to the audio clip.

The Snowbirds in Québec City

DSC_4513Maybe it’s my radio-loving fascination with technology, travel, and what at times seems like sheer magic–-but for some reason I’ve long been something of an aviation enthusiast, as well. Over the years, I’ve discovered quite a lot of SWLs and ham radio operators share this interest…and if you’re one of these folks, well, have I got a post for you.

Aerien-Quebec

Wednesday in Québec City, as the sun dipped in the sky, viewers standing on the city’s walled fortifications were treated to an amazing aviation display which included a CF-18 Hornet, the CH-146 Griffon and last but definitely not least, the Canadian Forces 431 Air Demonstration Squadron––aka, the Snowbirds.

In the first act, helicopters:  four CH-146 Griffon helicopters in neat formation, and then the Canadian Coast Guard demonstrated lowering a guy from a emergency helicopter onto a Coast Guard boat in the middle of the St. Lawrence, , then drawing him back up into the chopper a few minutes later––with, of course, maneuvers throughout.

For the second act, the CF-18 Hornet pounded the sky with an assault of black-and-yellow speed, twice turning and showing both back and belly.

And for the finale, the Snowbirds skimmed into view in exquisite formation, and with tight, astonishing precision, glided around the ramparts of the old walled city, leaving perfectly drawn contrails of colored smoke.

Here are a few photos I snagged of the demo:

DSC_4554

DSC_4500

DSC_4638

DSC_4635 DSC_4711

DSC_4521

DSC_4734 DSC_4784

The Snowbirds

This particular public event wasn’t granted permission for a full acrobatic show, but the Snowbirds were in the air at least thirty minutes and showed off every one of their nine-plane position formations.  And were they ever precise!

DSC_4840

DSC_4864 DSC_4858 DSC_4941 DSC_4927 DSC_4912 DSC_5004 DSC_4962 DSC_5072 DSC_5096 DSC_5019 DSC_5032 DSC_5056

DSC_5062 DSC_5129 DSC_5113

The Snowbirds gave us a flawless and graceful show, one I’ll never forget. Canadian readers, you should be mighty proud of your Snowbirds; they’re an aviation team to be reckoned with.

Steve notes the ITU-R Recommendations on Radio Noise

SX-99-Dial

Commenting on our post about the FCC Noise Floor Inquiry, SWLing Post contributor, Steve Yothment writes:

One of the definitive documents on Radio Noise is the ITU-R Recommendation on Radio Noise, version P.373-12. This (latest) version is dated 07/2015, so it’s only a year old. You can download it [as a PDF] here. It has a lot of info on natural and man-made radio noise.

My favorite graph from the document is shown below:

Graph

It shows the level of radio noise vs. frequency for good and poor conditions. It can be rather surprising how noise, even under the best conditions, can be quite excessive on shortwave frequencies. For example, the best case noise level for 10 MHz is about 30dB above the Johnson Noise level. (That’s the noise level from just a resistor at room temperature.) That’s why the noise level in your shortwave receiver’s speaker gets so much higher when you attach the antenna!

That is fascinating, Steve! It’s no wonder we struggle with noise issues–even in the best of times, it appears.