Author Archives: Thomas

Ham CAP and VOA Prop: Fixing SSN look-up files

VOA Prop

Many thanks to SWLing Post contributor, Paul Evans, who notes:

Users of these two propagation prediction programs will find that they don’t work beyond Dec 2019 because the SSN look-up files didn’t go any further.

I noticed this 2-3 years ago and added to the end of the files required. I entered guesses for solar activity values, but with auto mode turned on they will fetch current values. At least this will get you started again. Or my guesses might be right!! 🙂

For Ham CAP use: http://w4.vp9kf.com/SSN.dat

For VOAProp use: http://w4.vp9kf.com/ssndata.txt

Download them and swap them into the directory where the application is located.

Thanks or the help, Paul!

An app to decode DRM?

DRM broadcast (left) as seen via a KiwiSDR spectrum display.

Many thanks to SWLing Post contributor, Richard Langley, who shares this story by Hans Johnson at Radio World:

Can an App Solve the DRM Receiver Problem? (Radio World)

The Digital Radio Mondiale standard for digital broadcasting in long, medium, and shortwave bands offers the possibility to transmit audio, text and pictures.

A few broadcasters use DRM for both domestic and international transmissions. DRM’s largest problem is lack of receivers, especially affordable standalone ones.

Some listeners use an SDR, computer and free Dream software to receive the DRM signals, but this audience doesn’t make up the mass audience that broadcasters are looking for.

[…]AlgorKorea didn’t develop the apps with the intention of solving the DRM receiver issue. They developed them to resolve a problem with FM hearing aids used in classrooms.

So how do they work? The DRM+SDR version couples the popular and inexpensive RTL-SDR to an Android device with a USB OTG adapter.[…]

Click here to read the full article at Radio World.

 

Shortwave version of the Southgate ARC News

Many thanks to SWLing Post contributor, Harald (DL1AX), who shares the following message from the Southgate ARC:

Southgate News is now on ShortWaveRadio

We now have a regular Sunday morning news broadcast on ShortWaveRadio.de
So tune in every Sunday at 10am UTC on 3975 and 6160 kHz.
The programme is repeated at 14:00 UTC on 6160 kHz and 16:00 UTC on 3975 kHz

Thanks Harald! Southgate is a wonderful source of radio news. I look forward to checking out their shortwave broadcast!

Radio Deal: C.Crane Orphans sale

I just received a newsletter from C.Crane noting that they’re having an “Orphan” sale today (17 January 2020).

“Orphans” are C.Crane returns and open box items that have been tested and evaluated by C.Crane. Orphans are sold at a discount and carry a full 60 day warranty. I’ve purchased a number of Orphan items in the past and have never received a dud.

One of the best deals I see in their list of Orphans is the CC Skywave SSB for $119.99–the lowest price I’ve seen for this particular unit.

Click here to check out other C.Crane items.

Video: Fenu demonstrates the BELKA-DSP receiver

Many thanks to SWLing Post contributor, Dan Robinson, who shares the following video demonstration of the BELKA-DSP receiver by Fenu Duarte:

Click here to view on YouTube.

Thanks for sharing this, Dan.  I must admit, it seems the BELKA-DSP has some excellent receiver characteristics. I like the backlit display and the rugged, simple form-factor. It doesn’t have an internal speaker, but based on Fenu’s video, the audio sounds superb (especially if you’re using a quality amplified speaker like Fenu).

I had planned to review the little BELKA-DSP last fall, but simply had too many in-bound review transceivers. As I knock out some of these reviews, I might have to reconsider!

Alex Buevsky kindly supplied the English language manual for the BELKA-DSP last year. If interested, click here to download the PDF.

Tim Whittaker explains route from proof of concept to development of low-cost DRM receiver

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

Here’s some new news about low-cost DRM receiver advancement, and links to an audio presentation explaining the route from proof of concept to development of a low-cost prototype DRM receiver by Cambridge Development. SWLing Post readers might find it interesting:

(Source: DRM Consortium)

16 Jan Low-cost DRM Receiver Advancement

DRM member Cambridge Consultants recently announced an under 10 USD prototype DRM receiver, which was reported in our Newsletter and widely in the industry press. The prototype receiver was unveiled during an Innovation Day at their offices in the UK. Neale Bateman, Encompass Digital Media and a member of the DRM Steering Board, attended the event and spoke to company representative, Tim Whittaker, to find out why the interest in producing this type of DRM receiver. Listen here

Tim also explained the route from proof of concept to development that has helped Cambridge Consultants to produce this low-cost prototype DRM receiver.  Listen here

Radio Waves: iHeart Layoffs • Radio JK FM • 2nd Chance for Pirates • Invisible War


Radio Waves:  Stories Making Waves in the World of Radio 

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’sRadio Waves, a collection of links to interesting stories making waves in the world of radio. Here’s the first Radio Waves story collection. Enjoy!

‘The Culling Has Begun’: Inside the iHeartMedia Layoffs (Rolling Stone)

The largest radio company in America cut a number of employees this week, dealing a blow to local radio across the country

“The largest radio conglomerate in the country, iHeartMedia, initiated a round of mass layoffs this week, cutting enough people that one former on-air host described Tuesday as “one of the worst days in on-air radio history.” The layoffs were concentrated in small and medium markets, where staffs had already been reduced, striking another major blow to local radio.”

AER (Asociación Española de Radioescucha) Radio JK FM

SWLing Post contributor, Martin Butera, writes:

“Proclaimed in 2011 by UNESCO member states, and adopted by the United Nations General Assembly in 2012 as International Day, February 13 became World Radio Day (WRD). This 2020, on World Radio Day, UNESCO calls on all radio stations to defend diversity, both in their newsrooms and on radio waves. Martin Butera, visited an important FM of Brasilia DF, capital of Brazil and anticipates this year’s motto that will be: “Pluralism, representation and diversity.”

A report in Spanish that Martin invites you to read by clicking here.

Give radio pirates chance to go legit (The Boston Globe)

The massive fines levied last month against two unlicensed Boston stations that served the Haitian immigrant community went too far.

The Invisible War of the Cold War Airwaves (X-Ray Audio)

In the radio show below, an episode of our Bureau of Lost Culture series on Soho Radio, we meet with Russian journalist, broadcaster and writer Vladimir Raevsky to hear the fascinating story of the Soviet Radio Jammers. Vladimir tells of the extraordinary lengths people went to to listen to the music they loved and of the gigantic amount of money spent by both sides in this invisible war of the airwaves.

We also hear from BBC Russian Arts correspondent Alex Kan about the brave / foolhardy so-called Radio Hooligans – the technically savvy young Soviets who dared to risk punishment by setting up their own little pirate radio stations to broadcast themselves and the music they liked using bootlegged and adapted equipment.

And finally we hear the strange story of the signal emitted by The Duga a gigantic mysterious installation near the Chernobyl nuclear site.