SiriusXM offers channel and free stream devoted to Covid-19 awareness

Doctor Radio & NYU Langone Health launch 24/7 coronavirus-focused channel & hotline

SiriusXM, in conjunction with NYU Langone Health, launched a special 24/7 channel dedicated to providing the public with the latest information on the coronavirus outbreak. The channel launched on Friday, March 6 at 6pm ET and features programming from SiriusXM’s Doctor Radio (Ch. 110). It is available on both active and inactive SiriusXM radios on Channel 121 and will also be available on the SiriusXM app and via SiriusXM.com.

Click the link below to hear an exclusive, free livestream of the channel.

Click here to listen now.

Click here to read the full announcement.

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FTIOM & UBMP, March 15-21

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From the Isle of Music, March 15-21:
This week, our special guest is Ruly Herrera, leader of Real Project, which recently released GES, a tribute to Grupo de Experimentación Sonora del ICAIC, one of the most musically transformative groups of 20th-Century Cuba.
The broadcasts take place:
1. For Eastern Europe but audible well beyond the target area in most of the Eastern Hemisphere (including parts of East Asia and Oceania) with 100Kw, Sunday 1500-1600 UTC on SpaceLine, 9400 KHz, from Sofia, Bulgaria (1800-1900 MSK)
If you don’t have a shortwave radio or are out of range, you can listen live to an uplink from a listening radio in the Netherlands during the broadcast at
http://websdr.ewi.utwente.nl:8901/?tune=9400am
2. For the Americas and parts of Europe, Tuesday 0000-0100 (New UTC) on WBCQ, 7490 KHz from Monticello, ME, USA (Monday 8-9PM EST in the US).
If you don’t have a shortwave or are out of range, you can listen to a live stream from the WBCQ website here (choose 7490): http://www.wbcq.com/?page_id=7
3 & 4. For Europe and sometimes beyond, Tuesday 1900-2000 UTC and Saturday 1200-1300 UTC on Channel 292, 6070 KHz from Rohrbach, Germany.
If you don’t have a shortwave radio or are out of range, you can listen live to an uplink from a listening radio in Europe.
Visit our Facebook page at https://www.facebook.com/fromtheisleofmusic

Uncle Bill’s Melting Pot, March 15 and 17:
Episode 156 takes us to Burkina Faso.
On WBCQ only, there is a second half-hour featuring one of the first episodes of our show in 2017.
The transmissions take place:
1.Sundays 2200-2300 NEW UTC (6:00PM -7:00PM Eastern US) on WBCQ The Planet 7490 KHz from the US to the Americas and parts of Europe
If you don’t have a shortwave or are out of range, you can listen to a live stream from the WBCQ website here (choose 7490): http://www.wbcq.com/?page_id=7
2. Tuesdays 2000-2030 UTC on Channel 292, 6070 KHz from Rohrbach, Germany for Europe.
If you don’t have a shortwave radio or are out of range, you can listen live to an uplink from different web SDRs in Europe.
Visit our Facebook Page at https://www.facebook.com/UncleBillsMeltingPot

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Airspy Youloop and Homebrew Passive Loop Antenna designs

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Almost two weeks ago, at the 2020 Winter SWL Fest, I gave a presentation called “A New Era in Portable SDR DXing.”

The presentation was essentially an in-depth version of an article I published in the January 2020 issue of The Spectrum Monitor magazine (see cover above).

I devoted a good portion of the presentation describing how to build a passive loop antenna design by Airspy’s engineer and president, Youssef Touil. This passive mag loop takes advantage of the Airspy HF+ Discovery‘s exceptionally high dynamic range and is an impressive performer.

The homebrew loop on the balcony of a hotel.

You may recall, I posted a short article about this loop in November after enjoying a little coastal DXing.

In short? This passive loop antenna pairs beautifully with the Airspy HF+ Discovery. I’ve also been very pleased with results using the new SDRplay RSPdx on the mediumwave band where the receiver now sports a high dynamic range mode.

Overdue corrections…

After returning from the Winter SWL Fest last week, I was hit with an upper respiratory bug. No doubt, a souvenir of my travels! It wasn’t the flu (I was tested), nor COVID-19, but it did knock me off my feet for a few days with fever, coughing, and headaches. You might have noticed a lot less posts last week and almost no replies from me via email. I’m only now feeling totally human again and trying to catch up with my backlog.

Shortly after my SWL Fest presentation, I realized I made (at least!) two mistakes. I had planned to post corrections here on the SWLing Post last week, but the bug delayed all of that, so here you go:

#1 Schematic of my homebrew passive loop antenna

When Youssef started experimenting with passive loop antenna designs, he posted a few schematics of at least three build options.

Although I described how to build my passive loop antenna, I grabbed the wrong schematic for my presentation slides. Many thanks to those attendees who noticed this.

Here is the schematic I should have shared:

Note that the transformer has four turns on both sides (the one in the presentation had 4:2).

Again, apologies for any confusion.

#2 The Airspy Youloop passive loop antenna

If you’re not inclined to build your own passive loop antenna per the diagram above, Airspy is planning to manufacture and sell a lightweight, high-performance loop of a similar design.

Prototype of the Airspy Youloop in the field (note bright blue cable jacket)

During the presentation, I called the future AirSpy antenna, the “Spytenna.” I was incorrect. (Turns out, I got this name from an early antenna schematic and somehow it stuck in my head!)

Airspy is calling their passive loop antenna the Youloop. Youssef posted the following note in the Airspy email discussion group:

We are currently arranging the shipping of the affordable passive version to Airspy.us and RTLSDR Blog.

Btw, It’s called “Youloop”

Many thanks to Richard Langley and a number of other readers who pointed this out last week.

I’ve had a prototype of the Youloop since November and brought it to the SWL Fest and presentation. It’s a quality antenna and incredibly compact when disassembled and rolled up.

When the Youloop is available to order, we’ll post links here on the SWLing Post.

More to come!

Once I catch up here at SWLing Post HQ, I plan to publish detailed construction photos of the homebrew loop antenna.

Many of you have questions about how to tap into the center conductor at the mid-point of the loop. These photos should help guide you.

Stay tuned!

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Your support makes articles like this one possible. Thank you!

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Steve’s crusade to obtain KGAF license plate

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Many thanks to SWLing Post contributor, Dan Van Hoy, who shares the following item from WFAA:

GAINESVILLE, Texas — A North Texas radio station that the Texas Department of Motor Vehicles determined had call letters that were too “vulgar” to put on a personalized license plate finally has those formerly vulgar letters proudly affixed to its one station vehicle.

It’s a victory thanks to a Gainesville-area lawmaker who decided a bit of common sense was in order.

Late last year KGAF station manager Steve Eberhart started the process, applying to have KGAF on a personalized license plate for their company van. The station has been a fixture in Gainesville since 1947. But in a modern world that sometimes communicates in OMGs, LOLs, IDKs and IMHOs, the state told him that KGAF might mean something, too.

“Well, I’ve been told that it’s an acronym or a slang for social media for ‘can’t give a (expletive),” Eberhart said. “But certainly we never intended that,” he told me several weeks ago. “I can assure you the people in 1947 did not intend for it to mean that!”[…]

Click here for the full story at WFAA.

That is a riot, Dan! Thank you for sharing. I’m glad someone finally came to their senses and gave Steve his plate!

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Dean solves second interval signal mystery

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(Image source: Madrid.org)

In response to our second mystery interval signal challenge, SWLing Post contributor, Dean Bianco replies:

Mystery solved!

This is the “interval signal” (more accurately, a placeholder with a musical station identifier) for the Compañía Telefónica Nacional de España (CTNW) from Madrid, Spain.

They were a point-to-point HF radiotelephone terminal that provided overseas telephone and telegraph services in the days before satellites became common.

As a young SWL, I would receive all manner of strange musical identifiers for these utility stations. Most of these HF telecommunication services had gone to satellite by the early 1980’s. The HF bands were chock-a-block with signals, whether they be broadcast or utility services.

Glad to help!

To verify his claim, Dean shares the following embedded audio file made by Willi Passmann in the mid 1970s (via the excellent UtilityRadio.com website):

Well done, Dean! Thank you once again for coming to the rescue!

In case you didn’t know, dear readers, Dean Bianco is a force to be reckoned with in the shortwave radio world. 🙂 This year, he won the 3rd Annual Fest Trivia Quiz at the 2020 Winter SWL Fest! An impressive accomplishment, indeed. Not only that, but Dean’s an incredibly nice guy, great friend, and always willing to help out those new to the hobby!

Thank you, Dean!

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Radio Northern Europe International and This is a Music Show broadcasts

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Many thanks to SWLing Post contributor, Roseanna, who shares the following announcement posted on her blog [with apologies for the late plug!]:

Radio Northern Europe International has worked with This is a Music Show to make a broadcast consisting of 30 minutes of RNEI and 30 minutes of TIAMS, that’s 1 hour of great music!

We really love what TIAMS has made for us and we can’t wait to share it with you!!

Radio Northern Europe International show #2 will have music from Iceland, Norway, Ireland, Sweden, Denmark and Finland this month, I really love the music we are playing and we hope to introduce you to some new music this month!
Songs 4,5 and 6 are my favourites this show!

Broadcast Times:
We have good news to those of you not in Europe and those of you nearer the transmitter, multiple times throughout the month! RNEI #2 will broadcast 5 times on 6070 kHz at the following times:

Saturday the 7th of March 2020, 10-11UTC
Saturday the 7th of March 2020, 19-20UTC
Friday the 13th of March 2020, 11-12UTC
Saturday the 21st of March 2020, 19-20UTC
Sunday the 29th of March 2020, 01-02UTC (this time is very experimental!)

Digital modes:
In RNEI Show #2 the final song will have the MFSK32 embedded into it. This time: text, Emoji and some Icelandic art! (Note, an app like TIVAR shows the emoji!)
TIAMS’ contribution will contain some MFSK64 text and an MFSK64 image!
Many thanks to one of our listeners for suggesting our final MFSK song!

Audio Processing:
This show Daz has been working hard making an audio processor to try and expand the audio range of RNEI! We have decided on trying to broadcast a flat signal to combat the noise floor. This means that the highs might come across a bit too bright and the bass might feel bit lacking.
Don’t worry, a little bit of EQ on the receiver should reverse it ending up with a better frequency range than before! Most standalone radios should already apply a high frequency reduction however SDRs can omit this!

You can send your reception reports, feedback and suggestions for RNEI to [email protected]!
Wishing you good reception conditions and all the best,
-Roseanna

For more info, check out Roseanna’s blog.

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Radio Waves: Eugène Aisberg, Filter Design, ABC Workers Face Cuts, and Data via Web SDRs

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Radio Waves: Stories Making Waves in the World of Broadcasting

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’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Paul, Marty, and Michael Bird for the following tips:

Eugène Aisberg, Radio Writer (OneTubeRadio.com)

After a wartime absence, the January 1946 issue of Radio Craft carried an article by writer Eugène Aisberg. While that name might not be familiar to American readers, Aisberg was a prolific author in the early days of radio, and wrote some of the best treatises on radio for the popular audience. He was fluent in French, Esperanto, German, Russian, and English.

Aisberg was born in Odessa, Ukraine, in 1905, and lived most of his life in France. He was the director of the French magazine Toute la Radio and a prolific author of a number of books. His most popular book, which is still in print, is La Radio? Mais c’est très simple (Radio? But It’s So Simple!) The book, currently in its 29th edition, an extremely solid background covering all aspects of electronics, and is written in a popular, easy-to-read style. While the book was ultimately translated into several languages, it was apparently never published in English.[…]

Filter Design Software (Nuts and Volts)

If you’ve ever lived close to an AM broadcast station, you probably experienced the phenomenon known as fundamental overload. It occurs when a receiving device is functioning entirely properly but unable to reject a strong signal. The receiver might be a wireless telephone, a scanner, or even a TV or radio receiver. The AM signal is completely legal but just too strong, disrupting the function of the receiver or overriding the desired programming.

[…]Hams often experience fundamental overload on the 160 meter band (1.8–2.0 MHz) which is adjacent to the AM broadcast (BC) band (550 kHz–1.7 MHz). Antennas for those frequencies pick up a lot of AM band RF, overloading the input circuits and creating distortion or false signals inside the receiver. The usual solution is to install a high-pass broadcast-reject filter at the receiver input, attenuating the unwanted AM signals below 1.6 MHz while passing the desired 160 meter signals with little attenuation.

So far, so good, but a filter that doesn’t attenuate signals very much above 1.8 MHz while attenuating them significantly in the adjacent broadcast band is not a simple thing to design. There are tables and equations, but they are tedious to work with. Practically, you’ll need to build the filter with standard-value components as well, and that will affect filter performance too. Sounds like a job for some filter design software, doesn’t it?

There are several filter design software packages ranging from simple calculators to sophisticated CAD programs. Luckily for hams and other experimenters, there are plenty of free or low-cost programs to try.[…]

ABC workers face anxious wait over job, program cuts (The Age)

David Anderson did not mince words at a Senate Estimates hearing last October. “There will be job losses,” ABC’s managing director warned. “It’s not something I can quantify at this point in time. There’s still more work to be done.”

Towards the end of March, Anderson will reveal a five-year plan for the national broadcaster. To the frustration of staff, it’s unlikely to specify which parts of the organisation will bear the brunt of these cuts or how many workers they might lose.

Several senior sources spoke about the situation at ABC on the condition of anonymity, given sensitive funding negotiations are yet to be finalised.

“All these media reports claiming the redundancy numbers will be finalised in March are just wrong,” says one ABC executive. “What we need is some clarity [about long-term resourcing] from the government.”[…]

Receiving Data With Web Based Shortwave Radios (Nuts and Volts)

Your computer and the Internet give you free access to over 100 web based shortwave receivers that you can use as if they were your own. Unfortunately, employing these radios to decode data transmissions can be very difficult or impossible — unless you know the secret. So, read on and we’ll guide you through the details of how to do it.

Web based shortwave radios are an amazing new implementation of software defined radios (SDR). These SDRs are free to use and widely available on the Internet. Even more remarkable is that they are located in countries all around the world.[…]