Tag Archives: Israel

Radio Waves: “Tuning In The World”, Subcarrier Signals, SSTV Event from the ISS, the Zeptosecond and Israel Army Radio Shut Down

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

Many thanks to SWLing Post contributors Tracy Wood, Dennis Dura, John Forsyth, and the Southgate ARC for the following tips:

Tuning In The World (Far From Home)

When David Goren was 13 years old, he and his family went to visit their Uncle Lou.

“He was usually just railing about my long hair or criticizing rock and roll,” he recalled. But this time was different. “He gave me an old radio of his that had a shortwave band on it. I really didn’t know what that was. I asked my dad, and he was like, ‘You won’t hear anything on that!’”

David was curious, though, so after he got home, he turned it on, started fidgeting with the dial, and was amazed to discover sounds and music from around the world![…]

Click here to read the full post and click here to subscribe to the Far From Home podcast.

Subcarrier Signals: The Unsung Heroes of the FM Dial (IEEE Spectrum)

How subcarrier radio signals made room for hidden FM stations—and helped ensure that everyone has access to the news

A version of this post originally appeared on Tedium, a twice-weekly newsletter that hunts for the end of the long tail.

In our modern era, we tend to choose devices with as many functions as possible, and we bristle at the thought of an object with a single use—hence why umbrellas can be so frustrating to carry around. But sometimes, a single use case is exactly the right level of functionality. This is something I’ve been thinking about recently after I got my hands on a fairly large radio that has literally one function: You turn it on and a specific station plays, and there’s no surface-level way to do anything else with it.

This is a weird device—but for its niche, this device, called a subcarrier radio, was perfect. And it was one of many niches that subcarrier radios made possible.

What the heck is a subcarrier radio signal?
In 1985, a South Florida Sun-Sentinel article discussed a potentially lucrative offering for the owners of FM radio stations: ways to make extra money from parts of the licensed signal they weren’t already using.

This phenomenon was not unusual at the time; the practice had been around for decades. But what the article highlighted were the numerous ways radio signals were being used that the average listener was likely not even aware of—for background music, for stock reports, even to transmit computerized data.

And while station owners weren’t earning a ton of extra money—a single lease brought in US$1,400 a month (about $3,500 today)—for a struggling station, the additional revenue could mean the difference between being in the red and being in the black.

The thing that allows many radio stations to monetize their signals in this way is, essentially, a technical gap inside the FM broadcast signal. These gaps, or subcarriers, are frequencies that aren’t being used for the primary signal but could find secondary uses in more specialized contexts.[…]

Amateur Radio on Shuttle, Mir and ISS (Southgate ARC)

ARISS report there will be an ‘Amateur Radio on Shuttle, Mir and ISS’ Slow Scan TV (SSTV) event from June 21-26. Transmissions from the International Space Station will be on 145.800 MHz FM using PD120

The ARISS team will be transmitting SSTV images continuously from June 21 until June 26. The images will be related to some of the amateur radio activities that have occurred on the Space Shuttle, Mir space station and the International Space Station.

The schedule start and stop times are:

Monday, June 21 – Setup is scheduled to begin at 09:40 UTC (transmissions should start a little later).

Saturday, June 26 – Transmissions are scheduled to end by 18:30 UTC.
Downlink frequency will be 145.800 MHz and the mode should be PD120.

Those that recently missed the opportunity during the limited period of MAI transmissions should have numerous chances over the 6 day period to capture many (if not all 12) of the images.

Check the ARISS SSTV blog for the latest information
http://ariss-sstv.blogspot.com/

The signal should be receivable on a handheld with a 1/4 wave whip. If your rig has selectable FM filters try the wider filter for 25 kHz channel spacing.

You can get predictions for the ISS pass times at
https://www.amsat.org/track/

Useful SSTV info and links
https://amsat-uk.org/beginners/iss-sstv/

Meet the zeptosecond, the shortest unit of time ever measured (Space.com)

Scientists have measured the shortest unit of time ever: the time it takes a light particle to cross a hydrogen molecule.

That time, for the record, is 247 zeptoseconds. A zeptosecond is a trillionth of a billionth of a second, or a decimal point followed by 20 zeroes and a 1. Previously, researchers had dipped into the realm of zeptoseconds; in 2016, researchers reporting in the journal Nature Physics used lasers to measure time in increments down to 850 zeptoseconds. This accuracy is a huge leap from the 1999 Nobel Prize-winning work that first measured time in femtoseconds, which are millionths of a billionths of seconds.

It takes femtoseconds for chemical bonds to break and form, but it takes zeptoseconds for light to travel across a single hydrogen molecule (H2). To measure this very short trip, physicist Reinhard Dörner of Goethe University in Germany and his colleagues shot X-rays from the PETRA III at Deutsches Elektronen-Synchrotron (DESY), a particle accelerator in Hamburg.[…]

Defense minister says he is sticking to plan to shut Army Radio (The Times of Israel)

Defense Minister Benny Gantz reiterated on Wednesday his belief that Army Radio should not continue in its current format as part of the Israel Defense Forces.

“I think that IDF soldiers must be kept as far as possible from any political involvement, and the station should be apolitical, and it has long stopped being so,” Gantz said in response to a query from Shas MK Moshe Abutbul on the Knesset floor. “I don’t think there is any way to operate Army Radio in its current form, largely due to the political angle.”[…]

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Dan’s QSL signed by Miki Gurdus

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Regarding our recent post about Miki Gurdus, SWLing Post contributor Dan Robinson, writes:

Went through my books and found it, the Gurdus handwritten note to me. It appears to have been during a visit he made to Washington, likely in the period I was in college 1975-1979 but could have been later during the 80’s or 90’s.

It reads: “To Dan — In Memory of a joyful day in Washington. Michael Gurdus.”

Amazing! Thank you for sharing your memories, Dan.

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“Farewell to Miki Gurdus, Israel’s National Listener”

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(Source: The Tablet via Richard Cuff)

With a powerful shortwave radio and a battery of TV screens, he broke national news long before the internet, scooping everything from the Entebbe raid to the first Gulf War

Had he been born two or three decades later, Miki Gurdus would probably have been just another middle-aged man glued to his smartphone, scrolling through endless torrents of social-media ephemera. But Gurdus, who passed away in Israel this week at the age of 73, was born with a radio. And early on, he knew the device would change his life.

[…]And listen Gurdus did. Commanding six languages—Hebrew, English, Arabic, French, Russian, and Polish—as well as numerous shortwave radios and as many as 11 television sets, he tuned in not only to broadcasts from far and wide but, often, to private conversations, military wire exchanges, and other dispatches not meant for public consumption. In late June of 1976, for example, he interrupted a radio broadcast to announce that he had just picked up a conversation between Palestinian terrorists and an air traffic controller in Libya announcing that they had just hijacked an Air France flight and intended to land it in Benghazi en route to Entebbe, Uganda. It wouldn’t be his last scoop: In 1990, when Saddam Hussein invaded Kuwait, Israeli military intelligence got the news from Gurdus, who had intercepted the transmissions of the Iraqi army.

[…]With each passing decade, Gurdus’ fame grew. A reporter interviewing him in 2003 described his office as “half Aladdin’s cave and half control tower, a labyrinth of television screens, radios, remote controls, electric wires, speakers, model airplanes and photos of Saddam Hussein and George W. Bush stuck on the walls.” And in the center of it all was Gurdus, tartan slippers on his feet and dark shades covering his eye, to protect his vision from the glare of a dozen screens. Even as Israel’s media landscape flourished and more and more commercial radio and television channels debuted, giving rise to new generations of reporters, anchors, and celebrities, Gurdus remained a national treasure, a name you knew even if you weren’t sure exactly what “our listener” did.

And then came the internet.

Gurdus, in his typical tough manner, minimized it, calling it just another arrow in his quiver. “The internet is just another tool for me,” he said in a recent interview, “and not a major one at that because you can’t compete with what’s broadcast on all these satellites. Besides, neither the internet nor anything else can make me stop working, or make me irrelevant. I’ll continue to report the news, to listen, and to try and deliver scoops. I’ll be there for as long as I’m breathing.”[…]

Earlier this week, Gurdus passed away in his home in Yehud. Prime Minister Netanyahu and President Rivlin both eulogized him, the latter calling him “our mythological listener, the man who brought into our nation faraway voices even before the internet.”[…]

Read the full article at The Tablet Magazine.

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A quick view of my shack in Oxford, UK & recent transatlantic medium wave DX

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Someone recently described my shack in Oxford as ‘an impressive mess’…. and that really is just about the most positive comment I’ve ever received regarding my listening post! So, my apologies for displaying the mess in public, but in response to having been asked many times by subscribers to Oxford Shortwave Log to ‘share my shack’, here it is, well most of it at least, in all it’s unadulterated glory.

The primary reason however for this post is to share my most recent transatlantic medium wave catches using the brilliant Elad FDM DUO and Wellbrook ALA1530 magnetic loop antenna. This excellent combination continues to pull in really nice DX, although not so much very recently as propagation has been fairly rubbish. However, since early to mid December, the dynamic duo have managed to pull in a number of transatlantic medium wave signals, including Radio Rebelde, Cuba on (670 and 710 kHz), KVNS Texas, CHIN Radio, Toronto, WFED Washington DC, WWNN Health and Wealth Radio, Pompano Beach, Florida, and huge signals from WMEX Boston and WWKB Buffalo, New York. Embedded reception videos and text links follow below and in the mean time, I wish you all great DX!

Click to watch on YouTube

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.

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