Radio Waves: UVB-76 Activity, 90 Years of Broadcasting in Former Czechoslovakia, FM Diversity Reception, and Rescuers use QRP Labs QDX in Cave

Czechoslovak Radio in the mid-1930s, photo: Czech Radio

Radio Waves: Stories Making Waves in the World of Radio

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 Dan Robinson, Rich Cuff, Dennis Dura, and Mike for the following tips:


Russia’s ‘Doomsday Radio’ erupts with coded messages after CIA chief’s Moscow visit (Ynet Global)

The secretive UVB-76 station interrupted its trademark buzzing at least 25 times a day after John Ratcliffe’s visit, reviving speculation over its military role as Baltic states seek to calm fears of a possible Russian attack

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90 Years of International Broadcasting in Former Czechoslovakia – Culture – Rádio RSI English – STVR (Radio Slovakia International)

In 2026, Slovak Radio is marking 100 years since broadcasting began in what was then Czechoslovakia. For most of that time—90 years, in fact—broadcasting to audiences abroad has been an essential part of its story. While Radio Prague International is celebrating its 90th anniversary, Radio Slovakia International is marking 33 years since launching its own international service. This program is dedicated to this shared 90th anniversary.

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Diversity Mode Helps You Unlock Lost FM Channels – Radio World (Radio World)

In 2019, I was about ready to give up the long-distance FM radio listening hobby.

All right, maybe that’s a bit of an exaggeration. FM DXers in particular are known in our small circles to go through phases of frustration. The hobby is not for the faint of heart. There are only so many opportunities in a calendar year to catch unique propagation events such as E-Skip, even if your dial conditions are optimal!

And for FM DXers, the best analogy I’ve heard applies the concept of fishing lines to the conditions that make our hobby run.

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Rescuers use new tech to save caver trapped vertically in Alberta’s ‘Psych Squeeze’ | CBC News (CBC)

A caver has been rescued after being trapped vertically underground at the Rat’s Nest Cave in Canmore, Alta., in an operation that deployed volunteer-built underground radio technology for the first time.

Search and Rescue Alberta says the man became pinned in a tight spot known as the “Psych Squeeze” around 11:30 a.m. on Saturday.

[Continue reading…]


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