Tag Archives: WWII

“Crystals Go To War”: A 1943 film about the production of Signal Corps radio crystals

Many thanks to SWLing Post contributor, Charlie (W4MEC), who shares this fascinating film which documents the production and calibration of crystals in 1943. I had no idea of the amount of labor and attention to detail this process required–an absolutely fascinating process:

Click here to view on YouTube.

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David Vaughan on Czech radio and the role of propaganda leading up to WWII

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

Many thanks to SWLing Post contributor, John Palmer (KC8RZM), who writes:

Was listening to Radio Prague yesterday evening, there was a very interesting item where author, David Vaughan, was interviewed and talked about his most recent book “Hear My Voice” a novel which deals with the lead-up to WWII and in which Czech Radio plays a part:

Click here to view on Amazon (affiliate link).

The play, on which the novel is based, was commissioned by Czech Radio and was awarded the Czech Book readers’ award for 2015. In the interview the importance of this then new technology called radio was discussed and its influence, for good or bad, in the world at large, an interesting parallel to today’s discussion on the role of the internet and social media. From the capsule bio on the book cover his background is in languages and radio (BBC and Czech Radio).

I’m sure his other book, Battle of the Airwaves: Radio and the 1938 Munich Crisis, will be of interest to shortwave listeners:

Click here to view on Amazon (affiliate link).

From the Amazon description:

“1938 was a turning point in the histories of Europe and the media. When Hitler annexed Austria and then turned his attention to Czechoslovakia, radio was at the heart of events. Battle for the Airwaves looks at the Munich crisis as it was played out on the radio stations of Czechoslovakia, Germany, Britain and the United States, and reveals just how central a role radio played in the run-up to the Munich Agreement and beyond. It is a story of propaganda and counter-propaganda, censorship and self-censorship. It is also a story of courage and innovation. Munich was a fateful step in the road to World War Two; it also marked the beginning of the age of the electronic media. Published in English and Czech in a single, illustrated, hardback volume, Battle for the Airwaves is accompanied by a CD recording of key British, Czechoslovak, German and American radio broadcasts from 1938.”

Anyway, just thought the above might be of interest to others at the SWLing Post. I’d like to learn more from him on the role of radio in those early days on the events leading up to WWII. I’m probably going to check out his novel.

Thank you so much for sharing this John! I received an Amazon gift card and have already put Hear My Voice in the cart. I look forward to reading it!

I missed the live broadcast, but did find Pavla Horáková’s interview with David Vaughan on the Czech Radio website. Here’s the introduction and audio:

Earlier this year the Czech Republic marked the 80th anniversary of the Munich Agreement, signed in September 1938 by the leaders of Germany, France, Great Britain, and Italy, resulting in the annexation of the Sudetenland by Nazi Germany. Radio Prague’s David Vaughan recently published a book in the UK titled “Hear My Voice”, most of which is set in Czechoslovakia in the months preceding the Munich agreement. Its narrator is an interpreter for the international press corps in Prague and he watches the events of 1938 unfold in Central Europe as the atmosphere is getting tenser ahead of the outbreak of the Second World War. Pavla Horáková spoke to David Vaughan and their conversation begins with a few paragraphs from the book.

Click here to download the MP3 audio of this interview.

Check out the full story and listen to the interview via Czech Radio/Radio Praha.

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75 years ago today: “Christmas Eve at the Front,” a ground-breaking global broadcast

How would Christmas Eve at the Front have sounded on a radio back in 1943?  Something like this…


Christmas Eve, 1943:  America’s third in WWII.

On this day, exactly three-quarters of a century ago, America tuned into a special live broadcast that would not only engage American listeners, but also every major network in the US at the time: CBS, NBC, and Mutual Broadcasting Company.  The simulcast program, “Christmas at the Home Front,” starred troop entertainment veterans Bob Hope and Bing Crosby, as well as numerous others including screen actor Lionel Barrymore–also well-known for his regular portrayal of the miserly Scrooge in NBC’s annual radio drama “A Christmas Carol”–and featured an address by then-President Franklin D. Roosevelt.

This broadcast also included live audio feeds from North Africa, Italy, New Guinea, Guadalcanal, New Caledonia, China, India, Panama, Alaska, Pearl Harbor and even Navy ships in undisclosed locations. Keep in mind, this was 1943. These audio feeds weren’t carried over the Internet or a satellite network, they were shortwave radio signals from remote sites–signals that were bounced off of the ionosphere and back to the studios where they were incorporated in a live radio show.  No doubt, this holiday special required months of planning to orchestrate and perhaps even a leap of faith to execute.

Being something of a WWII radio buff, I’ve listened to this recording a few times in the past. And after receiving Bill’s message about it recently, I listened again; the audio obviously came from a recording at NBC studios, very pristine considering the recording’s age and the number of times it’s likely been copied or changed formats, but also with demarcated track switches, not exactly as it would have sounded on the air at the time.

Radio broadcast with entertainer Bob Hope, 1943. Source: Broadcasting and Recorded Sound Division, Library of Congress

So I did what any self-respecting radio geek would do: I fed the recording into an AM transmitter to recreate the sound as it might have played on American radios of the time, and made an off-air recording of the entire broadcast.

Hopefully now, with the help of this recording, you may be able to imagine what families on Christmas Eve in 1943, huddled around their radios, might have experienced as they strove to feel a little closer to loved ones serving in the war, while enjoying a little light entertainment and absorbing the latest message from their president.

But it’s also meaningful to note that times have certainly changed since 1943.  Without a doubt, it’s often easy to be lulled into a nostalgic appreciation of that time, and former times generally, made all the rosier by the present knowledge that the outcome of the war was, in many respects, favorable to us.  But those who know history know the truth: that war is hard, that our struggles both here and abroad were real, and that people died–as many as 85 million.  When the drama was over, the fallen did not rise again to play in another film; they were gone, forever.  This is the grim shadow that lies beneath the warmth of entertainment broadcasts like this one.

Fortunately, our civilization continues, and will always view the war and the political circumstances surrounding it through the fading glass of advancing time and hear it through the crackle of increasing distance.  And fortunately, our then-enemies are now among our strongest allies.  We have a diverse and international audience here at the SWLing Post, so I hope this recording is recognized for what it is: simply a moment in entertainment history that the passing of time allows us to enjoy, during a war the likes of which we hope never again casts such a shadow over us.  One such was enough.

Now sit back, close your eyes, and set your time machine’s dial back to Christmas Eve, 1943…

Imagine you’ve just turned on the family console radio, the frequency dial gradually warming with its familiar glow, and have tuned to your local NBC station; soon, the voices of well-known entertainers begin to fill the parlor and the rest of the household, their tasks or play momentarily abandoned, quietly join you there to listen…

Click here to download this recording.

Many thanks to SWLing Post contributor, Bill Hemphill, who reminded me of this show recently when he shared this excellent feature article from the American Legion website

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The temporary impact of Allied bombs on the ionosphere

Many thanks to a number of SWLing Post contributors including, Mike, Dan, Ron and Bob who all shared this article from the BBC World Service:

The bombs used by Allied forces during World War II were so large, they weakened the Earth’s upper atmosphere.

The air raids turned towns to rubble and ash, but now new research shows shockwaves could be felt up to 1,000 km above the UK.

Chris Scott, from the University of Reading said: “I was absolutely astonished [when I found out].

“Each raid released the energy of at least 300 lightning strikes.”

It’s now hoped the research will give us a better understanding of how natural forces such as lightning, volcanic eruptions and earthquakes can affect Earth’s upper atmosphere.

[…]But Chris Scott admits “these were very temporary effects which heated the atmosphere very slightly.”

[…]Chris Scott said: “This [research] is really important if we’re going to understand the ionosphere as a whole.

“We know the ionosphere is controlled by solar activity but it varies much more than can currently be explained.”[…]

Click here to review the full article at the BBC World Service.

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Radio World features a tribute to the Zenith Transoceanic

Many thanks to a number of SWLing Post contributors who’ve shared a link to this excellent article by Denny Sanders in Radio World Magazine about the history of the Zenith Transoceanic:

Zenith Trans-Oceanic Radio in War and Peace

This iconic portable receiver was known for durability and quality

They say necessity is the mother of invention. Nothing proves this more than the story of how the iconic Zenith Trans-Oceanic portable radio receiver came into existence.

Commander Eugene McDonald (1886–1958), the founder of Zenith Radio, was a stickler for quality and insisted that any Zenith product represented cutting edge technology and design integrity.

He was also an accomplished yachtsman. During his many ocean voyages, he constantly was frustrated with the inability of any portable commercial radio set to perform reliably at sea. In about 1939, he ordered the Zenith R&D department to come up with a rock-solid, portable AM receiver sensitive enough to pull in signals from great distances. He insisted that the radio be a multi-band unit including shortwave, marine and aircraft bands.

The Zenith crew came up with a gem: the Trans-Oceanic, a gorgeous piece of engineering housed in a robust and dramatic cabinet designed by the brilliant Zenith industrial designer Robert Davol Budlong.[…]

Continue reading the full article at Radio World Magazine online.

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