This was an absolutely wonderful presentation and answered questions about D-Day communications that I didn't even know I had. My Dad went ashore on D-Day plus three and I'm sure that this equipment kept him and other GIs so much safer in their advance on Normandy.
The Germans were using Spiral-4 cable too for their carrier telco systems. This was captured at times and put into use! The question is, did the US copy it from them or was it the other way around?
Thanks for another great report Mike. I first saw the 19 set when I joined Cadet Signals in High School in Canada, back in 1950! Great radio! 73, Shlomo 4X4LF
After restoring one , recapping it and aligning it, I finally learned what this set was. I had seen the lend lease jobs mostly built by RCA Northern Electric in Canada with the Cyrillic markings as an oddity, but had no idea how packed with capability they were. That said, they are a tough radio to use on the ham bands, compared to many other low cost sets that were available surplus after the war!
Brilliant again Mike, thank you. I have often been up St Catherine's HIll but only once to do radio. I never reaslied it was such an important site in the context of D-day. Ventnor is the more famous location on the south coast of the Isle of Wight because of the Chain Home station there.
Excellent presentation Mike! Very well scripted and produced. Great writing and verbal presentation skills are rare amongst engineers, believe me I suffered through many awful ones both as a listener and a reviewer/commenter during their preparation. These DDay videos are A+++! Chris AJ1G Stonington CT
Not saying never, but I was seldom employed as a real pure engineer type like you are talking about. I was more customer facing and applications oriented, so it was sink or swim beyond design - setting to work and training customers on what we designed and supplied. Not that they were not nervous! They even sent me to Dale Carnegie!
Well scripted excellent presentation (Can you confirm) I remember reading an article stating that the British cut the German to American submersible cable at the start of the war. I also read that a transatlantic cable was brought ashore in France after the D-Day landing for wireline telegraphy (teletype) with the states
Nicely done, Mike! I used to have a boatanchor called R-48/TRC-8 that I was told was part of a phone network. Perhaps a little later than this. Miniature tubes. It had some diagnostics built in - it had its own voltmeter! Only radio I’ve ever seen like that. They used to turn up at hamfests sometimes.
I think I thought of something about the way the modulation was done that made the system work better than a "simple minded" explanation of it would suggest. Each of the upper channels was being sent as lower side band. SSB-SC The human voice has most of its amplitude below about 1KHz. This would mean that the carrier would be being whipped back and forth in frequency at rates well outside what would end up as audio band for each output. This includes the base band channel which is not a SSB transmission. Thus each channel of audio was functioning as a spread spectrum for the other channels of audio. A strong jamming carrier couldn't mess up the signal for a time long enough to matter to what comes out of the low pass filter than feeds the headphones. You would get distortion from it but a distorted voice up to a point is just fine for understanding what is said.
I have very little information on whether the Wehrmacht systems were FM-FM Subcarrier or FM with SSB Subcarriers or FM with Full AM Subcarriers. I'm hoping for comments and corrections from the continent!
Excellent video and very good information. One question... Ft Monmouth, PA? In 1967, I attended a US Army Electronics school in Ft Monmouth, NJ. Thank you for sharing this with us. 73 de K7RMJ.
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Thank you for the history. So FM radio played a big part in WWII.
FM had a cheerleader that engineers around the world trusted - Armstrong.
@@MIKROWAVE1You are absolutely right, Major Edwin Howard Armstrong, without his inventions where would Radio receivers be today, TRF sets, God forbid!
This was an absolutely wonderful presentation and answered questions about D-Day communications that I didn't even know I had. My Dad went ashore on D-Day plus three and I'm sure that this equipment kept him and other GIs so much safer in their advance on Normandy.
Very interesting. The Telefunken gear was surprisingly advanced. Thanks for your hard work, Mike. 73
The Germans were using Spiral-4 cable too for their carrier telco systems. This was captured at times and put into use! The question is, did the US copy it from them or was it the other way around?
Thanks for another great report Mike. I first saw the 19 set when I joined Cadet Signals in High School in Canada, back in 1950! Great radio!
73, Shlomo 4X4LF
After restoring one , recapping it and aligning it, I finally learned what this set was. I had seen the lend lease jobs mostly built by RCA Northern Electric in Canada with the Cyrillic markings as an oddity, but had no idea how packed with capability they were. That said, they are a tough radio to use on the ham bands, compared to many other low cost sets that were available surplus after the war!
Thank you for posting this video. Well researched and informative. I enjoy the various topics on your channel.
Thanks for watching - and yes this was a research Rabbit Hole al right.
Brilliant again Mike, thank you. I have often been up St Catherine's HIll but only once to do radio. I never reaslied it was such an important site in the context of D-day. Ventnor is the more famous location on the south coast of the Isle of Wight because of the Chain Home station there.
I wonder if anyone knows where the British and US siting were on the beaches? Caen took a while, so it could not have been that far initially,
I loved this follow up to part 1. Thanks for taking the time to make these videos.
Excellent presentation Mike! Very well scripted and produced. Great writing and verbal presentation skills are rare amongst engineers, believe me I suffered through many awful ones both as a listener and a reviewer/commenter during their preparation. These DDay videos are A+++!
Chris AJ1G Stonington CT
Not saying never, but I was seldom employed as a real pure engineer type like you are talking about. I was more customer facing and applications oriented, so it was sink or swim beyond design - setting to work and training customers on what we designed and supplied. Not that they were not nervous! They even sent me to Dale Carnegie!
Wow, how interesting! I really enjoyed this history / radio / WW2 video.
Thanks for putting this together.
Thanks for watching!
Lots of research you did there. Thank you.
Another really interesting and well-researched episode - thanks Mike. 73 de M1GWZ
Excellent research, Mike! Thanks for all of your effort.
Glad you enjoyed it!
Well scripted excellent presentation (Can you confirm)
I remember reading an article stating that the British cut the German to American submersible cable at the start of the war. I also read that a transatlantic cable was brought ashore in France after the D-Day landing for wireline telegraphy (teletype) with the states
Great Job! Thanks for the great info!
Thanks for watching. I think I have enough information for a third video on what conventional coms systems landed D Day and the first few days after.
Nicely done, Mike!
I used to have a boatanchor called R-48/TRC-8 that I was told was part of a phone network. Perhaps a little later than this. Miniature tubes. It had some diagnostics built in - it had its own voltmeter! Only radio I’ve ever seen like that. They used to turn up at hamfests sometimes.
Yes that is the upgrade that was installed with the British WS-10 later on St. Catherine's mostly late and post war.
This is a good video. Keep them coming
Thanks, will do!
Thanks for the information. Signals don't get mentioned much in documentaries, except as an input for Bletchley Park (Ultra)
I think I thought of something about the way the modulation was done that made the system work better than a "simple minded" explanation of it would suggest.
Each of the upper channels was being sent as lower side band. SSB-SC
The human voice has most of its amplitude below about 1KHz.
This would mean that the carrier would be being whipped back and forth in frequency at rates well outside what would end up as audio band for each output. This includes the base band channel which is not a SSB transmission.
Thus each channel of audio was functioning as a spread spectrum for the other channels of audio. A strong jamming carrier couldn't mess up the signal for a time long enough to matter to what comes out of the low pass filter than feeds the headphones. You would get distortion from it but a distorted voice up to a point is just fine for understanding what is said.
I have very little information on whether the Wehrmacht systems were FM-FM Subcarrier or FM with SSB Subcarriers or FM with Full AM Subcarriers. I'm hoping for comments and corrections from the continent!
@@MIKROWAVE1 I don't happen to know. If someone comes in with that info, I would be interested in a video that explains it.
Very nice.
Excellent video and very good information. One question... Ft Monmouth, PA? In 1967, I attended a US Army Electronics school in Ft Monmouth, NJ. Thank you for sharing this with us. 73 de K7RMJ.
Yes Ft. Monmouth in NJ. The testing was done there and in the mountains west in PA.
✋73's🎙KD9OAM🎧
The Nazis used FM (foreign modulation) we used AM (American modulation). Why no use of satellites?
Technically Hungary was a satellite.
Nice, & 73 de kc2wvb