When Secret Agents In France During Ww2 Were Sending Radio.

[sandyRoe]

...messages back to the UK how did the Nazis know which frequency to scan?

[retrocop]

They just trawled with Radio Direction Finding vehicles

[retrocop]

I was on a yacht that sailed through the night between the Scilly Isles and missed the Wolf Rock lighthouse. A miracle we missed the numerous reefs. When dawn arose we were in a dense fog bank. we called up coastal radio stations and took a bearing on the radio signals to get us back to our intended destination. St Annes I think it was.

[Peter Pedant]

they frobbled across all the frequencies - and then locked on.

British were doing the same. Danish one was good: they scrunched up the morse code into a squash of 5s and transmitted it. The Brits recorded it on ECG tape ( at high speed) and this slowed down the morse . Dot as a spike, and dash as er a dash.

The Germans thought there was no radio traffic. The genius behind this? Prof of Electical Engineering, Copenhagen.

Japanese were not able to understand how the Americans could bomb and torpedo so accurately ( 95% of the marine)  - which was thro good old code breaking. So concluded that it was the POWs on the mainland and planned to massacre them all on 15 Sept 1945/

Phew Lucky huh?  - there is quite  a lot on the internet on this.

The nagasaki POW camp got a message INSIDE the camp: "dont go out on Thursday" - I am not quite sure how you told your captors -  "no work to day ichi-san, all ill or dead...." ( and you wil be too, soon

 

[Peter Pedant]

dja remember DOnald Crowhurst and Teignmouth Electron that DIDN't cross the Atlantic? - a radio ham said there was something very very wrong, before they recovered the boat and his body

[sandyRoe]

Was he cheating in a round the world race?

Couldn't face the ignominy?

[anneasquith]

Pp. I love that you know something about everything .🤔

[sandyRoe]

As do I.  :-)

A jack of all trades and master of none.

[anneasquith]

Sandy, I'd say you are the master of all you survey. 😊

[douglas9401]

With the possible exception of jocular wordplay.

[vulcan42]

Aye, Wikipedia is a wonderful source of information.

[Canary42]

Nick Tomalin's book on Crowhurst makes interesting reading.

[Peter Pedant]

Nick Tomalin went to my college ( Trinity Hall)

[Hymie]

Apparently the life expectancy of an SOE wireless operator in occupied France was around 6 weeks.  So no doubt the Germans had access to the British transmitters and knew their operating frequencies.  Although I believe the sets could change transmission frequency with ease – having mobile detection vans set to receive over a wide frequency bandwidth would allow a change in transmission frequency to be detected.

[Atheist]

The Germans could triangulate transmissions and could, in city areas, home in by cutting power to buildings or storeys to spot the location of transmitters when they blanked out for a few seconds.

[Peter Pedant]

the radios were the size of suitcases and often hauled around on bicycles.

I thought they wre told to transmit from woods, but in gay Paree that wd not  be possible. Carrying a valve, was a capital offence.

Here is my French master

https://en.wikipedia.org/wiki/Henry_Thackthwaite

[sandyRoe]

^. A brave man 

[gulliver1]

Retro 16.08 How come you have done so many heroic deeds and have lived to tell the tale.  What comics did you read as a child.🤣