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http://forum.axishistory.com/viewtopic. ... 054#603054
bregds
SES
Funkmess-Täuschungsgeräten (FuMT).
Trick used by WW1 U Boat Service
This is a short reprise of a story I read once in a communications magazine. It fits in with Taueshungsgeraete (Deception Equipment).
Before the US entered World War 1 there was a German commercial radio
station on the US coast, in New Jersey I think. It would send out tones that quickly changed, tones which made no sense. This was before radio
teletype. Many radio shortwave listeners listened to these tones, wondering what they were.
One enterprising amateur listener had acquired a device from Germany that recorded signals on wire. He recorded some of these signals and played them back. He discovered that they were Morse code in the clear.
The German station was sending messages in Morse code to submarines in the Atlantic. They merely speeded them up so no one could copy them.
The Federals were notified of this violation of law. It took the US government about 90 days to shut down the German radio station.
The wire recorder (and tape recorder) came to the U.S. in 1945. But the
Germans (who were ahead of us in magnetics) had them in WW1.
Before the US entered World War 1 there was a German commercial radio
station on the US coast, in New Jersey I think. It would send out tones that quickly changed, tones which made no sense. This was before radio
teletype. Many radio shortwave listeners listened to these tones, wondering what they were.
One enterprising amateur listener had acquired a device from Germany that recorded signals on wire. He recorded some of these signals and played them back. He discovered that they were Morse code in the clear.
The German station was sending messages in Morse code to submarines in the Atlantic. They merely speeded them up so no one could copy them.
The Federals were notified of this violation of law. It took the US government about 90 days to shut down the German radio station.
The wire recorder (and tape recorder) came to the U.S. in 1945. But the
Germans (who were ahead of us in magnetics) had them in WW1.