Old radio disconnector when the cold war was going.

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KD5SPJ

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I seem to remember that old AM BC radios had some sort of receiver built in to turn them off after a a Civil Defense transmission ended.I also seem to remember it was so the enemy would not be able to hone in on their signals.
 

wtp

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way back

i remember as a kid seeing the CD spots on the radio but never heard of a turn off circuit.
i has my hands in many a radio
if you mean to home in on the I.F. then they would be about 20-30 feet away and that would be way too close!
 

KD5SPJ

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Albuquerque New Mexico
i remember as a kid seeing the CD spots on the radio but never heard of a turn off circuit.
i has my hands in many a radio
if you mean to home in on the I.F. then they would be about 20-30 feet away and that would be way too close!

I know which is why it was discontinued. It might have been on CD radios only but I'll see if I can find it again.
 

wtp

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oh

i got ya the transmitter shut down
they played the shell game
if you tried to get a fix on the transmitter you could pinpoint where everything was (pre gps)
i think it would have been better to get everyone to stay on and on the same frequency (too late)
 
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