[BC] Noisy Audio Chain

[Robert Meuser]

Sounds like possible RF feedback.

R




Tom Dimeo wrote:

>Quite often WWII 720 leaves their carrier on all night. There 
>is so much high frequency noise on the signal that I can hear 
>it eight to ten kHz on either side of center. It sounds like 
>there is a blank tape playing. There is also some sixty and I 
>think one hundred twenty Hz hum on the signal.
>
>Is it normal for an audio chain to be so noisy? I realize 
>that the audio processing will bring up the noise but it is 
>much louder than I'd think it should be.
>
>My experience goes back to the sixties and I know what noise 
>modulation like this would do to the modulator tubes of the 
>transmitter, is it as hard on a solid state transmitter?
>
>
>Just curious.
>
>I've given up calling the station and telling them about the 
>transmitter being left on. Shortly after the last time I 
>called them one of the owners died.
>
>Tom
>
>
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