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Old 9th Jul 2018, 2:49 pm   #31
PJL
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Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 5,997
Default Re: Mystery 1930s 3 valve battery radio chassis

Quote:
Originally Posted by tamemin View Post
although there does seem to be a constant 12-16 khz on the audio out on some channels, I guess maybe that's the nature of the beast?
More than likely this is interference from a nearby switch mode supply. Most of us can't hear 12-16kHz so not a problem!
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