Hum on AM HF receiver
Al Schapira wrote:
Its MAGNETIC induction from the power transformer into the audio
transformer.
If this is the case, putting a piece of thick sheet steel between the
two transformers will change the noise, for diagnostic purposes. Then
you can try and reorient the transformers to reduce coupling.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
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