Thread: FRG-7 Quiet hum
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Old 20th Jul 2019, 5:36 pm   #6
Jon_G4MDC's Avatar
Join Date: Nov 2015
Location: Welwyn Garden City, Hertfordshire, UK.
Posts: 967
Default Re: FRG-7 Quiet hum

It might also be worth following the low level AF wiring.

It will almost certainly be in screened cable but it wouldn't be a first time to see it routed half a turn around the mains transformer with only small spacing.

Pye managed it in one transmitter.
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