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Old 29th Nov 2022, 9:57 pm   #3
PYE 405
Pentode
 
Join Date: Dec 2009
Location: Chatteris, Cambridgeshire, UK.
Posts: 176
Default Re: Cossor 524 rustling noise on FM

One possibility worth bearing in mind is HT tracking on the selector switch. If audio and HT switching occur on the same wafer section, this can sometimes happen. It is worth digging out the circuit and having a close look at the switch sections to see. The HT will vary slightly to the front end according to signal strength, but whether this is enough to alter the level of rustling other than a fault elsewhere, is open to question.
It might also be worth switching the set to "Gram" and turning up the volume to be certain the rustling is only on the FM position.
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