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Old 3rd Dec 2017, 2:03 pm   #8
Ambientnoise
Heptode
 
Join Date: Feb 2006
Location: Marlborough, Wiltshire, UK.
Posts: 915
Default Re: Very odd fault with Dynatron Radiogram

More random thoughts ! Wonder if it could be a microphonic capacitor in the disc channel ? unlikely if both channels are affected, I know but perhaps possible if due to dielectric deterioration. Is the main voltage rail different in the two locations, due to mains variations ? Are speakers different inpedance so poor decoupling is becoming apparent ?
Good luck.

Ken
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