Thread: FRG-7 Quiet hum
View Single Post
Old 20th Jul 2019, 4:03 pm   #5
g4aaw pete
Heptode
 
g4aaw pete's Avatar
 
Join Date: Jan 2008
Location: Birchington Kent, UK.
Posts: 595
Default Re: FRG-7 Quiet hum

Had this problem with two Kenwood R5000 receivers.
The cause was poor eathing on the IF / audio output pwb.
Resolution was by applying Deoxit to the earth return / mounting tabs.
__________________
Regards
Pete
g4aaw pete is offline