Noise in 680X and 37-690

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Noise in 680X and 37-690

Fred R
Junior Member

Posts: 42
Threads: 4
Joined: Dec 2005
City: Philadelphia, PA

12-28-2005, 09:23 PM

I have restored a 680X, 37-690 and 38-690 a number of years ago. The 38-690 works great especially after reading Ron's notes on the tweeters. Both the 680X and 37-690 have had an annoying static in the audio section, still there with the volume down. It seems to be the driver transformer's primary. The 680X developed a problem and I have to pull the chassis out anyway. This is the version that has the dial under the lid and is the worst design for pulling the chassis as the cabinet has to be laid down to pull it. I am hoping it's something other than the driver transformers. Both sets (the 680X when it was working) seem to quiet down when on for a while. Has anyone who has worked on these sets ever had this problem?

Fred R

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