02-20-2006, 10:33 AM
Go and do what Chuck has suggested, which is excellent advice.
There is a remote possibility that you may have a burn (carbon track) on one of the switch wafers. This happened to me on a 37-650 last year. As with your radio, this set initially tried to work, then quit. Eventually, and by sheer luck, I found (via continuity checks which Chuck has suggested that you do, and this is one reason why you need to do this) that a carbon track had formed from B+ to ground on one of the oscillator section switch wafers, and had burned a pit in the phenolic. Using a sharp knife, I scraped out the carbon until I had no continuity between the terminals where the track had formed. I then filled the cut area and the pit with epoxy. Reassembled, end of problem.
Diagnosing and repairing a carbon track is not a job for a novice; it isn't easy for someone who has been doing this for years, either, believe me. Good luck. You may need an Elmer on this job.
There is a remote possibility that you may have a burn (carbon track) on one of the switch wafers. This happened to me on a 37-650 last year. As with your radio, this set initially tried to work, then quit. Eventually, and by sheer luck, I found (via continuity checks which Chuck has suggested that you do, and this is one reason why you need to do this) that a carbon track had formed from B+ to ground on one of the oscillator section switch wafers, and had burned a pit in the phenolic. Using a sharp knife, I scraped out the carbon until I had no continuity between the terminals where the track had formed. I then filled the cut area and the pit with epoxy. Reassembled, end of problem.
Diagnosing and repairing a carbon track is not a job for a novice; it isn't easy for someone who has been doing this for years, either, believe me. Good luck. You may need an Elmer on this job.
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Ron Ramirez
Ferdinand IN
