06-27-2016, 04:28 PM
<Easy right?
Not so much else you would have found it.
Perhaps another way to troubleshoot may help. I'd use a piece of small gauge insulated solid wire and wrap it around the grid pin of the 27. reinstall the tube and use that to monitor the signal level while the set is in the cabinet.
As an aside I can tell you that the things I've found on model 20's that have been problematic are rf coils, audio driver transformer, and output transformer.
Something else to look for is bad connections. The 660 I'm working on has a bad connection at the ant fastenstock clip though rivet and wire that goes the ant coil. Same issues volume would go up and down at will. Also check connection to chassis ground
Happy hunting
Terry
Not so much else you would have found it.
Perhaps another way to troubleshoot may help. I'd use a piece of small gauge insulated solid wire and wrap it around the grid pin of the 27. reinstall the tube and use that to monitor the signal level while the set is in the cabinet.
As an aside I can tell you that the things I've found on model 20's that have been problematic are rf coils, audio driver transformer, and output transformer.
Something else to look for is bad connections. The 660 I'm working on has a bad connection at the ant fastenstock clip though rivet and wire that goes the ant coil. Same issues volume would go up and down at will. Also check connection to chassis ground
Happy hunting
Terry
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