09-03-2015, 07:48 PM
I gave it a try last night. Cleaned out all of the tube sockets and each tube pin. I took the 7C6 from the 41-285 and swapped it with the one in the 41-280. And...partial success. The hum isn't gone entirely, but it is much less noticeable.
I found a crack in the speaker cone I had not noticed before, so I patched it. With my finger on the crack gently, the distortion seems to be less noticeable, too, so maybe I'm on the way. I should have the cabinet re-veneered by next week, so I'd like for the chassis to be ready to go by then.
Maybe I'll get a new 7C6 and take it outside to try. My house is an electronically noisy house. ALL of my radios have noisy tuning above 1100. An all electric community.
I found a crack in the speaker cone I had not noticed before, so I patched it. With my finger on the crack gently, the distortion seems to be less noticeable, too, so maybe I'm on the way. I should have the cabinet re-veneered by next week, so I'd like for the chassis to be ready to go by then.
Maybe I'll get a new 7C6 and take it outside to try. My house is an electronically noisy house. ALL of my radios have noisy tuning above 1100. An all electric community.
Charlie in San Antonio
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