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Just an update after 4 1/2 years of regular use. Only problem in the last 4 1/2 years was the KRK2 fine tuning shaft. I made a new one out of brass riveted to the original fine tuning disc.
Still using all of the original chassis mount electrolytics. 78 years and still fine. The restoration entailed only replacing the wax caps that needed replacing eg subject to a a large DC across them. A three resistors had drifted affecting operation. Tested transconductance on all tubes and replace a few with original period NOS RCA tubes.
The main point is the originality of the electrolytics. They survived because the set was not plugged in after the set sat unpowered for over 50 years. Slowly reformed the capacitor dielectrics and they are all still fine. One axial lead electrolytic was bad and was replaced.
Here are a couple of snapshots off air made this afternoon. Can you name the film?
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01-26-2025, 03:08 PM
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