09-21-2007, 05:13 PM
1. It was around this time (June 1940 to be exact) that Philco bought controlling interest in the National Union Radio Corporation, a manufacturer of vacuum tubes. Unconfirmed rumors have persisted for years that with the National Union acquisition came a huge stock of standard-base tubes (41, 42, 80, etc.), so Philco started using the standard base tubes again to use up surplus stock. I cannot confirm or deny these rumors.
2. Use a motor run capacitor, as close to 30 uF as you can get and as close to 30 volts as you can get. I have used a Dayton motor run capacitor, obtained from a motor rewinding shop and about the same physical size as the original, in these sets before with excellent results. 120 volt motor run caps are overkill, not to mention too large physically to fit in the chassis.
3. Go with 6K7G. The set's AVC will function better with it than with a 6J7G.
4. Sorry, can't really help you on this question. It seems that every one of the 1939-42 Philco models with thumbwheel controls have band switches that do not "click"; it is as if all of them have lost their ball bearing or whatever provided the detent action.
2. Use a motor run capacitor, as close to 30 uF as you can get and as close to 30 volts as you can get. I have used a Dayton motor run capacitor, obtained from a motor rewinding shop and about the same physical size as the original, in these sets before with excellent results. 120 volt motor run caps are overkill, not to mention too large physically to fit in the chassis.
3. Go with 6K7G. The set's AVC will function better with it than with a 6J7G.
4. Sorry, can't really help you on this question. It seems that every one of the 1939-42 Philco models with thumbwheel controls have band switches that do not "click"; it is as if all of them have lost their ball bearing or whatever provided the detent action.
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Ron Ramirez
Ferdinand IN
