04-16-2012, 01:18 PM
(04-16-2012, 12:42 PM)morzh Wrote: The mica cap is on the last 24's plate (detector). A 250pF.
Be sure ALL resistors in the set are within a 20% tolerance of their nominal values. I'll bet you have a grid bias problem on the 71A's or insufficient plate or screen voltage(s) somewhere. Carbon comp resistors usually go way up in value with age. Also check the BC resistor sections for correct values.
Chuck
Chuck Schwark,
The Philco Repair Bench
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