Posts: 10
Threads: 1
Joined: Aug 2013
City: Dowagiac, Mi.
I just measured my original Philco 4990 mica caps, they are both marked with yel.-gn. dots and they are approx. 35pf in value. Also part #17 does not connect directly to gd. but to pin #4 of the #24 tube exactly where part #22, the other 35pf cap connects. If you look on the Philco mica caps parts list, #4990 is listed as a 35pf cap. with yellow and green dots. I really can't tell if the small choke was factory or not.
Good luck with your project- I can confirm that both sch. available are filled with errors and I really had my doubts when I fired mine up- but it works good.
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Philco model 38 code 121 not receiving signal.
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