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New Philco 20 Filter Caps...In, but Another Question??
Joe
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Posts: 31
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Joined: Feb 2012
#5

01-13-2013, 06:31 PM
Hello All

Did some extensive checks & found/did the lollowing....

Replaced all resistors out of tolorence. Ordered caps so I can recap radio. While waiting for caps, checked all voltages. Found the following...

All power xformer voltages between the taps are good.
24A 1st & 2nd rf....
2.1v pins 1&5 filament plate 325vdc pin2 114vdc grid pin 3
0vdc grid cap 8.6vdc cathode pin 4

24a detector....
2.1v pins 1&5 filament plate 0vdc 6.6vdc grid pin 3
0vdc grid cap, 1.1vdc cathode pin 4

27....
2.1v pins 1&5 filament plate 150vdc pin 2 -0.6vdc grid pin 3
0vdc cathode pin 4

71s....
4.8v pins 1&4 filament plate 325vdc pin 2 -8vdc grid pin 3

80...
700vac between pins 2&3 5v pins 1&4 filament

Just a novice, but isn't the plate voltage on the detector tube 24a supposed to be around 35vdc. Can someone narrow down the problem for me? THANKS!!! Joe
(This post was last modified: 01-13-2013, 06:33 PM by Joe.)
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Messages In This Thread
RE: Philco 20 Dead - by Elijah - 01-02-2013, 10:14 PM
RE: Philco 20 Dead - by TA Forbes - 01-02-2013, 10:28 PM
RE: Philco 20 Dead - by Joe - 01-02-2013, 11:41 PM
Philco 20 Voltages?? - by Joe - 01-13-2013, 06:31 PM
RE: Philco 20 Voltages - by Ron Ramirez - 01-13-2013, 07:19 PM
RE: Philco 20 Voltages - by Joe - 01-13-2013, 07:37 PM
RE: Philco 20 Voltages - by Ron Ramirez - 01-13-2013, 08:07 PM
RE: Philco 20 Voltages - by Joe - 01-13-2013, 08:17 PM
RE: Philco 20 Voltages - by Ron Ramirez - 01-13-2013, 08:23 PM
RE: Philco 20 Voltages - by Joe - 01-13-2013, 08:31 PM
RE: Philco 20 Voltages - by Ron Ramirez - 01-14-2013, 06:35 AM
RE: Philco 20 Voltages - by Joe - 01-16-2013, 03:00 PM
RE: Philco 20 Voltages - by codefox1 - 01-16-2013, 07:05 PM
RE: Philco 20 Voltages - by Joe - 01-16-2013, 09:00 PM
RE: Philco 20 Voltages - by TA Forbes - 01-16-2013, 09:59 PM
RE: Philco 20 Voltages - by Joe - 01-16-2013, 10:47 PM
RE: Philco 20 Voltages - by TA Forbes - 01-16-2013, 11:27 PM
RE: Philco 20 Voltages - by Joe - 01-17-2013, 12:10 AM
RE: Philco 20 Voltages - by 7estatdef - 01-17-2013, 06:16 PM
RE: Philco 20 Voltages - by Joe - 01-18-2013, 12:46 PM
RE: Philco 20 Filter Caps?? - by codefox1 - 01-18-2013, 09:02 PM
RE: Philco 20 Filter Caps?? - by Ron Ramirez - 01-18-2013, 09:38 PM
RE: Philco 20 Filter Caps?? - by Joe - 01-19-2013, 12:28 AM



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