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Philco 39-25 -- No reception
#1

Hello everyone
I am currently performing an electronic restoration of a Philco 39-25.
The radio powers on (everything seems normal but there is no reception. I have rechecked the wiring against the schematic which I traced out with a highlighter while comparing to the actual wiring. I thought it might be a oscillator coil problem but also rechecked for continuity which was also fine. Did the same with the broadcast and shortwave coils as well. I connected an outside antenna to see if that would help but there is no change. I also have touched the top of the caps on 6A8G, 78, and 75 to see if I could hear any hum . Nothing.

Any help will be appreciated
I have attached a link to the schematic
http://www.nostalgiaair.org/pagesbymodel...013286.pdf

I have listed the pin voltage readings that I got to help:

6A8-
PIN 1 = NO CONNECTION
PIN 2 = 6.67
PIN 3 = 114
PIN 4 = 12
PIN 6 = 12
PIN 7= 0
PIN 8 = 0

78-
PIN 1= 6.6
PIN 2= 189
PIN 3= 4.5
PIN 4= NEG 3
PIN 5= 0
PIN 6= 0


75

PIN 1 = 0
PIN 2 =211
PIN 3 = NEG 2.47
PIN 4 = 0
PIN 5 = 0
PIN 6 = 6.5


41

PIN 1 = 6.5
PIN 2 = 202
PIN 3 = 208
PIN 4 = NEG 13
PIN 5 = 0
PIN 6 = 0

84

PIN 1 = 6.5
PIN 2 = 292
PIN 3 = 292
PIN 4 = 300
PIN 5 = 0

ELECTROLYTIC (C17 ) = 191
ELECTROLYTIC (C18 ) = 208
ELECTROLYTIC (C41 ) = 302

I have noticed that I can get static when touching pin 4 of the 41 tube.

Kirk


Messages In This Thread
Philco 39-25 -- No reception - by KRMiskimon - 03-02-2016, 08:27 PM
RE: Philco 39-25 -- No reception - by Warren - 03-02-2016, 11:31 PM
RE: Philco 39-25 -- No reception - by KRMiskimon - 03-02-2016, 11:35 PM
RE: Philco 39-25 -- No reception - by morzh - 03-02-2016, 11:56 PM
RE: Philco 39-25 -- No reception - by KRMiskimon - 03-03-2016, 12:43 AM
RE: Philco 39-25 -- No reception - by KRMiskimon - 03-03-2016, 12:47 AM
RE: Philco 39-25 -- No reception - by Radioroslyn - 03-03-2016, 01:35 AM
RE: Philco 39-25 -- No reception - by TV MAN - 03-03-2016, 10:57 AM
RE: Philco 39-25 -- No reception - by Steve Davis - 03-03-2016, 11:40 AM
RE: Philco 39-25 -- No reception - by klondike98 - 03-03-2016, 12:43 PM
RE: Philco 39-25 -- No reception - by KRMiskimon - 03-03-2016, 09:40 PM
RE: Philco 39-25 -- No reception - by Radioroslyn - 03-03-2016, 11:42 PM
RE: Philco 39-25 -- No reception - by KRMiskimon - 03-05-2016, 06:55 PM
RE: Philco 39-25 -- No reception - by Radioroslyn - 03-05-2016, 07:50 PM



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