Philco 39-30 restoration

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Philco 39-30 restoration

Ron Ramirez
Silent Key

Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana

#14

02-08-2012, 06:42 PM

Bob

I just looked, and I do not find any production change mentioned such as you described.

Looking at the schematic, the brown wire of the 1st IF transformer was originally connected to a 2 meg. resistor (28), and a .05 uF capacitor (3). The other end of (28) connects to resistor (29), 1 meg., and to the plate of the 37 tube which is used as a dual-diode detector (the grid being used as the other "plate" with a 110 pF cap (19) between plate and grid). The other end of (29) goes to B-, and to the suppressor grid of the IF amplifier tube, a type 78.

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Ron Ramirez
Ferdinand IN

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Messages In This Thread

Philco 39-30 restoration - by Bob Andersen - 02-05-2012, 01:39 AM

RE: Philco 39-30 restoration - by Bob Andersen - 02-27-2012, 02:20 AM

RE: Philco 39-30 restoration - by Bob Andersen - 02-28-2012, 12:22 AM

RE: Philco 39-30 restoration - by Ron Ramirez - 02-28-2012, 06:50 AM

RE: Philco 39-30 restoration - by Bob Andersen - 02-28-2012, 06:11 PM

RE: Philco 39-30 restoration - by Arran - 02-29-2012, 02:30 AM

RE: Philco 39-30 restoration - by Bob Andersen - 03-02-2012, 09:59 PM

RE: Philco 39-30 restoration - by Bob Andersen - 03-02-2012, 03:55 PM

RE: Philco 39-30 restoration - by Bob Andersen - 03-02-2012, 06:08 PM

RE: Philco 39-30 restoration - by Arran - 03-03-2012, 12:23 AM

RE: Philco 39-30 restoration - by Bob Andersen - 03-04-2012, 02:26 AM

RE: Philco 39-30 restoration - by Arran - 03-04-2012, 03:04 AM

RE: Philco 39-30 restoration - by Bob Andersen - 03-04-2012, 03:47 AM

RE: Philco 39-30 restoration - by Ron Ramirez - 03-04-2012, 08:28 AM

RE: Philco 39-30 restoration - by Bob Andersen - 03-04-2012, 04:11 PM

RE: Philco 39-30 restoration - by Bob Andersen - 03-04-2012, 10:13 PM

RE: Philco 39-30 restoration - by Bob Andersen - 03-05-2012, 11:47 PM

RE: Philco 39-30 restoration - by Arran - 03-06-2012, 12:53 AM

RE: Philco 39-30 restoration - by Bob Andersen - 03-06-2012, 01:40 AM

RE: Philco 39-30 restoration - by Arran - 03-06-2012, 03:45 AM

RE: Philco 39-30 restoration - by Bob Andersen - 03-06-2012, 05:30 AM

RE: Philco 39-30 restoration - by Arran - 03-06-2012, 09:09 PM

RE: Philco 39-30 restoration - by Bob Andersen - 03-07-2012, 12:42 AM

RE: Philco 39-30 restoration - by Bob Andersen - 03-13-2012, 08:17 PM

RE: Philco 39-30 restoration - by Arran - 03-13-2012, 11:08 PM

RE: Philco 39-30 restoration - by Bob Andersen - 03-16-2012, 11:45 PM

RE: Philco 39-30 restoration - by Bob Andersen - 03-30-2012, 10:05 PM

RE: Philco 39-30 restoration - by Ron Ramirez - 03-30-2012, 10:08 PM

RE: Philco 39-30 restoration - by Arran - 03-30-2012, 10:50 PM

RE: Philco 39-30 restoration - by Bob Andersen - 04-06-2012, 06:11 PM

RE: Philco 39-30 restoration - by Ron Ramirez - 04-06-2012, 09:22 PM

RE: Philco 39-30 restoration - by Bob Andersen - 04-07-2012, 12:44 AM

Re: Philco 39-30 restoration - by Arran - 02-05-2012, 02:21 AM

Re: Philco 39-30 restoration - by Bob Andersen - 02-05-2012, 03:09 AM

Re: Philco 39-30 restoration - by Arran - 02-05-2012, 03:20 AM

Re: Philco 39-30 restoration - by Ron Ramirez - 02-05-2012, 09:01 AM

Re: Philco 39-30 restoration - by Bob Andersen - 02-05-2012, 04:31 PM

Re: Philco 39-30 restoration - by Ron Ramirez - 02-05-2012, 06:09 PM

Re: Philco 39-30 restoration - by codefox1 - 02-05-2012, 06:12 PM

Re: Philco 39-30 restoration - by Bob Andersen - 02-05-2012, 06:36 PM

Re: Philco 39-30 restoration - by Arran - 02-05-2012, 10:40 PM

Re: Philco 39-30 restoration - by Bob Andersen - 02-08-2012, 12:18 AM

Re: Philco 39-30 restoration - by codefox1 - 02-08-2012, 11:06 AM

Re: Philco 39-30 restoration - by Bob Andersen - 02-08-2012, 06:15 PM

Re: Philco 39-30 restoration - by Ron Ramirez - 02-08-2012, 06:42 PM

Re: Philco 39-30 restoration - by Bob Andersen - 02-08-2012, 06:50 PM

Re: Philco 39-30 restoration - by Ron Ramirez - 02-08-2012, 09:11 PM

Re: Philco 39-30 restoration - by RGallahue - 02-08-2012, 09:27 PM

Re: Philco 39-30 restoration - by Bob Andersen - 02-08-2012, 11:18 PM

Re: Philco 39-30 restoration - by Bob Andersen - 02-10-2012, 01:03 AM

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