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Philco Model 91
#31

I need a little clarification. Are we talking about #2 on the diagram? It should have 5 connections. The coil on the top is  the primary and has the 10,000 ohm resistor in parallel with it. One end is grounded the other the ant. The larger part of the coil is the secondary which consists of the 2 end connections and a tap. 5 total for the coil, I have no idea about pin numbers as they are not noted on the diagram.

Top of the winding goes to the stator of the tuning capacitor. Tap connects to grid cap of the 39/44. Bottom of the winding goes to bakelite block #6 .05 and #3 2 Megohm resistor.

The .05mf cap provides a rf ground for the coil (not a dc ground). Without this the secondary has no "ground" return. The 2 Meg resistor supplies the avc voltage thru coil to the control grid of the rf amplifier tube.

If your saying that the primary is bad that is simple enough to rewind. Remove old wire and rewind with 25' of 40G magnet wire.

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry


Messages In This Thread
Philco Model 91 - by texan george - 06-17-2022, 08:05 PM
RE: Philco Model 91 - by texan george - 06-17-2022, 08:18 PM
RE: Philco Model 91 - by texan george - 06-18-2022, 04:58 PM
RE: Philco Model 91 - by Radioroslyn - 06-18-2022, 08:04 PM
RE: Philco Model 91 - by texan george - 06-19-2022, 08:38 PM
RE: Philco Model 91 - by Radioroslyn - 06-20-2022, 09:49 PM
RE: Philco Model 91 - by texan george - 06-22-2022, 10:46 AM
RE: Philco Model 91 - by Radioroslyn - 06-22-2022, 02:11 PM
RE: Philco Model 91 - by texan george - 06-23-2022, 03:07 PM
RE: Philco Model 91 - by Radioroslyn - 06-23-2022, 06:31 PM
RE: Philco Model 91 - by texan george - 06-24-2022, 10:37 AM
RE: Philco Model 91 - by Radioroslyn - 06-24-2022, 01:48 PM
RE: Philco Model 91 - by texan george - 06-24-2022, 09:20 PM
RE: Philco Model 91 - by texan george - 06-26-2022, 04:01 PM
RE: Philco Model 91 - by Radioroslyn - 06-26-2022, 09:53 PM
RE: Philco Model 91 - by texan george - 06-27-2022, 03:57 PM
RE: Philco Model 91 - by Radioroslyn - 06-28-2022, 01:56 PM
RE: Philco Model 91 - by texan george - 06-28-2022, 03:47 PM
RE: Philco Model 91 - by texan george - 06-29-2022, 01:12 PM
RE: Philco Model 91 - by Chas - 06-29-2022, 01:58 PM
RE: Philco Model 91 - by texan george - 06-29-2022, 09:07 PM
RE: Philco Model 91 - by Radioroslyn - 06-30-2022, 01:45 PM
RE: Philco Model 91 - by texan george - 07-01-2022, 03:51 PM
RE: Philco Model 91 - by texan george - 07-12-2022, 02:04 PM
RE: Philco Model 91 - by Radioroslyn - 07-12-2022, 05:40 PM
RE: Philco Model 91 - by texan george - 07-12-2022, 08:18 PM
RE: Philco Model 91 - by texan george - 07-12-2022, 08:26 PM
RE: Philco Model 91 - by Radioroslyn - 07-12-2022, 08:52 PM
RE: Philco Model 91 - by texan george - 07-13-2022, 02:56 PM
RE: Philco Model 91 - by texan george - 07-14-2022, 09:19 PM
RE: Philco Model 91 - by Radioroslyn - 07-15-2022, 09:52 AM
RE: Philco Model 91 - by texan george - 07-16-2022, 08:31 AM
RE: Philco Model 91 - by texan george - 07-17-2022, 08:16 PM
RE: Philco Model 91 - by Ron Ramirez - 07-17-2022, 10:30 PM
RE: Philco Model 91 - by MrFixr55 - 07-17-2022, 10:31 PM
RE: Philco Model 91 - by MrFixr55 - 07-17-2022, 10:44 PM
RE: Philco Model 91 - by Ron Ramirez - 07-17-2022, 10:47 PM
RE: Philco Model 91 - by texan george - 07-18-2022, 04:52 PM
RE: Philco Model 91 - by MrFixr55 - 07-18-2022, 11:08 PM
RE: Philco Model 91 - by texan george - 07-19-2022, 03:41 PM
RE: Philco Model 91 - by texan george - 07-25-2022, 01:47 PM
RE: Philco Model 91 - by texan george - 08-10-2022, 03:28 PM
RE: Philco Model 91 - by RodB - 08-10-2022, 05:10 PM
RE: Philco Model 91 - by Radioroslyn - 08-10-2022, 06:48 PM
RE: Philco Model 91 - by texan george - 08-11-2022, 07:31 AM
RE: Philco Model 91 - by RodB - 08-11-2022, 09:24 AM
RE: Philco Model 91 - by texan george - 08-18-2022, 02:14 PM
RE: Philco Model 91 - by texan george - 09-07-2022, 03:21 PM
RE: Philco Model 91 - by Paul Philco322 - 09-07-2022, 07:26 PM
RE: Philco Model 91 - by texan george - 09-09-2022, 07:44 AM



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