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Philco Jr.
#12

> For that cap block I used a .01uF Y2 safety cap but as you can see in my first picture the electrolytic cap you are referring to does not exist in my chassis. 

Yes I understand that the later versions of the 80 and all of the 81 & 84's don't use that 10mfd cap. But I suspect that it was a cost cutting measure to replace it w/a matching .015mfd cap. What it does is filter the negative leg of the power supply. That's why 10mfd is much better than .015mfd and now days you get them in a small enough size to fit within the block. The voltage rating is low as it's just has the bias voltage across it may be 16v so a 35v cap would be fine.

> As for the gimmick around the wire from the volume control center tap, how tight do the windings need to be or does it not matter? 

I don't a 80 chassis apart but I do have a 84. It has 2 turns over about 1 3/4". It's there to coupe some more oscillator signal thru to the antenna to improve strong signal mixing. Remember there is no agc/avc to help control the gain any of the stages.

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 Jr. - by Jim Dutridge - 07-22-2024, 02:56 PM
RE: Philco Jr. - by Jim Dutridge - 07-22-2024, 06:00 PM
RE: Philco Jr. - by Ed Locker - 07-23-2024, 10:16 AM
RE: Philco Jr. - by Jim Dutridge - 07-23-2024, 11:51 AM
RE: Philco Jr. - by Jim Dutridge - 07-23-2024, 12:35 PM
RE: Philco Jr. - by Radioroslyn - 07-23-2024, 05:59 PM
RE: Philco Jr. - by Jim Dutridge - 07-23-2024, 07:33 PM
RE: Philco Jr. - by David - 07-23-2024, 08:35 PM
RE: Philco Jr. - by David - 07-23-2024, 08:40 PM
RE: Philco Jr. - by Radioroslyn - 07-23-2024, 09:44 PM
RE: Philco Jr. - by Jim Dutridge - 07-28-2024, 12:10 PM
RE: Philco Jr. - by Radioroslyn - 07-28-2024, 04:34 PM
RE: Philco Jr. - by Jim Dutridge - 07-29-2024, 08:55 AM
RE: Philco Jr. - by Radioroslyn - 07-29-2024, 04:14 PM
RE: Philco Jr. - by Jim Dutridge - 07-29-2024, 04:38 PM
RE: Philco Jr. - by Jim Dutridge - 07-31-2024, 04:21 PM
RE: Philco Jr. - by David - 07-31-2024, 07:59 PM
RE: Philco Jr. - by Radioroslyn - 07-31-2024, 10:00 PM
RE: Philco Jr. - by Jim Dutridge - 08-02-2024, 04:08 PM
RE: Philco Jr. - by Jim Dutridge - 08-09-2024, 02:53 PM
RE: Philco Jr. - by RodB - 08-09-2024, 08:39 PM



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