08-20-2024, 06:06 PM
Hi Brian and welcome,
Here's the service bulletin for the 80 Philco Service Bulletin 140.pdf (philcoradio.com) Would replace 34 & 35 w/10mfd @ 450v. Check the notes @ the bottom as some of the parts have moved or been deleted. Measure the resistances from the 80 filament pin to pin 3 of the 42 (field coil) and from pin 3 to pin 2 on the 42 (opt). That should get you started.
Wouldn't hurt to post a couple of pics of the chassis top and bottom.
de N3GTE
Here's the service bulletin for the 80 Philco Service Bulletin 140.pdf (philcoradio.com) Would replace 34 & 35 w/10mfd @ 450v. Check the notes @ the bottom as some of the parts have moved or been deleted. Measure the resistances from the 80 filament pin to pin 3 of the 42 (field coil) and from pin 3 to pin 2 on the 42 (opt). That should get you started.
Wouldn't hurt to post a couple of pics of the chassis top and bottom.
de N3GTE
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
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
