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Philco 20 - variable capacitor tuning
#14

(02-21-2017, 02:54 AM)winston763 Wrote:  Great progress report.

I recoiled the middle coil as you predicted. I did not do anythingl ike the original but i did as many turns as to match the original coil. To me it was sloppy but no overlapping. ANYWAY it works great!!

Thanks for the advice.  I wouldn't be done without it.  On to a model 70 at my next avaiable auction.  I'd like to have the threesome.

"Sound like a bad rf coil. Fortunately the primary (the smaller winding) of these coil is untuned so the number of turns isn't super critical. It most of the time is the outer winding on coil. Original is most likely 38ga magnet wire but any thing from 38 to 30 will work fine. You can approximate the # of turns by the size of the original winding, it's probably 20-50 turns. Unlike the osc coil in the the superhet sets direction doesn't matter."

Thanks again!
Rich

Hey Rich Your welcome!
If you keep fooling with these older Philco set ( pre '35 or so) better have a spool of magnet wire handy.

Glad to help out.

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 20 schematic by Ron? - by winston763 - 02-19-2017, 01:56 AM
RE: Philco 20 - variable capacitor tuning - by Radioroslyn - 02-21-2017, 10:33 AM
RE: Philco Model 20 schematic by Ron? - by sam - 02-20-2017, 12:21 PM



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