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RF Coil for Model 20 or 20A
Radioroslyn
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#4

05-29-2018, 11:11 PM
Very common issue on the early sets. Pretty simple to fix. Primary winding is on the outside so it's easy to remove and rewind w/new wire. Wire gauge isn't particularly crucial something like 32-40ga is fine. It's not a tuned circuit so the # of turns isn't critical abt 50 is good. The phasing (direction) dosen't matter.
I suppose you could cheat and use a resistor and cap to supply the hv to the 24A plate and a cap to couple the rf signal the secondary of the coil.

GL
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
(This post was last modified: 05-29-2018, 11:14 PM by Radioroslyn.)
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Messages In This Thread
RF Coil for Model 20 or 20A - by hrensin - 05-29-2018, 10:07 PM
RE: Inter-stage transformer for Model 20 or 20A - by Radioroslyn - 05-29-2018, 11:11 PM
RE: RF Coil for Model 20 or 20A - by morzh - 05-30-2018, 08:59 AM
RE: RF Coil for Model 20 or 20A - by KCMike - 05-30-2018, 11:23 AM
RE: RF Coil for Model 20 or 20A - by hrensin - 05-30-2018, 02:54 PM
RE: RF Coil for Model 20 or 20A - by morzh - 05-30-2018, 04:43 PM
RE: RF Coil for Model 20 or 20A - by hrensin - 05-30-2018, 04:59 PM



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  1. The PHILCO Phorum
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