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Model 20 Winding data needed
02-24-2011, 08:58 PM
Anybody got data for the rf and detector coils? Has any rewound the speaker field coil? Size wire?
Tnx! Terry 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
03-01-2011, 04:36 PM
I have a parts chassis, I may have the rf and detector coils.
Bob T.
03-01-2011, 05:57 PM
Tnx for offer! I ended up counting the turns myself. Seems that just the primaries where open and it's a fairly small winding about 50 turns. All coils now are ok. Have yet to rebuild the filter bank and then I can take her for a spin! Will keep you in mind if I need any bits or pieces. Come to think of it do you have a good driver transformer? The one on my model 21 has an open primary.
Terry 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
03-02-2011, 08:39 AM
I will check it out and get back to you.
If good, yours for the shipping. Bob T. Wilmington, NC 
03-03-2011, 08:15 AM
I've never tried to rewind a field coil.
If you have a Harbor Freight store near you, I would suggest you buy a micrometer from them. Then you can determine the size of the wire by measuring the original, and using a wire table which can be found in many old radio/electronics textbooks (and probably online as well), and convert the diameter to the proper wire gauge. I picked one up a couple years ago to assist me in rewinding coils. Oh, I looked in my notebook where I keep my notes on various Philco coils, and I don't have any data on the 20 coils so it appears I've never rewound any. -- Ron Ramirez Ferdinand IN
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