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Model 20 Winding data needed
Radioroslyn
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#1

02-24-2011, 09:58 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
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joybird
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#2

03-01-2011, 05:36 PM
I have a parts chassis, I may have the rf and detector coils.

Bob T.
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Radioroslyn
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#3

03-01-2011, 06:57 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
Find
joybird
Silent Key
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Posts: 110
Threads: 26
Joined: Nov 2005
City: Wilmington State, Province, Country: NC
#4

03-02-2011, 09:39 AM
I will check it out and get back to you.
If good, yours for the shipping.

Bob T.
Wilmington, NC
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Ron Ramirez
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City: Ferdinand State, Province, Country: Indiana
#5

03-03-2011, 09:15 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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