Philco 84 ("38-1139") - Printable Version

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Philco 84 ("38-1139") - w4rtc - 10-27-2006

Philco 84 (the radio is a model 84)
O K chuck if you are there, you were correct, the osc coil is open several places. There is 15 turns on the cathode winding and only 5 were in one piece.

Did you ever rewind one of those coils?? The wire is very fine and it is cotton covered. Would I have to use cotton covered wire??? I have never rewound a coil with wire so fine. Where would I get the wire??? ETC

Any help would would be appreciated

Joe

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- Chuck Schwark - 10-28-2006

I have not, but Ron (this Philco site owner) does coil re-winding. See here: http://philcoradio.com/rre/

Not difficult, but you need to have the exact number of turns and the same gauge wire as the original.

Also see this Service Tip from my website: http://www.philcorepairbench.com/tips/svctip36.htm

Enameled magnet wire is available many places. See the Resource Links on my site, but Radio Daze is a good place.

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- Terry Burns - 10-28-2006

Hi Joe,
If you do decide to rewind your coil you can use a micrometer to measure the gauge and order the appropriate wire. You can find wire gauge specifcations on the internet. Just make sure you make a note which way the wire is wound on the form. An oscillator coil needs to be in phase with the incoming signal. It's not that hard to do really. Just a little tedious.

Hope this helps
Terry

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- Bill Hutchinson - 11-01-2006

It's quite possible you can get the coil going again by unwinding the coil back to the open point and repairing it. Hopefully it's not too far in.

Clean the wire ends and resolder them. Try using some fingernail polish over the connection to insulate it, then after it dries, re-wrap the wire around the coil. It might be a quick 'n simple fix, and would be worth a try before rewinding the whole thing.

Good luck, and keep us posted.

Bill

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