philco model pt-4

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philco model pt-4

Radioroslyn
Phorum Expert

Posts: 7,285
Threads: 268
Joined: Dec 2009
City: Roslyn Pa

05-09-2020, 11:04 AM

A couple of thoughts. If your field coil is open you can do as I mentioned. The pole inside the spkr as some residual magnetism and it may work. How well it will work I'm not sure. I have heard of sticking a small rare earth (powerful) behind the fc at the back of the spkr to increase the magnetism.
The other option is the replace the spkr with a permanent magnet one. I think that this set uses a 4"x6" oval. These are not all at common. And the other trick is to be able to mount the output transformer on it's back. I'm not saying it's impossible but will take a little hunting to find a proper candidate.
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: 05-09-2020, 11:09 AM by Radioroslyn.)

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philco model pt-4 - by tonto007 - 05-08-2020, 10:18 PM

RE: philco model pt-4 - by Radioroslyn - 05-09-2020, 04:41 AM

RE: philco model pt-4 - by tonto007 - 05-09-2020, 09:43 AM

RE: philco model pt-4 - by Nathan Slingerland - 05-09-2020, 10:21 AM

RE: philco model pt-4 - by Radioroslyn - 05-09-2020, 11:04 AM

RE: philco model pt-4 - by tonto007 - 05-09-2020, 11:30 AM

RE: philco model pt-4 - by Radioroslyn - 05-09-2020, 11:37 AM

RE: philco model pt-4 - by tonto007 - 05-09-2020, 11:47 AM

RE: philco model pt-4 - by Radioroslyn - 05-09-2020, 11:54 AM

RE: philco model pt-4 - by Radioroslyn - 05-09-2020, 12:08 PM

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