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philco model pt-4
Nathan Slingerland
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#4

05-09-2020, 10:21 AM
Look at the service info for the PT-4:

https://philcoradio.com/library/download...20Book.pdf

36-1533 is the field coil of the electrodynamic speaker (this is before the days where they could cost effectively make strong permanent magnets). The field coil doubled as part of the original filtering design.
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Messages In This Thread
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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