philco model pt-4

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philco model pt-4

Nathan Slingerland
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Posts: 1,874
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Joined: May 2015
City: Seattle State, Province, Country: WA

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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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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