Philco 42-390, code 121 speaker - Printable Version

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+--- Thread: Philco 42-390, code 121 speaker (/showthread.php?tid=25395)

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Philco 42-390, code 121 speaker - Stevelog - 11-20-2024

I recently became the owner of a Philco console 42-390, saving it from the dumpster.  It is missing the speaker. It uses a dual 41 push-pull amplifier for its output. I believe it had an 8" speaker.  I have not been able to locate locate an original speaker and transformer(36-1552-4; 32-8120), so I probably will have to install a PM speaker in its place.  Does anyone know what the measurements in ohms is for the field coil and voice coil?  I have a coil winder and have had good results winding new voice coils and field coils for for my Crosleys. Also, it would be of help to know what output transformer should I use as a replacement? 
Any help or advice is appreciated.

Thanks, Steve

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RE: Philco 42-390, code 121 speaker - GarySP - 11-20-2024

Welcome to the Phorum, Steve! The Philco Radio Library located at the bottom of the page has info on speakers and output transformers under the parts section. Perhaps this will help. Take care and BE HEALTHY! Gary

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RE: Philco 42-390, code 121 speaker - Stevelog - 11-20-2024

Thanks for that information. It would appear from the output transformer parts list that the transformer that was originally on the speaker is #32-7968. Year would be 1939. Goes with a push-pull output using two 41 (6k6GT) tubes. A closer examination of the very small print schematic indicates that the speaker is a PM type. The ratio specs for the transformer is 16,000 and 1.25. I assume that this is for the primary and secondary windings. Does this seem reasonable?

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