Philco 90 (Early) Speaker Diagram - Printable Version
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Philco 90 (Early) Speaker Diagram -
Nathan Slingerland - 11-08-2015
For reference, attached is the wiring diagram for the early Philco 90 with push-pull 45 output tubes:
The page in the tech section on Philco 20/70/90 speakers is very helpful but only has the diagram for the single-ended output versions:
http://www.philcoradio.com/tech/speaker.htm
The wiring on my 90 was pretty mangled, so it took a bit of tracing of the schematic to figure it out.