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Philco 90 schematic needed
Radioroslyn
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#4

08-29-2016, 11:03 PM
(08-29-2016, 09:55 AM)Chuck Braun Wrote:  Hi Ron and all,

    I can't seem to find the schematics that were on the original philcoradio site, and I need one for my model 90, with the single 47 output tube. Could someone direct me to the location on the Phorum where I can find the schematic? They are the best I've seen. I need to know the values of the bleeder resistor 58, as well as the DC resistance of the field and output transformer primary, since my speaker's transformer and field are both open (along with the broken cone). Could someone please point me to the steps I need to obtain the schematic for the 90? Thanks so much, all...

Hi Chuck,
Welcome
You may want to keep your eyes peeled for the model 70 spkr. It will replace the 90 spkr or a model 20 spkr will work also but the transformer is for push/pull output so you'll need to swap it for a 7K unit.

Terry
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
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Messages In This Thread
Philco 90 schematic needed - by Chuck Braun - 08-29-2016, 09:55 AM
RE: Philco 90 schematic needed - by KCMike - 08-29-2016, 11:15 AM
RE: Philco 90 schematic needed - by klondike98 - 08-29-2016, 12:41 PM
RE: Philco 90 schematic needed - by Radioroslyn - 08-29-2016, 11:03 PM
RE: Philco 90 schematic needed - by Chuck Braun - 09-21-2016, 08:29 AM



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  1. The PHILCO Phorum
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