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Model 91 cathedral with gain control switch
Mikeym53
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Posts: 11
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City: Beaverton State, Province, Country: Oregon
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07-14-2025, 11:32 AM
I'm working on a model 91 Philco that has a switch incorporated with the on-off switch. You move the knob to a second position. It adds or removes a 160k ohm resistor between the cathode of the 44 RF amp tube and Bakelite block #9. I can't find any schematic that shows this. It looks to be all factory. The resistor is a dog bone that is out of range so I'm changing it. I'm going to put it all back like it is. I am rebuilding all the Bakelite blocks and the Can capacitor. I am replacing all resistors out of range. I guess my only question is. Is it wired correctly and is the resistor the correct value? Thanks all for any help with this. Mike McCrow
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Model 91 cathedral with gain control switch - by Mikeym53 - 07-14-2025, 11:32 AM



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