Philco 91 Schematic

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Philco 91 Schematic

RodB
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Posts: 1,075
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City: Roseville, MN

9 hours ago

Hi Dan,

I can't explain this specific resistor but I have seen the use of a switch to apply B+ voltage to screen grids of rf tubes to give a boost in gain to pull in distant stations. The switch was called a range or local/distance switch. Does the resistor connect to the ground terminal of block 9? It may be there to reference the grids to ground when the B+ is switched off. That would make the tubes run as triodes.

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Philco 91 Schematic - by dconant - 10-12-2024, 06:45 PM

RE: Philco 91 Schematic - by RodB - 10-13-2024, 09:10 AM

RE: Philco 91 Schematic - by dconant - 10-13-2024, 09:48 AM

RE: Philco 91 Schematic - by dconant - Yesterday, 07:12 PM

RE: Philco 91 Schematic - by RodB - 9 hours ago

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