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Philco Model 20 distortion
morzh
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#5

04-16-2012, 04:19 PM
The output stage (71As) relies on the big wire-wound resistor for its biases.


The sections are 1-2 and 2-3 (1.4 KOhm and 187 Ohm respectively). Rarely changes value, but does burn.
In my 20 the 1-2 section (1.4K) was burned out. I put a 10 Watt resistor in there.
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Messages In This Thread
Philco Model 20 distortion - by 93foxconvert - 04-15-2012, 11:34 PM
RE: Philco Model 20 distortion - by 7estatdef - 04-16-2012, 09:17 AM
RE: Philco Model 20 distortion - by morzh - 04-16-2012, 01:42 PM
RE: Philco Model 20 distortion - by Chuck Schwark - 04-16-2012, 02:18 PM
RE: Philco Model 20 distortion - by morzh - 04-16-2012, 04:19 PM
RE: Philco Model 20 distortion - by 93foxconvert - 05-06-2012, 01:21 PM



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  1. The PHILCO Phorum
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