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76.174.68.112
Thanks!
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Looks like its a G2 supply, with a drop down resistor from the main B+ and a cap on G2 to ground. If so, be advised, this is a very cheap, sub optimal way to run G2 if you seek quality.
G2 needs its own totally separate B+ supply...you oughta listen to THAT !!!
Jeff Medwin
This is a voltage divider network that sets g2 voltage as a fraction of B+.
The confusion stems out of parallel resistors used to get a value and the totally unnecessary upper cap between g2 and B+.
The resistors act as voltage dividers, and while the solution is sub-optimal, it should set a relatively stable voltage for g2.
The lower cap is needed to provide a direct AC path for g2, separating it from the anode. It also acts as high pass element in the RC filtering network created in interaction with the dividing resistors and the tube itself.
The superfluous cap might introduce some AC noise (for instance ripple) to g2 for possible cancellation purposes). But the effect is more difficult to calculate than the case where AC noise is introduced via g1...
Last but not least, this is hardly a (correctly drawn) legacy amp.
******
http://rh-amps.blogspot.com/
nada aqui
--------------------------
Buy Chinese. Bury freedom.
Edits: 11/25/14
The schematic is hard to read but I think they are part of the G2 supply.
Tre'
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