• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

7189 PP amplifier

I need some help understanding this circuit. My issues are with how the 5879 is set up.

1. The plate supply resistor is 180K while the suppressor is 120K, so won't that mean the Plate voltage is lower than the suppressor voltage?

2. There are no AC bypass caps on the 6CG7 grids. So won't there be plate voltage here?

3. How is phase inverted on the 6CG7 grids? They are tied together with a 1.5M ohm resistor.


7189 PP1
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