Hey gang,
what I'm looking to do is make a simple phase inverter for a stereo amp so I can bridge it. The schematic is simple and I know I can safely use a 741 or better opamp and just invert the signal going to one of the power amps.
However, for grins and giggles, if I wanted to do this with a tube...Knowing I need plate voltage..the amp supplies roughly 220volts for a preamp tube already in the circuit.
I'd like to do this and I'm just asking to make sure I have the info I need:
1. Input impedance of the driverstage as is
2. Output impedance from initial driver stage to actual power amplifier modules.
3. Gain loss or recovery in said stage.
I'm thinking of using a 12BH7...if it can supply enough gain.
what I'm looking to do is make a simple phase inverter for a stereo amp so I can bridge it. The schematic is simple and I know I can safely use a 741 or better opamp and just invert the signal going to one of the power amps.
However, for grins and giggles, if I wanted to do this with a tube...Knowing I need plate voltage..the amp supplies roughly 220volts for a preamp tube already in the circuit.
I'd like to do this and I'm just asking to make sure I have the info I need:
1. Input impedance of the driverstage as is
2. Output impedance from initial driver stage to actual power amplifier modules.
3. Gain loss or recovery in said stage.
I'm thinking of using a 12BH7...if it can supply enough gain.