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.
Hi,
I want to modify the attached schematic that is posted in the RCA tube manual. I would like to use the preamp without any bass or treble controls. What do I need to remove in order to use this as a straight preamp?
Hi!
You can connect cap 0.1 uf from cathode 1-st triod to 1-st grid /pin 8/.
From pin 8 to ground - resistor 1 mom. All elements around "bass"
and "treble" You must disconnect /0.1mom, 1 mom, 10000, 0.0022,
0,022, 0.1 mom, 220, 1 mom, 0,022/.