• 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.

Amp idea - your commend pls

My idea is to built amp for esl speakers.
Tubes will be as follow:
- 6c45 or 6c19 input (from DAC), choke loaded, cap coupled to
- VV52 transformer coupled to
- GU-48 (833 from Russia) direct to esl.

Power supply:
- 872s for GU-48
- 866 for VV52
- Solid state for input

Does anyone have experience with GU-48?:confused:


for ESL´s you need a push/pull signal, means two signal out of phase. How will you manage that with a single ended Amp without Output Transformer ????????????????????????????????????????????????

A good recomendation is the Morgan Jones Book
"Valve amplifiers, second edition" There you find a dirct coupled amp with tramsmitting triodes.

My mistake sorry – 2 off GU-48, two off 872 in power supply for each channel, etc…
I didn’t say single-ended, transformer coupled signal to the end stage will pass through secondary winding and feed two GU-48 (in push-pull or maybe I should call this dual reversed single ended…?) configuration.
I try to avoid using two off VV52.
Thanks for your answer.