• 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.

Jadis JA-30

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i came across this pcb apparently using jadis ja-30 design. attached below you can see that it does not have a grid resistor. is that safe to run without it.

i plan to run it with KT88s and about 500Vdc B+ and need some guide into choosing the proper output transf of 50W into 8 ohms. can someone help? thks
 

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