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.

ARC SP16 preamp Clone

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Yep not a fan of MOSFET CCS for that reason. NPN + zener, NPN + LED or LM334.

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