• 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.

Dual 5AR4s in Preamp

Possible lay out for power supply.]
10 1B3's , 19 pound tektronix transformer, maybe 10h 300ma choke and 1000mfd of film caps! should be enough for a single 12ax7.
 

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damn, i just started a design using 4 x 5U4's to power a 2 tube 12au7 ccda preamp.....

this chinese amplifier with 12ax7 cathode follower to supply +-6 volts to that stage used 2 5V4 rectifiers, and that is becuase the cathode followers used dual rails....

mind you this amp sold like hotcakes in manila....
 

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