Diy vacuum tube (valve) amplifier projects. diy vacuum tube amplifier projects. do-it-yourself the 6cy7 stereo amp uses a 6ca4 tube rectified power supply with. Unconventional techniques for low-power designs a battery-powered guitar amp. battery-powered tube amp schematic. the measured voltages are for our particular. Built this amp from a kit. well i guess building isn't the correct description, assembled might better describe it. it is powered by 2 d-cells and both channels work.
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