Electron Tube Audio

Electron Tube Audio

This section is devoted to my electron tube audio projects.  Some are modifications to existing amplifiers, while others are “from scratch” designs by yours truly.  The projects are listed below, in the approximate order of their inception:

  • Thomas PA – 6V6GT push-pull beam tetrode power amplifier
  • Buttons – 12AU7 line stage preamp with all the buttons
  • Dad’s PA – “Williamson” push-pull pentode power amplifier
  • Dynakit ST-70 – an old, dead Stereo 70 in need of resurrection
  • Tubelab Simple SE – single-ended triode/ultralinear power amplifier
  • Tubelab SE – 45/300B single-ended directly-heated triode power amplifier
  • Tubelab Simple PP – EL84/6CW5 push-pull power amplifier
  • Harman-Kardon A50K – 7355 push-pull integrated amplifier


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