The d3a is a great little high gm pentode to strap as a triode for use driving smaller DHT’s.


Its not got enough grunt for a 300b. But it sounds wonderfull driving 2a3 or 45 (and if I could afford them the British output DHT’s).


  • Valve rectifier and choke power supply.
  • James output transformers.
  • CCS loaded d3a for linear operation.
  • Audio Note copper PIO coupling caps.