Built a "luggable" boombox.


Used two 6T9 "compactron" tubes in Ultra-linear single-ended configuration, closely following this excellent design:

Other parts:

See also:


  • Speakers: 5.5w x 7d x 8.7h (outer) box of 1/2" plywood.
  • One port 1" ID 3" long
  • Two-layer chassis with two "floors" 6w x 8d x 9h.
  • Speakers hook on side of chassis with carrying handle
  • Drawing of proposed layout

Plywood cutting from 18" x 8' piece for speakers:


Last modified 3 years ago Last modified on Dec 31, 2019, 6:39:58 PM