Harmonica Amplifier

This is a tube harmonica amp I built for my wife. It’s loosely modeled after an old Fender “Champ”. The circuit is a single-ended 6L6 design from Lone Wolf Blues: Lone Wolf Blues 6L6SE

The cabinetry and hardware became sort of an art project:IMG_1225

  • Natural finish pine box-jointed cabinet
  • CNC’d control panel with engine-turned “swirly” pattern
  • Volume dial goes to “11” (of course)
  • Art deco grill cloth
  • Heart shaped icon over pilot light
  • Engine turned label inlay on back panel
Finished the cabinet first. I did the box joints on my milling machine – not the right tool for the job, but it’s what I have. Cutting box joints this way is very slow, but results are certainly precise.


Ready to wire up with the posts all swaged in.




A bit anal about my wiring, but it *does* look cool.


Engine-turned switch panel and knobs that go to “11”…..of course. Lettering was CNC engraved and filled with paint. The heart shaped graphic over the pilot light was much appreciated by my wife 🙂


Anything worth doing is worth overdoing. Hence the engine-turned label panel in the back.
All done. Zenith radio restoration grill cloth for a nice art deco look.

One odd note about this amp is that my wife’s harmonica teacher said to mount the speaker baffle board to the cabinet, not with screws, but with…VELCRO, to get a more “buzzy” sound.


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