the "glow thing" in the sound hole is a vacuum tube used as a preamp in action. See: Valve Amp, The Reso-cone is made of two stainless steel bowls with different diameters, I cut the bottom out of the bigger bowl then glued the smaller one upside down in the hole (maybe visible on the "Batteries" pic).
Comments
Huh! Cool ideas. Thanks for the info.
Hi John,
the "glow thing" in the sound hole is a vacuum tube used as a preamp in action. See: Valve Amp, The Reso-cone is made of two stainless steel bowls with different diameters, I cut the bottom out of the bigger bowl then glued the smaller one upside down in the hole (maybe visible on the "Batteries" pic).
Looks neat. More description would be nice. What's the glow thing in the sound hole? What is the reso?
Very nice indeed.