Bean's hard to find Schematics

These are re-draws of schematics I have found from various places. Schematics without a commercial affiliation i.e. Silvertone, Valco, Gibson are my own design.

Schematic Links & Tech Info

Various Schematics

• 50 W Amp using 6DQ6/6GW6 TV Sweeptubes and other oddities


• Simple 5W amp using a 6T10 Compactron


• Glowbug22: a 15 watter using 12AB5 &12SL7


• Simple amp with 6AU6, 6BQ5 and 6X4


• The Minnesota Amp Builders Raffler


• The Co-operative Guitar Melissa


• 30 Watt amp using 7591


• 1956 Gibson GA20


• An AX84 style november w/12AB5 power tubes


• A redraw of the very good NOVEMBER plexi style amp from AX84.com


• The Silvertone 1303


• The Silvertone 1344. A real strange bird. Funky fixed bias circuit.


• The Silvertone 1434. A good amp with interesting tone.


• The Valco Aztec (or Aztek)


• A Surface mount Fuzz Face



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Supro Thunderbolt S6420

• SCHEMATIC: Supro Thunderbolt S6420 with 5U4 rectifier (UPDATED 02/21/2012)


• SCHEMATIC: Supro Thunderbolt S6420 with Solid State rectifier (UPDATED 02/20/12)


• Supro Thunderbolt S6420 Page

Some quirky tube info

• Why does my 12AX7 flash?


• What about the blue glow in my tubes?

Industrial Relay Failure

• Relay Failure pictures and discussion