Tone Bender (3-knob Boutique) Transistors

Started by Blaze, July 15, 2007, 07:45:16 PM

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Blaze

Sorry if this has been posted before, but I couldn't find any substantial info on this. What kind of Germanium Transistors should I use in the Tonebender Mk II from GGG.com? Specifically the 3-knob Boutique one. I know to get them from Small Bear, but what kind? None of the layouts list any specifications. Thanks! ;D

petemoore

  I believe there's a tonebender 3 transistor set available at SB..
Convention creates following, following creates convention.

smallbearelec

The set I offer is typically a 2SB77 for Q1 and unbranded U.S.-made old stock for Q2 and Q3. Typical "real" gains are 70 for Q1 and Q2 and 100 to 125 for Q3. I arrived at these choices entirely by experiment. I recall seeing a thread here by a guy who investigated the biasing and came up with "correct" values, and maybe someone will post that link.