fuzzy boost into valvecaster

[alberdmonak]

This is my very first post, so:
hello everybody! i'm alberdmonak.

This afternoon i was looking at the big fat tube/boost/valvecaster-thread and thought it might be a very interesting project for a beginner like me(my first built is a modded fuzzface). But in fact, i'm looking for something more fuzzy. Then i wonder:
-if it's possible to put something like the first stage of a fuzzface in front of a valvecaster?
-if a valvecaster can be positive ground?(in order to put it with the half of a pnp fuzzface without using two power supplies)
-does anybody know where i can find tubefuzz schematics?

thank you


ps: please forgive my english

[brett]

Hi

the first stage of a fuzzface

The first stage of a fuzzface doesn't make much of the FF fuzz.  And it's not such a great booster.  Something like the beginner project, or the Stratoblaster would be better.
Fuzzy valve stages require high gain, and can be unstable and noisey if not designed well. Usually they run at high voltages (200 to 400 DC on the plates) to get the transconductance levels up. A very nice example of such a design is the cascode boost in the Firefly.
A simple, safer option is to use a high-gain transistor boost followed by a low voltage valve stage. 
cheers

[petemoore]

  The FF is really a 2 transistor feedback loop high gain amplifier, the circuit needs 2 transistors to bias 1.
   Rangemaster has better bias setup, LPB booster..any booster.
   "Tubefuzz'' is the original Craig Anderton CMOS design, many TSF-derivitave schematics are floating around, unbuffered chip required IIRC.
  Can say it was tube-like tone, can't say it kept workin' here tho. gotta try another one day.

[alberdmonak]

thank you

i think i'll try the lpb-into-valvecaster thing. I'll toast myself using high voltage later.

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