FF transistor voltages?

[fuzz_fanatic]

im thinking about using trimpots on my fuzz face project so i can use the higher gain germanium transistors i have (over 200). what should be the voltage at the transistors legs for q1+2?

also, what about silicon based fuzz faces? i have some high gain bc108c that i would like to use.

[petemoore]

im thinking about using trimpots on my fuzz face project so i can use the higher gain germanium transistors i have (over 200). what should be the voltage at the transistors legs for q1+2?

also, what about silicon based fuzz faces? i have some high gain bc108c that i would like to use.

 Might sound silly...someone correct me if I'm wrong...
 =What they are when powered with 9VDC, using the shown resistance values.
 Different transistors will show different voltages there.
 Watch the polarity changes if you're using PNP Ge's and switching to NPN si's...I pretest GE FF circuits with Si PNP's I can get easily, when the circiut passes 'basic function' pretest [sounds, and biases somewhat], then I install the Ge's. I've reverse polaritized Ge's before, I think that's why I have a hissy one.

[phillip]

You'll want to see about 1.1V on the collector of Q1 and about 4.5V on the collector of Q2.  I would use a 20K trimpot on the collector of Q2 to dial it in exactly since Q2 seems to be the critical one.  Once you get Q2 adjusted to 4.5V, Q1 will usually be right.

Germanium and Silicon Fuzz Faces should both have the same voltages.

Phillip