Trying to bias ge Fuzz Face for replacement transistors

[Purplexi]

I am trying to fix an Arbiter reissue Fuzz Face which looks very cool, sounds bad. For this first project of mine, I removed the Tungsram AC128's and sourced some older TO1 red dot AC128 cans that seem to have good stats. My problem is I can't figure out how to come up with voltages and other stuff to bias the new transistors. I tried online bias calculator but can't put that together. I have read here that when in doubt, add a 20k trimpot in place of the ...third resistor? 8.2k? Here's a pic of one set I've installed already. They sound like NKT's, VERY good, but need more cleans. So, bias time, right? Also, instead of 33k, 470k, 8.2k its 47k, 1.5k, 22k Thanks

[swever]

Here's some links that could be useful

http://www.muzique.com/lab/fuzz_face.php

http://www.geofex.com/Article_Folders/ffselect.htm

[Purplexi]

Thanks, but I am clueless how to work this calculator or what VBE is.

[goo]

470 K? no no no. it should be 470 Ohm.
you could try to put 50K trimpots for R1 and R3.
R2 = 1K.
R4 = 100K.
1K Gain pot, 200-250K Volume pot.
thats what i`ve tried and it works well.

[Electric Warrior]

These will probably bias just fine with the stock values (i.e. 33k, 470Ω, 8k2). Install these values and then take some voltage readings between each of the transistor leads and ground. That should tell us more. If the bias is off, the 33k is the one to tweak, but we'll see about that. The rest is down to transistor selection. You've got a handful to choose from. Shouldn't be much of a problem.