Strange Fuzz Face problem

Started by Dooter, December 30, 2011, 12:31:03 PM

Previous topic - Next topic

LucifersTrip

Quote from: Dooter on January 16, 2012, 01:51:53 PM
OK thanks.
I raided the stores at work today and found we had six vintage AC128's they seemed better quality than the tungsram ones i got off ebay. Two were dead on testing but the other 4 had leakages of 200uA or less. The gains were 99,100,140 and 200; so I should have a decent pair now.

I also found about 30 bc108's some with gold pins some with silver. I tested 3 and got gains of 200,400 and 1000!? what's the ideal gains for a pair in a silicon fuzz face npn setup?

there's no "ideal" gain, just what you like best. I can only make 2 suggestions, and again, not set in stone. Choose Q2 higher gain than Q1 and choose a pair that you hit 4.5v close to 8.2K

good luck
always think outside the box