Members Login
Username 
 
Password 
    Remember Me  
Post Info TOPIC: Please check the readings on my FuzzFace clones.


Status: Offline
Posts: 6
Date:
Please check the readings on my FuzzFace clones.


I just built a couple of FuzzFace clones and I've got them set up to read appx.-4.5volts on Q2's collector but apparently I need to be concerned about the voltages in other areas of the circuit, or so I've been told anyway.


The first fuzz has a pair of NKT275 Germanium transistors, I used GEO's gain testing method and came up with Q1=65hfe and Q2=70hfe.  As for resistors, in R1 I've got the standard 33k, R2 is the standard 470 ohm, R3 is a resistance of 5.25k, and R4 is the standard 100k. 
The voltages read as follows...


Q1 base= -0.14V
Q1 collector= -0.96V
Q2 base= -0.96V
Q2 emitter= -0.78V
Q2 collector= -4.8V



The next fuzz has a pair of Germaniums that I got from Small Bear and according to Steve Daniels Q1=89hfe and Q2=141hfe.  The resistors are as follows......R1=39k, R2=470ohms, R3=6k, R4=150k.
The voltages read as follows...


Q1 base= -0.14V
Q1 collector= -0.94V
Q2 base= -0.94V
Q2 emitter= -0.8V
Q2 collector= -4.5V



BTW, both Fuzz pedals sound great IMHO, I was just wondering about these different voltages, if they're pretty much in line with a good old original FuzzFace?  Do these numbers look ok?



__________________


Status: Offline
Posts: 84
Date:

They look great to me!

Phillip


__________________
Fuzz Central DIY Effects
Axis Guitar Effects
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us


Create your own FREE Forum
Report Abuse
Powered by ActiveBoard