I did post this message also on Arons stompboxforum but haven't got an answer for the problem, so I hope it is ok to ask this thing in here
My friend bought new cry baby classic Model - GCB95F and played it once on the period of 1,5 years (quarantee time expired). Now he tried it again and it sounds like this (first bypassed) :
Also the guitars pu-selector makes lots of noise when moving it. When bypassed the selector is silent.
I went trough all solder spots on under the pcb with no improvement. Every component seems to be fine. It is smd-based circuit. Two IC's. Here is three pictures of the circuit:
Mat, I had a Dunlop Wha that did about the same thing, comin and going with distortion sound as it died out, i found a transistor that was off due to a resistor value that had drifted out of spec and the electrolytic cap after the inductor had lowered in value, another part that can go bad and cause problem's is that Tant. cap, you may find a bad Transistor if the pedal has low hour's on it, the problem's i had were on an old Dunlop that probably had lot's of hour's on it.
Johnhenry
Johnhenry wrote:Mat, I had a Dunlop Wha that did about the same thing, comin and going with distortion sound as it died out, i found a transistor that was off due to a resistor value that had drifted out of spec and the electrolytic cap after the inductor had lowered in value, another part that can go bad and cause problem's is that Tant. cap, you may find a bad Transistor if the pedal has low hour's on it, the problem's i had were on an old Dunlop that probably had lot's of hour's on it.
Johnhenry
Thnks for the answers
Those Q1 and Q2 transstors seems to be so tiny that I'm not going to try to replace them.. I think I'll build simple VOX style circuit in there. Joe Bonamassa uses stock VOX and I like his wah sound alot Maybe my friend will like it too.
Mat,
FWIW I have a late model Dunlop GCB-95 (pre-SMD) and a 60's VoX Italian made V-846. Since I acquired the Vox, the Dunlop is up for sale as the Vox sounds way better. I noticed the Fasel inductor which my Dunlop did not have so your friend's may sound better than mine. I will say the Dunlop sounds better bypassed (still sucks a wee bit of tone though) than the Vox, which is a big tone sucker. Whatever you do, it may be a good idea to add true bypass.
whit
Tonegeek wrote:Mat,
FWIW I have a late model Dunlop GCB-95 (pre-SMD) and a 60's VoX Italian made V-846. Since I acquired the Vox, the Dunlop is up for sale as the Vox sounds way better. I noticed the Fasel inductor which my Dunlop did not have so your friend's may sound better than mine. I will say the Dunlop sounds better bypassed (still sucks a wee bit of tone though) than the Vox, which is a big tone sucker. Whatever you do, it may be a good idea to add true bypass.
whit
Thanks, I will definitely put a true bypass in it. I might build the axis wah from the fuzzcentral..
