Amplified parts NPN fuzz face range master

G

Gooozen

New member
Hi, finally my first post here! I've been building since a short while so still a novice. Made some fuzzes wich all worked out very well (besides having a transistor wired wrong, once mixed up resistors K for R, had a stupid ground enclosure problem, all was fastly resolved. But now I'm really stuck.

Build this 2 pedal in one housing and the RM side is working fantastically, the fuzz face side however works in bypass but when engaged only white noise. I've been checking the wiring and parts placement at least 10 times. I even changed out the 3DPDT switch and the transistors (2N1308). Tried a probe but don't know exactly which points to contact to follow the signal. This morning I've rewired the complete pedal... no change
I suspect there is something wrong with the jack sockets.

Can anybody help me in the right direction, to solve this??





IMG_4019.jpeg IMG_4017.jpeg
 
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White noise means there is no signal from the RM going into the FF. I see you are using thein and out stereo jacks. Just plug in a cable and check with the multimeter where the signal flows.
 
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hamerfan said:
White noise means there is no signal from the RM going into the FF. I see you are using thein and out stereo jacks. Just plug in a cable and check with the multimeter where the signal flows.
Click to expand...
The FF should be going into the RM. When engaging the switch for the FF the pin with should have the FF has very low volume sound and there it stops. Replaced the switch, same thing happening. And now suddenly the FF LED is pulsating fast also.
 
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jwin615 said:
Not sure what the problem is but those transistors look like AliExpress knockoffs.
View attachment 102190 Did you measure them for leakage by chance?
Click to expand...
I purchased them from a well known e-shop (banzai) in EU. Anyway tested them in the RM position for normal functioning since I have no transistor measurement tool. The functioned properly in the RM position.
Did a reflow and scraping between the eyelet holes. Changed out the led and resistor. Now I'm again to start. Bypass sound and light working properly, RM works fantastic, but FF only gives hiss. When I up the leven the hiss gets louder.
When I trace with an audio probe the sound from the switch pin at the FF in is very weak compared to bypass, at the boards first capacitor there is no sound. I find continuity at that point with the ground. I think this might be a problem.
All help is appreciated
 
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