Noise issue with personnal build (NEED HELP!!!)

[Jean-Rock]

Hey guys.....just wondering if anybody can help me to reduce noise to this.....



It's a Torn's Peaker clone modified to my taste.....I grab it from the Devi Ever site, so it's supposed to be what it is.....a Torn's Peaker.....

There's a "SHHHHHHHH"......I don't hear it while playing but when I stop it become annoying..........when I roll off the volume knob of my guitar I can hear something like a radio station.....kinda weird !




I tried to pull down a 100uf cap from r5/r6 to GND and it works pretty well (even if I have no idea of what I'm doing....hehe     But 5 seconds later the noise get back to annoye me again  

Anybody can help me identify where in the schem I can do something to get rid of that noise

Thanx !!

[hammerheadmusicman]

Shielded in an out wire? May reduce a little noise..


George

[Jean-Rock]

Shielded in an out wire? May reduce a little noise..


George

Maybe that could help.....but it's same wire than my other builds, and they're quiet. And I work on a breadboard trying to figure it out....

Thanks!

[RobA]

The breadboard can add small amounts of capacitance all over the place and that can actually help control noise. So, moving a design from breadboard to PCB can sometimes increase the amount of noise.

You could try putting small caps of around 100pF from collector to base of the transistors, especially Q3 and Q4. It might help.

[Jean-Rock]

Thanx for the tip....but it didn't work for my issue.

I finally resolve by adding an electro cap(10uf) from R5/R6 to GND. The noise come back slowly after I stop playing but it's crystal clear while playing, and it doesn't hurt the sustain at all. I'm pretty happy with it !

I also change R7 for a 43K. It added high end definition when playing the "Salt" button    completely clockwise.

I really like the sound ! Cheers !

[Jean-Rock]

I was wrong about the 10uf cap....it sucks a bit the tone.....

Finally add a resistor (R8) from Q2 collector to GND....it reduce a bit the overall volume and the  undesirable without sucking tone.......

that's gonna be all for this circuit. Thanx !