Charlie Brown v4 Crickets

Chuck D. Bones

Well-known member
Twisting the IN and OUT wires together is a definite no-no. Separate the IN & OUT wires between the board and switch and to the jacks.

It is a cool sound though, might make a good ring-tone if it was louder. :p
 

RCZ

Member
I did all you said and I try other TL72 and one RC4559 and the noise still there...

Some new ideas?
 

zgrav

Active member
Are you are getting the noise even with nothing plugged into the input? Do you have a different power supply you could try on this pedal? Some pedals are more sensitive to noise from a supply than others.
 

Chuck D. Bones

Well-known member
Or try a battery. Single-ended circuits like this one have pretty poor power supply rejection. There really should have been a resistor in series with D100. Does the cricket noise change if you turn the DRIVE control? If you have an audio probe, try probing IC1-7. There's a 100uF cap (C17) on the output of an opamp, which IMHO is very bad. It should have been on the input side of IC1.2. If you get noise on IC1-7, try removing C17.
 
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