Hi there, I'm having trouble with a Foxx Tone Machine built from the layout on this site (
http://tagboardeffects.blogspot.co.uk/2012/03/foxx-tone-machine.html)
It sounds just like it should except theres is a high pitched ringing noise constantly on, even when there is no guitar plugged in. I can't tell if the gain knob effects it but the tone a level pots do. It becomes harsher and higher pitched with all pots on full and is present in both the normal and octave up modes. Has anyone had any problems like this on a pedal before, I've built around 20 now but have never come across this sort of sound.
I'd be so so grateful if someone could help me out with this as i LOVE how the pedal sounds but the ringing sound just makes it unusable.
Im using 2N5088s
Q1
C-2.08
B-0.71
E-0.14
Q2
C-7.58
B-2.08
E-1.49
Q3
C-6.83
B-0.81
E-0.23
Q4
C-7.30
B-0.82
E-0.27