I built a silver pony II in the last couple days and it is misbehaving a little bit. I built a silver pony about a month ago that is great, so I have a baseline idea as to what the pedal should sound like. At first I had 2 bad solder joints and a solder bridge on a few wires leading off-board... with those fixed I now have bypass working, both leds work, and the boost-only channel works. Also, the drive channel pots do what they should and the clipping switch changes the clipping character.
Problem is: when the drive channel's drive is down, there is still some unpleasant fizziness in what should be clean tones. A little bit saggy-sounding initially, kinda fizzy a split second later, and as the signal fades the sound cleans-up and seems normal. The "fizz" sound reminds me a little bit of a fuzz with bad bias, so I am assuming my voltage is wrong somewhere (the fizz is also a little bit "phasey/flangey" sounding for the moment that it is audible). The fizz is especially prominent on bass strings and is maybe also there with the drive turned-up, but obviously not noticeable.
Since the back is off, I figured I would check the ICs before pulling them and reflowing solder. Voltages read with meter grounded to output jack sleeve terminal.
Boost tl072
1 4.5 8 16.5
2 4.5 7 4.5
3 4.5 6 4.5
4 -8.8 5 4.5
Middle tl072
1 4.4 8 16.5
2 4.5 7 4.6
3 4.5 6 4.5
4 -8.8 5 4.5
tl072 "near clipping diodes"
1 4.5 8 8.9
2 4.5 7 4.5
3 3.5 6 4.5
4 0 5 4.5
charge pump (7660?)
1 8.9 8 8.9
2 4.5 7 6.8
3 0 6 4.4
4 -4.4 5 -8.8
Those numbers look about like what I expect, but then again I am still pretty green with all this stuff.
Pictures will hopefully be soon after I loosen everything again...
I appreciate any and all help