Came back to this after a year, because I just ordered parts to build this pedal for some friends, and I still haven't figured out what I did wrong with this one. I know I've checked every component value, even measured the components that allow being tested 'in circuit.' Just installed another set of chips.
Pedal turns on, tone control sounds awesome, volume works,(fooled me into boxing it), fat mod works, everything else, gain, bypass buffer, clipping switch is not functioning. The gain knob fully counter clockwise induces a little whine, otherwise has no effect.
1044 SCPA Voltages are as follows:
1. 8.75v 8. 8.71v
2. 5.05v 7. 5.24v
3. 0 6. 3.84v
4. -3.59v 5. -8.53v
TLC 274:
1. .4mv 14. -2.9mv
2. o 13. -.1mv
3. .1mv 12. -0
4. 8.84v 11. -8.58v
5. 0 10. -0
6. 0 9. 0
7. .1mv 8. 3.0mv
I'm hoping these voltages just scream out at someone.
![](http://i1056.photobucket.com/albums/t366/marcvarner1/IMG_20150408_224802093_zps0edmk9a6.jpg)
![](http://i1056.photobucket.com/albums/t366/marcvarner1/IMG_20150408_224802093_zps0edmk9a6.jpg)
I had the board out of the box and went over the entire board with a loupe and hit anything that even looked the slightest bit not perfect. I am suspicious of the dual gang pot, but I can't see how that would affect the tlc 274 voltages.
Pedal turns on, tone control sounds awesome, volume works,(fooled me into boxing it), fat mod works, everything else, gain, bypass buffer, clipping switch is not functioning. The gain knob fully counter clockwise induces a little whine, otherwise has no effect.
1044 SCPA Voltages are as follows:
1. 8.75v 8. 8.71v
2. 5.05v 7. 5.24v
3. 0 6. 3.84v
4. -3.59v 5. -8.53v
TLC 274:
1. .4mv 14. -2.9mv
2. o 13. -.1mv
3. .1mv 12. -0
4. 8.84v 11. -8.58v
5. 0 10. -0
6. 0 9. 0
7. .1mv 8. 3.0mv
I'm hoping these voltages just scream out at someone.
![](http://i1056.photobucket.com/albums/t366/marcvarner1/IMG_20150408_224802093_zps0edmk9a6.jpg)
![](http://i1056.photobucket.com/albums/t366/marcvarner1/IMG_20150408_224802093_zps0edmk9a6.jpg)
I had the board out of the box and went over the entire board with a loupe and hit anything that even looked the slightest bit not perfect. I am suspicious of the dual gang pot, but I can't see how that would affect the tlc 274 voltages.