Hey all,
Im designing a od pedal, and i needed to add a gain control to the circuit, so i did this just befor the input cap:
-------||---------------
| 100pf |
| |
/ |
\ 250K |
/ <-------------
\
|
/
\
/ 10K
\
|
grd
It works great, except that theres a big leap in distortion just before turning to full gain. Any idea on how to stop this ? ps, im using a 250k LOG pot. i think thats right...
It's likely that the big leap is caused by the log pot. Try a linear taper pot to smooth out the increase in the last part of the rotation.
Or reverse-wire your log pot for the smoothest tweaking.