400k sub pot for 250...

[petemoore]

I've built the Sonic Distortion, and used a 400k for the drive pot [OA feedback loop calls out a 250k]
 What effect will having the larger value pot here make on the function of the ckt?
 Will the right size smaller pot here 'drive' the ckt more?

[Ammscray]

Where did you find a 400K pot??

Anyways it's easy, just use a "cheater" resistor across the two outer lugs of the pot to bring down the value...probably a value between 330K and 470K should bring you right in the ballpark...if it's a log taper, it may make it a bit more linear, whether that's of any concern to you...

[Andy]

If you use a higher value pot on the drive control, you will have more drive.  Simple.  Amscray described bringing down your pot closer to the correct value.

I would like to know also,....where in the world did you find a 400k pot?!  Are you sure it's not 500K?

[petemoore]

I've had it laying around for sometime [no schems have called for any so far] and it says 400k [stamped in the back] on it.
  anyway it's in there...werks bout like it should ... cuts the gain ... gains it up. No biggie cuz I don't worry much about taper types on drive pots because I leave em set for the most part anyway.
  Thanks for the posts guys...ya learn something every day if you read/post at Arons...

[petemoore]

I've had it laying around for sometime [no schems have called for any so far] and it says 400k [stamped in the back] on it.
  anyway it's in there...werks bout like it should ... cuts the gain ... gains it up. No biggie cuz I don't worry much about taper types on drive pots because I leave em set for the most part anyway.
  Thanks for the posts guys...ya learn something every day if you read/post at Arons...