pot value for volume box

[jschwalls]

what is the best pot value for volume control... most schematics for volume boxes and such show a 100K audio.

also what difference would higher values have ?? like 250K or 500K

thanks..

Jon

[petemoore]

  A pot wired as V is 2 resistances.
  the output is where they meet at one end, the center, the other end, everything 'inbetweens'.
  One gets bigger, the other gets smaller as you turn the pot, employ DMM, or figure the wafer goes around the pot the long way around the lugs, at one end of rotation the wiper touches the end lug.
  Look at the outside lugs of the pot as a resistor from SP to Gnd. [with the volume max., the wiper [output] is 0ohms to the signal path [input], that leaves resistance to ground only.
  500k pot = a 500k resistance potwafer between signal path and ground, noticably a little louder than a 100k resistance would be.
  But turn the 500k pot to 1/2, and there's now a 250k [linear pot for discussion BTW] resistance INtroduced to the signal path, higher resistances tend to attenuate high frequencies...so may tend to sound dull at less than 'x' [higher] setting.
  So...in the interest of further knowledge, try a 100k, then a 500k, then a 500k with a treble bleed cap [across the SP lugs] to let a teeny bit of treble pass the resistance introduced at lower settings.
  So there is some voicing involved, perhaps you'd like the treble to bass ratio to increase at lower settings..use a larger bypass cap.
  Higher resistances from SP to ground = less signal loading.
  If you have a really low impedance driving the output, a 10k pot might be the 'right' value.

[jschwalls]

great info thanks... I actually did a treble bleed and like the results alot better....thanks

[nico13]

Here are good answers to your questions: it depends on what you want your volume box for.

http://www.ernieball.com/faq_content.php?subjectcode=vol_pedals