pot substitution..?

[fegg]

hi, I dont have a 250k-L pot (for depth setting) for an EA trem Im building, what could I sub for it
I have 100k-L or 470k-L or an old alps 200kW ...what would be the outcome of using either of these?
(im not far enough in to the build to check myself!)
cheers.

[petemoore]

  how many wires coming off the pot's lugs ?
  is it a voltage divider or an adjustable resistor?
  If it's an adjustable resistor:
  stick the 470k in there, and see what max resistance you like, measure the resistance at max setting you like...if it's about 100k then stick a 100k in there.
  Or..put a 470k resistor across the pot lugs.
  Or put 250k resistorS across the pot lugs 1 between lugs 1/2 one between lugs 2/3, or any two values you choose which add to 470k...[1/2 of 470k is pretty close enough to 250k].
  two paralleled 470k's = 1/2 of 470k.
  two seriesed 250k resistors parallel to a 470k = close to 1/2 of 470k.
  any two resistors which add to about 470k parallel with 470k = ~1/2 of 470k [which is near enough 250k.

[fegg]

great!  plenty to be going on with there, I'll try the two resistors in parallel, see what happens

p.s. it is three wires on the lugs, dont know if it that's a voltage divider though 

[petemoore]

  3 wires assigned to a pot = voltage divider, it divides up voltage between the rails in %ages like 80/20 or 50/50 or 35/65.
  2wire pot assignments = variable resistor, ie 1 resistor position, if it's a 100k pot you can adjust resistance from 0 to 100k.
  so...3 wire assignments may need the potwafers value [lugs 1 and 3, outside lugs don't change R value] to be a certain value, as it may be used for bias or in some other way.