Volume Pot not working - Either sound or no sound - help!?

[nomorebetts]

Hey guys!

I just finished up a build of the Rebote 2 delay from tone pad.
(http://www.tonepad.com/getFile.asp?id=50)

It sounds great however my level pot seems rather useless the way its working at the moment.
If I turn it all the way down it kills the sound... good.  I turn it up a fraction the sound kicks back in but even if I turn it up all the way it doesn't get any louder.

I thought maybe the pot was dead so I swapped it for another one of the same value (100k B),  but it does the same thing. 

I'm not sure what else it could be, it's wired correctly. (I think).  Is this because its a linear pot and not an audio taper as usually used for volume?

I'm still rather new at this stuff so any help would be appreciated.

Cheers!

[petemoore]

I thought maybe the pot was dead so I swapped it for another one of the same value (100k B),  but it does the same thing. 
  If there's no alternate current path through the circuit, the pot can also be tested by measuring it with the DMM.
  I'm not sure what else it could be, it's wired correctly.
  If it sounds good, no need to fix on it.
   (I think). 
  Is this because its a linear pot and not an audio taper as usually used for volume?
   I bet it is...where's that page about tapering resistors for altering R sweep of pots...anyway, it's easier to try out an Audio pot = Logorythmic or Log taper for 'regular' wired volume pots, linear taper seems like the control is all 'bunched up' near one end of the shafts rotational range.

[PRR]

Linear is correct. With a 0-10 knob, "2" should give 20% of max. Since this is not an overall volume, but the ratio of delay to direct, linear is appropriate (unless you like very teeny effect).

> up a fraction the sound kicks back in but ... all the way it doesn't get any louder.

Sounds like you got two wires swapped on the pot. Down, it shorts-out the 2399 chip. With a 100K pot, anything over 1K ("0.1" on a 0-10 dial) will un-short the 2399; after that it gets only a trace louder.

Re-check your wiring assumptions.

[nomorebetts]

Sounds like you got two wires swapped on the pot.

I swapped the wires between log 1 and 3 of the pot.  It seemed to make a slight difference but like petemoore said above it still feels like:

the control is all 'bunched up' near one end of the shafts rotational range.

I'll try it with an audio pot now.

[nomorebetts]

I soldered in a 100k A pot and the sweep is much more gradule!  However only about half of the sweep is useable.
I can probably live with this unless others have an idea.

Thanks for the help!