Super quick pot resistance question - ZVEX SHO

[chumbox]

Hi All

I'm having a brain block today and need a quick piece of simple advice.

Building a ZVEX SHO and want to remove the pot so it's flat out all the time e.g. the dial is fully clockwise, and put a volume pot on the end instead.

Being a 5K pot if I want it flat out all the time do I put a 5K resistor in it's place or run the Source straight ground to have it running flat out all the time?

Schematic for reference if necessary:
http://www.matsumin.net/diy/bunkai/Z_vex_SHO/Z.Vex_SHO_sch.BMP

Noob question, just really lost the plot today.
Thanks

[GibsonGM]

I would tack in a pot (whatever you have, 1K, 10K....) and dial in the amount of drive you like.  A smaller value is going to make the SHO overdrive more, but there will be a point of diminishing returns (so just tying source to ground might not sound that good).  "Flat out" might not sound that great...YMMV tho.

What you'll end up with is a source resistor like 1K, or 470 R, 150R, or something.    Or perhaps you WILL like how it sounds just tied to ground...

[chumbox]

Thanks GibsonGM

That answers my question perfectly and also great advice about making sure it is the sweet spot first.

[mth5044]

Perhaps just use a trimmer and set it to whatever you want. Could be that your next amp sounds better with a different setting or whatnot.

[GibsonGM]

Perhaps just use a trimmer and set it to whatever you want. Could be that your next amp sounds better with a different setting or whatnot.

^^ Yup! ^^  

Y/W, chum, it's why we come in here....the thing is, sometimes if you dime things, they just go all 'square wave' on you, and sound like junk.....as mth suggested, a trimmer will let you dial in a nice tone that you can tweak later if you want to!   I doubt the SHO, having only one stage, is THAT radically dirty, but adjustment is nice...