SD-1 not Good!???

[siaoguitar]

I've got a SD-1 that was modded by my local guy , it's not a keeley mod, but i realised that with the drive knob from 10 o'clock to max, there's no difference to the sound, what happened? Why does the sound remain relatively the same ? should i change the diode, or change the mod back to stock? Can anyone help?

[petemoore]

I can't see what you've got, I don't know what you want.
 A schematic with listed changes texts, also an idea of what it is you want to get out of the box may help.

[Bernardduur]

Ask the guy who modded it if that suppose to happen. Maybe a solder joint got loose and it is saturating after 10 o'clock (something like this happened once to me).

[Mark Hammer]

Could just be the wrong taper so that all the usable resistance changes occur within a few degrees of rotation, or could be the pot needs cleaning.