Informant zero gain mod

[ScottOldGuards]

Hey all, recently built the informant (drv) and really enjoying it, but have just been reading about the zero gain mod from 1981:
"When you turn the DRV knob all the way down, it takes all of the distortion side of the circuit, and you only hear the preamp. In order to get a useful sound out of this mode, you need to completely open up the CUT knob (turn it all the way down)"

This is a mod that he's putting in some versions of the drv, but I was wondering how I might achieve this mod in the informant, or whether it's possible at all?

Thanks in advance

 

[thunderaxe]

what happens now when you turn the DRV knob all the way down, and what would you rather have happen?

 

[jwin615]

The drive stage opamp should have just over unity gain with the drive pot turned down.
I don't know that a mod is needed
Maybe he's paralleling the drive pot of a different value and a different value R9 to get it to a true gain of 1 instead of 1.1ish?

 

[juice886]

Actually with a stock version at minimum gain you'll have it somewhere around 20 before the clipping diodes. So there should be some light overdrive at minimum gain.

 

[cdwillis]

I assumed when he said you only hear the preamp it meant the first gain stage. I wouldn't be surprised if it wasn't something as simple as removing the 1k and replacing it with a jumper in the second gain stage. Does anyone know if the DRV has been tweaked at all since the trace was made?