Schematic for single rectifier version 1 bias mod

[darthpoodle]

Hello everyone, I was hoping someone may have a schematic for a single rectifier version 1 for a bias mod or could tell me which resistor is the one to mod with a pot.

I couldn't find any info on the version one anywhere so sorry if this has already been posted.

 

[darthpoodle]

In case anyone was interested in this the Rectoverb and the single Rectifier Version 1 are the same. The schematic is on the web and it was easy from there to find the bias section.