project /one

Good afternoon everyone, I finally brought back to life a Project/One MARK IV B Receiver that I bought last year. The original owner had disclosed that the R channel appeared to be going out. I worked on it for a while and after not able to figure out what was wrong I set it aside for a few...

Hello all. This is a long shot I feel but I have come into possession of this project one receiver that is in immaculate condition. The only problem is the high tone switch was broken at some point. I’m now trying to open it up and repair it. I have added two pictures below but I’m unsure how...