Hi Steve, I did replace ic1 early on to get signal to the amps at the start. By jumping the 5066 board the signal stills goes through ic1 ic2 ic3 and ic6 on the effects board right? Comes in on 5069 on pin 1 and out to amp on pin 9 I think, but all the weird effects are bypassed along with half the 5069 board? I will do that next the +- rails look good now on the amp board at 40.3+-. The schematic is poor on the readings of cr4 and cr5. What is the cathode voltages of cr4 and cr5? wilkl check back