[Texasrocker]

To bring down plate voltages at the rectifier in the past, I have lifted the ac power trans secondary HV centertap to ground, and added a wirewound resistor of appropriate ohms and watts ratings in series out to chassis ground has worked for me before. Ohms law is your friend in this situation. If the B+ is running too high , adding a bleeder resistor of needed value and wattage required across the 1st filter capacitor to ground helps also. I didn't take a close look at the schematic, I left my reader glasses in my workshop tonight. Please excuse me if I made a mistake here.