You mean the raw DC to the phono regulator input drops? Or the rail voltage after the regulator is 34-36V? In the former case maybe you use highish value filter resistors between bridge and main filter capacitors on the raw PSU board? In the latter case its the normal thing to happen.
I try that when i get off work.what strange is,i build the power supply first ,everything measure at 37 volt at the tranny and Dc voltage is 48 volt at the output by itself ,without hooking it up to the board.when everything is hook up that when the voltage drop.
It takes more rail voltage to go right on TP. Got to fix your DCin higher first. Its not strange, its voltage drop across the 50R in the raw PSU RC by the current draw when you hook up the phono as load. You overcompensated anticipation for possibly bit high trafo secondary with that value.
