Don't forget that the output voltage of a DC supply (after being rectified and filtered) will be 1.414 times the transformer output voltage (AC).
A transformer with a 72 Volt AC output will give a DC output of approximately 101.80 Volts DC. A transformer with an output of 50 VAC will have a voltage of 70.7 Volts DC after the rectifiers and filter capacitor(s). |