[AMPS] High Power Supply Question

[geo@ipass.net (George McCrary)]

Hello Folks,

        I'm in the process of building a 3-500 amp from the dregs of
someone elses earlier project. I have the power supply built, but the
power transformer I used was designed for 220 VAC nominal rather than
the 240 (plus) that I have at my outlet.

        The problem is that with a standard capacitor input filter my
no-load voltage is around 4300 VDC, which is a bit high for a pair of
3-500s.

        Using a variac I have determined that 220 VAC gives me 4000
VDC no load. With the voltage dropping to 3400 under load.

        Short of using a variac is there any practical way to lower
the primary voltage?

        I have tried using a choke input filter, but my loaded voltage
was only about 2700 VDC, which is less than I would like.

                                        Regards,

                                        George (KQ4QM)



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