Reply to "All Nation/Varney Ten Wheeler..."

I use a 120-24 volt step-down fed by a Variac.  Output goes through a $2 Radio Shack bridge rectifier and a DPDT switch.

I have circuit breakers on the 120 volt input and the DC output.  A red light tells me I left it on (had to do that on my soldering iron, too), and an ammeter and voltmeter round it all out.

I also have a giant electrolytic capacitor across the output of the rectifier - probably not necessary.