> Dieselhead wrote:

> I found 50 Amp bridge rectifiers.  I figured I could use 2 in 
> parallel to be able to pass 50 to 70 amps.

Nope.  Not unless you have two transformers.  Each diode will
have a _slightly_ different turn-on voltage, so the one that's a
touch lower will hog all the current and the other one will not
do much of anything.

You can build your own bridge out of four individual diodes.

> So wire the variac to the rectifiers, (AC side) then hang the
> BHC across the DC side of the rectifiers.  Is that right?
> (DC to the iron cathode and anode.)

If it were me, I would wire a high value resistor across the
capacitor to dissipate the change so that after 10 or 15 minutes
the "hairy" is gone from your BHC. 

--   Philip

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