Welder Diode
 

Hello
I am in the process of rebuilding an older MILLER TIG welding machine,
have replaced two of the smaller bridge rectifiers, very low current draw on
these units, may have to replace the heavy working rectifier, newer welders
use four 300 amp. 400 volt Diodes hooked to alum. heat sink , the older SR
are the style used in the 1960 era, I guess the question is this, could I
use a lower current diodes in parallel or would this cause a problem, this
would allow more area for heat dissipation and smaller diodes would be more
available, old orange colored Rectifiers were wired in parallel with a
couple of long bolts sandwiching everything together, any comment would be
appreciated.
Thanks
Phil