Holy smokes! That's an old one. Still has the Twinsburg address.
Looks like something or someone got in there and caused a short to the chassis.
I don't think so, There was a large solder blob on that chincy
terminal strip that was arcing to the back panel. The one I'm
working on now has a serial number above 2770 still with the
Tburg addy. Not sure when they moved, maybe just had a bunch
of old labels.
Anyway this is what I came up for the 220 Primary side on
this one. A die-cast bud box with 2 fuse holders, 2 SSR's and an
old 9VDC wall wart. I'm using the original switch to turn on the
wall wart guts which turns on the SSR's. He still "Bangs" a bit
when I hit the switch but all in all, It makes me feel better.
/Dan