[R-390] isolation transformer

[Rasputin Novgorod]

> The only safe way to use these
> receivers is with an isolation transformer.

On my test bench, to power test subjects, I have a Sola,
medical grade, isolation transformer. It feeds a variable
transformer that gives 0- 140 vac, so I can soft start
things. I can also switch, in series, a 60 watt light bulb
for current limiting.

Recently, I found a ground-fault outlet. You know; they
go in bathroom outlets to pop, & kill your razor, should
it be shorted.I was thinking of using it as my test
setup outlet, to indicate a ground-faulted test subject.

I was also considering a grounded wire with a heavy
alligator clip, that I could clamp onto an ungrounded
chassis (i.e. two-wire power corded). However, I've
been told that some gear, especially some test gear,
is intended to have chassis floating, and can be
damaged if referenced to AC ground.

Is this a good idea? Any advice, corrections or
improvements to my "test power" would be appreciated.
I think I'll add a 5(?) watt breaker, to pop before
the shop fuse.

I mostly work on older HP test gear, and boat anchors,
including my R-390a.

Sincerely
/blair