Edward Knobloch wrote:
When I bought my used Powerstat, I was told that it was 4 amp maximum.
That may be a wild guess by the previous owner.
(It is not a standard component, was once part of a motorized
voltage regulator). The iron core is about 4 inches in diameter,
and 3 inches long. Can anyone tell me what the maximum rating is?

Throw 60W lamps on it.

When you have enough lamps that the winding gets too hot to touch for
a count of three seconds after the normal amount of operating time, you
are at the rating.

Note that a unit that is rated to 4 amps on a 50% duty cycle at 10 seconds
is probably rated for around 2 amps continuous duty.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."