Original poster: "Gerry Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
Hi Chris,
Gerry R
Original poster: "Christoph Bohr" <cb@xxxxxxxxxxxxxxx>
One strange thing happened several times. After running smooth for a minute or two, the transformer as well as the variac started humming and current draw increased to 30A. This effect lasted for one or two seconds, then disappered. Every once in a while it reappears, even at different variac settings. Maybe some kind of resonance I suspect.....