Well, I found out why the set ran better at 105V. This is a very good lesson to learn and I'm surprised I didn't do some real damage.

The knob with built in pointer indicator on my variac somehow loosened up, and at what I thought was regular line voltage, was in the area of 130VAC :eek:

Fortunately, I didn't run it but for more than maybe a minute total at that. It's a good lesson I learned to always check the calibration on your equipment.....

She's running perfect now :)

Wow.
A good argument for adding a volt meter to one's variac....

Absolutely. Or just get a better variac. Mine is a 5 amp Adjust A Volt that weighs a ton, but with all the work I do I really should have something with a meter and a built in isolation transformer.