Turtle: I trust that the power supply is AC only, as that's never been an issue before. I could hook it up to an oscilloscope next time I'm in the lab to make sure. I didn't take DC readings, so I don't know what I'd read there.
Also, it would really surprise me if it was a bad transformer...
I've been running some tests on some simple AC step up transformers, and I can't seem to justify something to myself:
I hook up 12 VAC to the primary coil, but the voltage on the coil is actually more like 1 VAC, when measured with a voltmeter. It's not an issue with the supply--it puts out...