I generated low-level AC voltage using a sound program on my computer -- I looped a 60 hz sine wave, and ran it through my mixer for amplification, and then into the transformer. On this side, the voltmeter read 2 volts rms AC. The other side of the transformer read 1/3 of a volt, which would indicate a 1:6 ratio stepping down. BUT...
I tried flipping the transformer around, which ought to have changed its ratio to 6:1, right? And it gave me the same reading, 2 volts in, 1/3 volt out. Hmmm.
The other model of transformer (the one with 11 pins) gave me a surprise -- the incoming side read 4 volts rms AC, and I couldn't find any current or voltage whatsoever on the other side. Confusing! Time to search the web, I guess, and see if I can determine more info about these components based on their ID numbers...
-- Z
