Thanks Pyro, that's what I wasn't able to put together. My multimeter is less than accurate at these resistances, but it seems like the it could be from 2 to 5 ohms which means that it is pointless to even run the transformer at 25 watts since any resistance less than 6 ohms can take me over 2 amps.
So I'll try running it at 12 volts, add a fuse and see where it gets me. I already picked up a fuse holder and bag of fuses. If I burn through them too fast I'll think about getting a breaker.
Not sure what to do about a fan since I would need a separate power supply to run most of them, I suppose I have some room in the enclosure so I fit a wall wart in there. I would also like to add a bulb so we know when the thing is on, a small incandescent bulb inside a cage would have a nice retro look to it (because such things are important!). Of course if I'm going that way I should build a nice wood enclosure...
Make it happen.