Wow, after reading this I realized I left out a lot of important info, so here's try two :
Hi! I'm Mason, a junior in high school. I am currently working on rewiring an old theatre organ I got the other day. Here's a picture of the organ:
One of the features of this organ is it has a chime box that is driven by solenoids:
For the most part, reading the keys is easy, but not so for driving the solenoids, due to their high energy demand. I don't know if they're true solenoids. From what I can tell the coil is partially suspended and has a rod resting at the bottom. When it gets energized the rod shoots up and strikes the chime. These were the best pictures I could get of it:
I can't really get a cross-section without physically sawing the chimes in half, but here's the bottom part where the solenoids attach to the wiring:
I managed to misplace my voltmeter, but it said 18 VAC . I didn't have the equipment to measure amperage, but I used measurements that someone else took on a similar setup.
The solenoid power source is pretty much this transformer:
The reason I hesitate to use relays is because of the loud clicking sound. It might be masked by the chime sound itself, but I'd prefer not to have a chorus of clicks with each chord.
I could in theory wire up relays to that transformer, but I want to do a clean room wiring to prevent anything sketchy from happening (the organ is 50 years now). DC is way more convenient than AC, so I was looking into switching to DC.
Thanks for all the helpful questions and comments!