[need info for proportional controller]

i got 2 of these from another pack rat
he said they date from the 80's
i tested them with a light bulb and they work ok
i can not find a datasheet for them
would one of these, a rectifier, and capacitor work for a stepper power supply

http://www.ebay.com/itm/Lot-of-6-Douglas-Randall-Proportional-Controller-Model-R15A-120V-15A-/150800378506

richard

[howto remove platter from hd spindle]

Can someone tell me how to remove the platters from this spindle motor without using cutting tools

Richard

[Identify a capacitor]

Good, I was wondering if maybe the 10 on the end of the number string meant 10%. I will have to wait to order one until I have enough to justify the shipping charges.

Thanks
Richard

[Identify a capacitor]

A capacitor in a power supply exploded. It is 2200uf 25v. I attached a photo of the other side. Is this just a "standard" capacitor?