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need info for proportional controller


rray
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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

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