Vintage Mechanical Pulse Generator Rotary Phase Converter. This unit came from a large. Neat old rotary sine wave maker from what it looks like. We care enough to take multiple pictures of our items for sale and all pictures are of the actual item for sale. All pictures are of actual item for sale. _gsrx_vers_566 GS 6.7.1 (566). The item “Vintage Mechanical Pulse Generator Rotary Phase Converter Motor Speed Controller” is in sale since Thursday, July 24, 2014. This item is in the category “Business & Industrial\Electrical Equipment & Supplies\Other Electrical Equipment & Supplies”. The seller is “austieiscute” and is located in Boise, Idaho. This item can be shipped worldwide.