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Roth/Eck Bipolar


Nicholas Denney

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With my loose understanding, I believe this is actually a rotary converter? Or it is designed for both AC and DC use as a motor?  One side is slip rings and the other is a commutator and the commutator side has what I would think is an original wooden pulley. There is a "secondary base" which houses a beefy toroidal coil. 

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