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More current = more magnetic pull
Ohm's Law ... I = V/R where,
...I = Current
...V = Voltage
...R = Resistance
Holding voltage constant, reducing resistance (with fewer windings), increases current.
There are tradeoffs.
I'm sure a bonafide EE can chime in.
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info
The easiest demonstration would be to power two WMS coils side by side, powered from the same source, and devise a method to test magnetic pull. Perhaps ability to hold a paper clip attached to a string in mid air. The -1200 will be able to hold it at a longer distance.
The 26-1500 and 26-1200 would work well since both use the same gauge wire and the same size bobbin.
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info
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Chesterfield, MO