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Tuesday 22 May 2018 at 20:06
Quoted from ronjbell:The wiper of the change stepup unit contact disk is connected to the neutral of the 25 volt winding only. The pop-bumper lamps are powered by the 6 volt winding. I will need to form a "center-tap" of the two windings in order for the lamps to have a netural to complete the cir...
Source: http://pinside.com/pinball/forum/topic/transformer-secondary-windings-forming-a-common-neutral#post-4412009