Fan-Tas-Tic
Williams, 1972I am in the process of replacing some coils and a lot of sleeves but noticed the new coils come with Diodes and none of them on the PF have any.
I am just wondering should I retro-fit diodes on all the coils before the game starts getting used regularly?
pasted_image (resized).pngpasted_image1 (resized).pngDiodes are to protect static-sensitive and reverse-current on electronics items. EMs use switches and relays, so they're not needed, yes.
Quoted from Coyote:Diodes are to protect static-sensitive and reverse-current on electronics items. EMs use switches and relays, so they're not needed, yes.
I thought they were there to protect the bridge rectifier from damage?
Quoted from jclocomotion:I thought they were there to protect the bridge rectifier from damage?
Usually because the switches that activate the coils (like playfield switches) are between the coil and the rectifier. 
Quoted from zacaj:Some games do have them from the factory though, for some reason
Really? Huh. The EMs I've seen never had any. But granted - I'm far from an EM expert!
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Birkenhead
Rochester, NY