Fireball Classic
Bally, 1985You're currently viewing posts by Pinsider YeOldPinPlayer.
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You can use the 1n4004 for both coils and switches, per this post: https://pinside.com/pinball/forum/topic/tilt-not-registering#post-4317733
The 1n4148 were likely used for cost. $1 at Great Plains Electronics gets you 50 of the 4148 (2 cents each), 20 of the 4004 (5 cents each). An insignificant difference when you're using 20 a year but if you're a factory using tens of thousands it's worth using the cheaper diode.
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