I've been working on a 1977 Charlies Angels machine, replaced the pop bumper assemblies completely using all new parts. Bumper switch part# B-17108 from marco, the difference between it and most originals is small gold plated contacts. I've messed with the switch alot and everything I do the ball still falls flat on them, barely poping the ball. Considering the violent spark generated you'd think it would be way better like all other machines I've seen. Not only that I have to clean the contact after 15 mins of game play or NO bumping is the result from very weak.

I was thinking of adding a capacitor between the lugs but no idea how to size a capacitor. Or if even that's a concern. Or maybe something else is going on, I say this because the power for the bumpers is on the same line for the slingshots and the flipper coils. All the coils on this line don't seem to have FULL capacity but it's 24Volts no matter what. I'm going to test the transformer against the same transformer I have in a 1977 Cleopatra machine to see if reading 16VAC on one of it's outputs is proper. How it turns that into 24VDC out of the Bridge recifiers is beyond me.

Interesting dilema and these damn pop bumpers are frustrating.

Thank you!

switch.jpg

Thank you Terry, that makes sense and made a call to get the right switches at pbresource. Steve Young confirmed what you said, I used low voltage switches and they simply don't work. Similar switches I used on the sling shots, have new ones of those coming too! Be like a new game when I'm done!