Is it possible to set an EM for credit AND extra ball at the same time?

I'd like the credit knocker to sound when I get an extra ball. I bet I'm not the only person to try this, and some Pinsiderer probably figured out how…

I like to have my EMs set to extra ball at high scores and specials for regular play. But I love the sound of the extra credit knocker. Is it possible to somehow jump wire an EM to have the knocker activate when an extra ball is attained? Jumping the two Jones plug sockets together won't work. When the 'same player shoots again' light comes on it locks on the knocker solenoid for as long as the light is on, so that's not a solution. (I don't really care about getting an actual credit since my Williams Grand Prix and Aladdin's Castle are set for free play.)

I'm not the greatest at working on pin mechanics, so a simple (if possible) solution that doesn't require multiple extra wires running from the cabinet steppers to the back box is best. Maybe I'm asking the impossible, but I've seen enough creativity on the forum to have hopes. Henry

Games are Grand Prix and Aladdin's Castle

O-din, I don't want to hear the knocker all the time all game long, just when an extra ball is reached.

Wouldn't the extra ball relay hold switch only lock on the "same player shoots again" light?

Hi rolf_martin_062,

What you propose in words and diagrams is way over my head. Having the knocker sound for free balls would have been nice but the amount of work and changes can't be justified. I was hoping for a simple solution of just hooking up a wire or two, but I can see from the discussions that the fix must be much more complicated. I thank you all for the time and creativity you have shown in an attempt to help me. Henry