I know this has been covered before but I cannot for the life of me get the machine gunning slingshots on my Mata Hari to stop. I have adjusted them to no end. They leaf switches are new, new rubber. I cut the capacitors off. Still chattering. I put new caps back on because this machine misses way too many points without them. It doesn't do it all the time but it's enough to be a problem. it happens at least 2 or 3 times a game. I've tried all the advice here on other threads to adjust them. Front blade tight against the rubber. Front blade resting against the rubber. Front blade away from the rubber. I've tried all the different types of adjustments. Could something else be causing this? The contacts don't even look that close. Thank you.

IMG_1892 (resized).JPG

IMG_1891 (resized).JPG

IMG_1893 (resized).JPG

IMG_1894 (resized).JPG

I've just finished rebuilding the slingshots because I thought they were a little sloppy. I had another thread posted here. I will look them over carefully. Let me ask you this. The leaf switches are new. The blade stiffeners are straight, not kinked like the old style. Would it help to put a bend or kink in those blade stiffeners?

I cut the caps off even though they were not old. I had put them on months ago. I put brand new .047 uf 50 volt caps that I bought from Ed at GPE. They were still chattering without them. This game needs caps. It missing too many points without them.

When you say sand the top part do you mean around the outside edges of the spacers?

I don't think they are gold contacts. I got them from Marco. Part # 1A-120. I did not clean them but I will now. I checked for continuity between the blades. There's no short. The diodes are also new. 1N4004. They test ok.

detail-3 (resized).jpg

I take it back. They do look like they are gold contacts.

I did clean them with a plain white business card with no change so far but I will clean them again.

This is very frustrating. I should have just left them alone. I was just trying to make them a little more powerful. I changed the leaf switches, plungers, links, sleeves, rubbers, and even the pivoting arms. The only thing I didn't change was the coils. No change in power at all.

They are 2.5". Brand new from Marco. I will mess with it tonight.

I tried this tonight. The problem stopped completely.

I also tried this tonight. The problem stopped completely.

I adjusted the front blades tighter to the rubber. That seems to have helped. It's not perfect but it's noticeably better. I will keep at it.

I haven't had a chance to take it apart and sand between the blades as LTG suggested. I will do that this weekend.

One casualty in playing the game without the glass. I broke a big plastic at the top of the playfield. Anyone that owns this game knows that the ball tends to jump and smack the glass at the top of the playfield. Not sure if the glass being off caused it but it sure didn't help.

IMG_1897 (resized).JPG

Thanks for the info. I might have a lead on a replacement plastic. If not I'll look into repairing it.

The chattering sling shot issue has been resolved by making sure the front blade was tight to the rubber, the back blade was opened up just a tiny bit more. And also, it's very important to have the blade stiffener tight against the rear blade. That keeps it from bouncing. They may not be quite as sensitive as I would like, but I'll take the trade off. Thanks everyone.