Grand Prix flipper buzz
I have tried and had a professional tech try to minimize the buzz in the flippers. You can touch the mech and of course lessen it.
1. Best Solutions?
2. Has anyone ever upgraded to a modern flipper system?
Best you can do is new coil stops and plunger. Make sure all the screws are tight. Short of that, not much you can do with AC flipper coils. They are inherently buzzy and sometimes not much you can do to make them quieter.
Make sure your cabinet switches and EOS switches are clean and gapped properly.
It's not preventable without modifying it non-factory. If you get some bridge rectifiers and DC coils it won't buzz anymore, but it'll also get much stronger and can damage the machine. New mechs won't help, it'll still be AC
My game is like this too. Completely rebuilt flipper mechs. I also believe I installed new flipper coils. Still buzzes when I hold the flipper up. The flipper drops when the ball strikes it in a held position also and I've futzed with the EOS switches for more time than I care to spend. New flipper cabinet switches also. I've just learned to enjoy the game this way. The flippers on my Gottlieb are completely silent.
A properly rebuild and adjusted Williams flipper will not buzz any worse than any other manufacturer.
I see you have a GP here in KC
You are welcome to try and see if you can make it better.
Glad to pay you for your time
On the plus side if you do want to DC and hot rod your flippers, there's already a DC circuit under the playfield running the pop bumpers you can steal power from. Might want to open up the EOS a little bit if you do this though as they will be a lot more powerful.
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