Author Topic: Why do all pinball machines hum ?  (Read 771 times)

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Offline GORGAR 1

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Re: Why do all pinball machines hum ?
« on: December 16, 2014, 09:35:17 AM »
Our stern ST hummed from day one and I put it down to the fluoro. I replaced it with one of the led kits and no more hum (well at least not one I can hear). Just our example; not very scientific though :)

Same here it's the ballast apparently :)