Just rebuilt my flippers on a 1972 KING KOOL Gottlieb.
Problem: new orange-dot coils HUM!
HUM: not the soft hum, nor the insane ear blaster, but quite a substantial hum right down the middle of the extremes.
Procedure: went wire-for-wire, unsoldering from old, soldering to new. Thus there was no way to goof that up.
New sleeves, the coil stops look fairly new but aren't my replacements.
End result: flippers work! They work as I deem proper: good power, not flabby like before when the ball was tough to get to mid field and floated about. Overall, it functions, but when the buttons are held, there is a hum that wasn't there.
Is this common to orange dots? Did I miss a step? There are no washers on this thing's coil stop, being a Gottlieb EM.
