I ran into the fading coil problem on my led zeppelin premium. Instead of fans, I replaced the coils with the PBLife upgraded LOTR coils. The coil wiring is noticeably thicker and heavier. I then lowered the flipper power way down to compensate for the more powerful coils. This seems to have fixed my issue. So, is it because of the thicker wire combined with less power = less heat therefore better even performance? I have played 40 min games without issue since. Id personally rather do this instead of fans. Nothing against the fan makers or doers.
Mike
Quoted from Tuukka:The fading occurs because the single winding coil has pretty thin wire. With increasing temperature, the wire resistance gets higher, thus decreasing the current through coil - and its strength.
"Old style" double winding coils have pull-in winding in heavy wire with less turns, so the increased temperature affects coil strength much less.
I see it somewhat amusing that flipper coils today need cooling, since for over 50 years nobody would even think about coil cooling.
