(Topic ID: 266506)

Bally late EMs - why no diode on slingshot coils in rectified circuit?

By Dono

4 years ago

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Latest reply 4 years ago by zacaj
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Mata Hari EM Bally, 1977

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Gottlieb system 1 had diodes on pop bumpers and slingshots.

There is a difference between a coil energized directly by a switch, and a coil energized by a driver transistor.

A diode is necessary to protect the driving transistor from voltage spike caused when coil drive stops. But a switch just may show some arcing, without any problems.

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