Quote:
Originally Posted by MikeK
You may not get a spark at all, or at best a very weak one. Without the cap to directly absorb the reverse EMF the waveform falls at a much shallower and irregular slope, as the electrons must wait their turn to arc across the points. If it does run, the points will be toast in about 20 minutes. I've seen this demo on a dizzy machine with a scope.
Unrelated subject- I'm clueless as to why only half of your monitor top valve seat corrodes. Turbulence erosion?
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Ah, that makes sense. So the cap is needed for the circuit to work properly as well as protect the points.
Unrelated - Not sure on the valve seat, I'm wondering if its flash gas which apparently is also a big problem in modern day units destroying TXVs. I'll probably never know why its happening but the cap tube will solve the problem anyway.