[ndutton]

Originally Posted by Dave9111

That is really great that you were able to attach pictures of a scope trace!

As you can see this is nothing close to DC! DC would be flat lines that shift up and down as the points go open and closed. The inductance of the primary and secondary limit the current flow and create the "ringing" that you see in the scope trace.

This is incorrect. The direct DC application of Ohm's Law certainly does apply and here's why: With the ignition points closed you have a simple DC circuit energizing - - and heating up - - the primary windings in the coil. There is nothing else going on other than direct current flow during that time (dwell). The resonance happens only when the points open to interrupt the circuit and the stored charge is dumped. Only when the points open does the resonance apply and Ohm's Law does not. It is a simple matter that with the points open there is no DC current flowing.

Originally Posted by roadnsky

I wonder if we should move this discussion to a new thread to avoid confusing future reader's?
Especially if they just jump to the last page...

It's probably too late for that. As has been the case for years, we'll just have to let the results speak for themselves. It's too bad we have to keep reminding about those results.