I need pictures. I've never looked at primary voltage and current with an oscilloscope. I copied the attachment off the Internet and added arrows pointing to discussion points A, B, C, D and E. First, will someone please verify that this is suitable waveform for a points distributor and not the HEI or Hi-Tech stuff of today's modern engine?

Questions:

A = points closing?
B = current ramp?
C = points open?
D = inductive voltage spike?
E = negative current (coil primary field reversed polarity)?
Attachments
Waveform 02.jpg (34.65 KB, 109 downloads)

Last edited by buoymaker; 09/12/2020 2:46 AM.

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."