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Old 07-31-2019, 01:37 PM
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Quote:
Originally Posted by Dave9111 View Post
IThat 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.
FYI - I used inductive coupling to the coil lead for the scope, so you are not seeing any DC components. Ringing is a good description of what happens, I think when I counted the divisions on the screen it seems to be in the RF range - 2 MHz maybe?
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