Re: cap firing voltage scope measurements question
I just had to add another musing to this topic. I think the
voltage hike is really being "tuned in" by adjusting the rotary gap
phase setting for best sparks. Again, I am amazed that a NST should
take it on the nose without dying. I think the better option is to
have a stiff transformer and a separate charging reactor in the
secondary circuit to take half the charging voltage burden. Placing
the choke on the primary side of the pig achieves the same end but
then subjects the transformer secondary to the entire voltage rise.
One can weigh up the pros and cons of where to place the inductor
Secondary side - high inductance needed takes half Vcharge burden
- high V insulation reqd.
Primary side - low inductance needed transformer primary and
(transformed to a large secondary are stressed and
inductor by turns ratio^2) core saturation may occur