Re: Pig Ballast measurements
> >I changed scales to look at the "60Hz" output voltage. about 28kV with
> >occasional 75kV peaks! Yes I check this 3 times. No wonder I'm
> >seeing/hearing such a difference between resistive and inductive
> I expected at least some scepticism from someone. Is everyone on
> I'm not sure that I believe the 75kV peaks myself!
> Would anyone with a scope, HV probe and ballasted transformer please
> double check some of my measurements.
Firstly, the small tuned circuits formed from small chokes with their
low self-C, short paths and low capacitances can be rung up quite
easily to those levels with the energy available from the primary
cap and the transient shocks provided by the spark gap.
Secondly, you can't always believe the scope. When is a ground a
ground? I have observed the most horrendous overshoots in digital
circuitry earlier in my career (careering?) which could be traced to
long scope ground leads, stray L's and C's formed BY the scope
connection etc. Tricky indeed.