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Short Wiring
>> That artifact is called "leakage inductance" and it behaves
>> exactly like one had put an inductor in series with the transformer.
>> To make matters worse, it follows V= Ldi/dt, so the faster you quench
>> your gap, the higher V will be!
>I think this is another good argument for making the tank wiring as
>short as possible too. Not only does the energy in the wiring outside
>the primary coil not get coupled to the secondary, but it is left free
>to re-impress itself on the stray primary capacitances with major high
>frequency rings the result
Additionally, i would expect each chunk of wire to resonate, as an
open, or grounded at each end, line at frequencies determined by
the wire length. This has a couple of bad effects:
energy lost from the stray hf radiations is LOST (does not
show up in HV), and
This lost energy arrives, as EMI, at the neighbor's TV,
FM, the local PD radios, etc, etc.
The whole primary side is shock excited, and anything that can resonate,
will, at a frequency set by its dimensions, if nothing else...
regards
dwp