Re: How much does aspect ratio of secondary really matter

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Jared E Dwarshuis <jdwarshui@xxxxxxxxx>

Hi: Aaron

Field control becomes a major issue with a stubby inductor. High
voltage likes to flash across the coil from end to end. (or it hits
the primary). If you can resolve the field control difficulty, then
a.... "reasonably".... short inductor would be preferable due to it's
greater inductance per wire length.

However there is another rub with a short inductor. If the inductor
is... "unreasonably"... short. Then the the magnetic field can no
longer be considered uniform within the core of the inductor and
inductance is lower, then predicted by the classic equation L = u
Nsqrd Area/ Length

Nearly all Tesla coils are lacking in inductance and run at to high a
frequency. Large inductance and a low frequency will give the largest
amplitudes. I doubt anyone will ever build a coil that runs at to low
a frequency with to large of an inductance.

Sincerely: Jared Dwarshuis