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Re: 3/4 wavelength secondaries
Hi Richard and all,
In the light of what you say in your last
paragraph in this piece, there is something here that I desperately
want to understand.
<major snip>
> Finally, the voltage produced by a Tela coil is a function of the
> resonator coil's inductance and the current injected into the base. The
> top terminal may load this a bit, but the value of the voltage created in
> the system is not determined by the top C at all. I hope this helps this
> thread a bit.
My understanding is that for each shot, the secondary rings up as the
primary rings down until Cp is empty. There is then a finite amount
of energy available to charge the terminal capacitance. How can the
terminal reach a voltage higher than that allowed by conservation of
energy? I have grappled with this one for a long time now. The Corums
(oft quoted as an authority in this area) make no mention of this
fundamental limitation in a cap discharge system (at least in the
notes I've read), but appear to treat the secondary/extra coil as
though it is fed from a voltage source (which a capacitor most
definitely is not).
In fact the situation is even worse when one takes the awful gap
losses into account.
Malcolm