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Re: Solid State - the business end.
Tesla List wrote:
>
>
> I am interested to find out the best way to connect the solid state driver
> to the Tesla coil.
> So far I've tried driving a conventional primary (but large voltages sent
> back from the secondary zapped FET's. Now I'm bottom feeding and
> winding working transformers.
>
> Rob wrote:
> > I thought I'd weigh in on the discussion-
> > even though in my own setup- a solid-state driver: the only resonant
> > caps are in the oscillator circuit (a mylar 4700pf unit, and not
> > really resonating: a relaxation osc) and the parasitic series resonant
> > C from the coil to ground.
>
> Where is this capacitor C and what's it doing and should I have one?
This capacitor exists in some distributed fashion all along the coil
to some abstract concept called ground. It can be approximated by a
lumped element. For info on distributed capacitance, there are good
references in RF type texts to helical resonators, although these are
generally mounted inside a shielded enclosure, but you'd get the
general idea.
I would suggest building either my MOSFET circuit or the Duane Bylund
bipolar one, since they both work well. Alot of what I have been
talking about in posts is pure speculation as to how to improve the
current driver ckt. I'd start with what works and then go from there.
I just faxed the schematic to Pike, so we are well on our way to
getting this out to everyone.
Have fun! Rob