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Re: weird resonance with HV cap



Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Hi,

I can't think of any reason it would do that. The homemade cap might have a poor connection or something so it is not all in circuit. Try wiggling connections and such.

http://myweb.tiscali.co.uk/teslatutorial/MEASUREMENTS.htm

Cheers,

        Terry


At 05:59 PM 3/15/2006, you wrote:
So I've got a function generator and a scope and I'm trying to build my
primary to match my secondary. The frequency I'm shooting for (as
measured with scope and gen on the secondary) is about 340 - 350 KHz.
So I've got my primary lying on the ground tapped about 2 turns in, and
when I use a small ceramic disk capacitor of value (measured with a
capacitance meter) 5 nanofarads I see the tank ringing at about 340 KHz
but when I substitute my homemade cap (also measured to be about 5
nanofarads) it rings at about 670 KHz. I measured both caps with the
same meter so I'm thinking this must be a secondary harmonic I'm seeing
but I don't see the tank ring at 340 KHz when I turn the gen down like
it should. Does anyone know whats up wit dat? Is there any reason why I
wouldn't see the fundamental and only the harmonics with a HV cap?