Re: [TCML] Trans-cap uf matching, over/under?

[DC Cox <resonance@xxxxxxxxxxxx>]

You could get away with this is you keep your sparkgap tight, eg., around
0.180" max.

DC

On Tue, Dec 29, 2009 at 7:22 PM, Brian Hall <brianh4242@xxxxxxxxxxx> wrote:

>
>
> I have a 15kv/30ma NST so the ideal capacitance is .0053 uf, but since I
> don't want it to match impedance with the transformer and risk frying out a
> leg, I have read that 1.3 to 1.4 x that capacitance is desirable, aka LTR
> (larger than resonant ... impedance)
>
>
>
> So, that would give me a range of .0068 to .0074 uf for the tank capacitor
> (at around 30 to 40 kv)
>
>
>
> My question is how would the performance be affected if I were to use 0.011
> uf (a hair over 2 x resonant impedance)?
>
>
>
> And what would happen if I go a bit under it, such as .0033 uf?  What
> effect would that have on the TC circuit or even the hv transformer?  Would
> it hurt anyting?
>
>
>
> Lastly, if I were to connect 2 NSTs of the same value in parallell, such as
> two 15/30 NSTs, to basically get one 15/60 power supply, would the
> calculation for the impedance of the 2 NSTs of Z = E / I (to find the cap
> value) be the same as if I had a single 15/60 NST?  if it were, then .011 uf
> would be a hair above resonance with the transformer, but not as high as 1.3
> x above it ...
>
>
>
> ----------------------------------
> Brian Hall
>
>
>
>
>
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