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Re: Output Voltage vs. Firing Rate (fwd)
---------- Forwarded message ----------
Date: Fri, 07 Aug 1998 00:39:43 -0500
From: Bert Hickman <bert.hickman-at-aquila-dot-com>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Output Voltage vs. Firing Rate (fwd)
Mark and all,
A system that has the tank cap optimally "sized" to the NST source will
resonate at the mains frequency, effectively neutralizing part of the
in-built current limiting of the NST's. Because of the higher currents
and voltages available under this condition, it's quite possible to
achieve as many as 3-4 breaks per AC mains half cycle. For example,
under full power, my system runs at between 360 and 480 breaks/second,
at an "average" mains current that's 2-3X higher than the short-circuit
current. In fact, the primary current actually goes down when the main
gap fires(!).
The downside is that the average secondary current is correspondingly
higher. 60 MA transformers seem to withstand the overcurrent abuse
significantly better than 30 MA ones. You also want to insure sure that
the main gap is set not too wide, since the NST output voltage will
climb to destructive levels...
-- Bert --
Tesla List wrote:
>
> ---------- Forwarded message ----------
> Date: Thu, 06 Aug 1998 20:48:04 +0930
> From: Mark Finnis <mefinnis-at-medicine.adelaide.edu.au>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Re: Output Voltage vs. Firing Rate (fwd)
>
> At 20:47 5/08/98 -0600, Malcolm wrote:
>
> ... Snip ...
>
> >I think it fundamentally boils down to power and the best mix of
> >average current and voltage. I have had good results at just 100BPS
> >with a moderately large coil. It is the only one that has performed
> >satisfactorily at such break rates. The smaller coils do not do as
> >well.
>
> With reference to my desire to try a sync-RSG, am I limited to 2 x Fmains,
> ie. with our 50Hz supply aiming for alignment at respective peak/trough at
> 100 bps ?
>
> Has anyone tried 4F, aiming for the shoulders & trying to get 2 pulses per
> AC half-cycle ?
>
> For those of you able to measure such things, what sort of gap firing
> frequencies do you see in well quenched static gaps with NST's ?
> (I appreciate there are *many* variables here, just ball-park rates for
> interest)
>
> ___________________________________________________________
>
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