Re: 600kV voltmeter

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Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>


I need to add the ground terminal should be a round terminal like a 7 or 14
inch Van de Graaff sphere.

Dr. Resonance

>
> This procedure has always been shrouded in mystery and overlooked by most
> modern physics textbooks, but it's an easy procedure.
>
> The easiest way to measure the sec output is to put a string of diodes in
> the HV power supply with a large resistance --- say 5-10 megOhms.  This
will
> charge the cap slowly and the sparkgap fires once every 5-10 seconds (5RC
> time constant to full charge).
>
> This spark length is measured from the toroid to a 7-12 inch ground
> terminal.  It may then be compared with the peak DC potential charts in
the
> Handbook of Chemistry & Physics.  Use the standard impulse generator chart
> for best accuracy.
>
> This method has long been overlooked by experimenters but is possible
> because the sparklength in a single shot mode is completely independent of
> the waveform (Abbdulah's book on HV Engineering).
>
> Terry Fritz was kind enough to lend me his current and potential antenna
> system which is calibrated against a known voltages source on the toroid.
> The results were within 2% for both small and large coils as compared to
the
> single shot spark length measurement method.
>
> It is a bit disappointing to discover your 4 ft. long continuous spark
> shrinks to only 7 inches in the pulsed mode and gives a true output of
> approx 160 kV.  It's hard on the ego after you have told all your friends
> your coil is running at 1/2 a million volts!!
>
> Ross Engineering also manufactures NBS standard traceable voltmeters
> accurate from DC to 1 MHZ and potentials up to 1 million Volts.  Not cheap
> but very accurate.
>
> Dr. Resonance
>
>
>
>
>  >
>  > I can't remember who or when but I remember someone asking how to
measure
>  > the voltage of the secondary?
>  >
>  > While searching on the web for a " missing ground indicator" I came on
a
>  > website where they sell a voltmeter rated up to 600kV.
>  >
>  > <http://www.aelindia.com/hv.htm>http://www.aelindia.com/hv.htm
>  >
>  > Doesn't look cheap, but it might be what he or she wanted?
>  >
>  >
>  > Best regards,
>  >
>  > Sebastiaan Draaisma
>  >
>  >
>  >
>  >
>  >
>
>
>