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RE: TC potential measurements
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- Subject: RE: TC potential measurements
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Tue, 15 Mar 2005 19:33:20 -0700
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Original poster: "Christopher 'CajunCoiler' Mayeux" <cajuncoiler@xxxxxxx>
Terry, I'm intrigued by this plane antenna
device... but for those of us who can't
afford an o'scope, can this be adapted to
work with a common analog meter, such as
the Simpson 260 or similar?
C.L. Mayeux, MsEE
Owner, MSB Data Systems
> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Tuesday, March 15, 2005 7:55 PM
> To: tesla@xxxxxxxxxx
> Subject: Re: TC potential measurements
> Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
> Hi DC,
> At 06:21 PM 3/15/2005, you wrote:
> >Terry's planar antenna and a 200 kV DC power source gave us good
> >which we compared to the spark length measurement method. We
> use a 7" dia
> >Van de Graaff sphere for most of our measurements. We used a
> 14" dia sphere
> >for the large coils with toroids in excess of 4 ft dia.
> >Values were in very close agreement.
> Glad you are enjoying the little plane antenna so much ;-)) For those
> interested, the details are here:
> >Even our Big Bruiser with it's 26 ft. long spark at 26 kVA was only
> >developing 865 kV! We thought it was over a megaVolt but measurements
> >provided the truth.
> At first I worried that models were predicting such low
> voltages... But it
> proved to be correct.... In the case of Bruiser, just round to
> the nearest
> MV :o))) I think Bill's #13 is rated 25MV ;-))
> The DRSSTC makes streamer formation of low voltage little arcs building
> along a path formed by the previous arcs to form the big arc pretty
> obvious... "Disruptive" or pulsed arcs are now well known to arc at far
> greater distance than the equivalent CW cases...
> Marco now seems to have achieved the real "holy grail" and has a system
> going that can directly measure TC output voltages at high bandwidth
> without loading down the coil oddly!!!
> >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.
> I "think" they are messed up by being near very high voltage AC
> fields... The measurement active columns are not shielded to the extent
> need to be immune from high dV/dL near them... But Marco an Paul
> seems to
> have things figured out (or they will real quick now ;-)).
> In a short time, we will have some very accurate data to
> ponder!!! We also
> have OLTCs and DRSSTC that can reproduce sparks to stunning accuracy and
> can be fiddled with quite independently of all those things that used to
> annoy us so much!!
> But now worries. It will still be some time before National has
> a TC in a
> 16 pin DIP ;-)))
> >Dr. Resonance