Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>
Hi Steve,
Needless to say, measurement of TC output voltage has
occupied my mind for many years. I do have a suggestion:
On 4 Apr 2005, at 8:48, Tesla list wrote:
> Original poster: "Steve Conner" <steve.conner@xxxxxxxxxxx>
>
> Hi all,
>
> I was just thinking about ways of measuring the output voltage of a
> coil. E-field probes like Terry's planar antenna are a nice solution
> but the problem is how to calibrate them. It struck me that if you
> were to use a probe with an easily modelled geometry (a small toroid
> or sphere?) then the calibration could be done using a finite element
> modelling program like FANTC.
>
> Anyone have any thoughts on this?
Why not simply hook a known voltage source (e.g. a stiff 50Hz HV
transformer) to the sphere on top of a resonator in situ? Without
resonant effects to upset the output voltage calibration it should be
easy to physically measure both directly and by capacitive coupling.
In fact I see no reason why 5kHz or even 50kHz couldn't used as long
as the frequency is well below the self-resonant frequency of the
coil. I do like the idea of modelling but think that it _must_ be
verified by measurement no matter how solid the reasoning. I have
reason to suspect that unverified modelling is behind problems we
have found with hypotheses promoted by other researchers ;)
Malcolm
> Steve Conner