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Re: Tesla Coil Measurements

Hi Viv,

Be sure to check out my page at:

www.peakpeak-dot-com/~terryf/tesla/experiments/experiments.html

	For simple ring downs and such, a CB radio or other antenna loaded with a
50ohm resistor right at the scope input works very well and gives pretty
accurate wave forms.  If you are really trying to be accurate, see my
plane-wave antenna at the above site.  I also do fiber optic stuff but that
is pretty involved.  A simple piece of wire will show a lot but you really
need to load it somehow to keep the input capacitance of the scope from
attenuating high frequencies or the wave forms loose high frequency
information.

	Terry



At 03:00 PM 4/29/99 +0100, you wrote:
>Hi All,
>    I am interested in making electrical measurements of the characteristics
>of a Tesla coil in operation.  Particularly the ringing down of the primary
>and ringing up of the secondary.  I have an oscilloscope and would like to
>know any recommended and safe methods of making measurements.  Also I am
>interested in observing the current phase with respect to the supply voltage
>to see the power factor.  I have a current transformer with a moving Iron
>ammeter.  If I measure the voltage across the ammeter, is this going to be
>in phase with the supply voltage or supply current?
>
>regards
>
>Viv Watts UK