Re: Voltagee measurement

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ghunter31014-at-yahoo-dot-com>

Try applying mains current to the secondary winding
and reading the voltage on the primary. I expect where
you live the mains is 240VAC/50Hz? Apply that to the
high voltage winding and use an ordinary pocket
voltmeter to read the voltage on the primary winding.
Should only be a few volts AC due to the big
step-down. This will give you the turns ratio which
will give you reasonable guess at the high voltage
output when it's hooked up the other way round.

Greg
http://hot-streamer-dot-com/greg

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Kamil Kompa by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <tcmail-at-poczta.fm>
> 
> Hi !
> 
> I have a trouble with a transformer. I don't know
> it's parameters, so I
> want to measure voltage 
> of the transformer (i think 5 to 20 kV). How can I
> do this?
> I found that spark apears between the electrodes
> connected to the
> transformer when the gap is about 15mm (between
> sharp nails) and about 6mm
> gap is required when electrotes are two spheres (no
> sharp edges).
> I know that breakdown in air is about 30V per
> 0.025mm, but which distance
> schould I use for accountings (6mm or 15mm)? 
> I also noticed that when nails aore little wider
> than 15mm on the top of
> one of them appears corona. (sparks striking to the
> air in the direction of
> the other nail). There is no corona when I use
> spheres separated with more
> than 6mm of air.
> Could you tell me something about the output voltage
> of my transformer
> having this data?
> Thanks for all answers.
> 
> Kamil Kompa
> 
> 
> 


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