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Re: SSTC does 10 foot sparks
Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz>
Below I'll give two clear examples of why I left energy
considerations behind in the dust wrt TCs:
On 23 Jun 2004, at 22:46, Tesla list wrote:
> Original poster: Mddeming-at-aol-dot-com
> In a message dated 6/23/04 11:33:27 PM Eastern Daylight Time,
> tesla-at-pupman-dot-com writes:
> Giving an efficiency in power makes perfect sense. Most devices are
> rated in this way. A motor has a certain electrical power in, and a
> certain mechanical power output. The efficiency is defined as
> Mechanical power out / electrical power in. A heater, lightbulb, and
> many other devices can be given an efficiency rating the same way!
> What doesn't make sense is to say we have a motor which has a certain
> power output, and then try to calculate the energy output by lifting a
> mass, or some other means and at the same time monitoring the input
> power and integrating - much more of a pain, and will arrive at
> (approximately, due to measurement error) the same result.
> Hi Sean,
> Power makes sense for the devices you cite, but only because they are
> fairly constant and continuous power-in, power-out devices with a load
> that can be held constant during testing. None of this applies to a
> Tesla coil. The input and output occur at different times, are of
> different durations, different waveforms, different frequencies. In
> this case, a good argument for energy measurement can be made.
> Matt D.
40J (for example) can give a totally different sparklength under the
#1 - a single shot of 40J into cold air vs a shot of 40J into a hot,
well-established streamer path
#2 - 40J under either situation coming from substantially different
secondary coils, i.e. the L/C ratios and hence output voltages for
one thing being totally different.