RE: Neon Sign Transformers (was: spark length formula needed*)

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

Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


David -

The meters I used were typical RMS meters that are accurate for good sine
waveforms but would not be accurate for distorted sine waves. I did not use
a scope so cannot say what the the waveforms looked like. However, the input
waveforms would be better sines than the output waveforms. If waveform was a
factor wouldn't the VA input be larger rather than smaller than the VA
output?

Thank you for the url which was new to me. In this article the author says
that the current would be less for distorted sine waveforms when compared to
good sine waveforms.

John Couture

-----------------------------



-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Sunday, December 23, 2001 12:52 PM
To: tesla-at-pupman-dot-com
Subject: RE: Neon Sign Transformers (was: spark length formula needed*)


Original poster: "David Halliday by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<dh-at-synthstuff-dot-com>

Actually, the issue here is probably that the power measurements were not
done using a "true RMS" meter.  The waveforms in a loaded NST and resonant
Tesla Coil circuit are *not* a pure sine wave and most non true RMS meters
are basing their readings on their assumption that the incoming waveform
*is* a pure sinewave.

For more reading on this check out:
http://www.tinaja-dot-com/glib/muse112.pdf
( Acrobat reader needed )




-> -----Original Message-----
-> From: Tesla list [mailto:tesla-at-pupman-dot-com]
-> Sent: Sunday, December 23, 2001 11:54 AM
-> To: tesla-at-pupman-dot-com
-> Subject: RE: Neon Sign Transformers (was: spark length
-> formula needed*)
->
->
-> Original poster: "John H. Couture by way of Terry Fritz
-> <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
->
->
-> Marc -
->
-> The NST is a strange beast. I have done numerous tests of
-> NSTs with varying
-> RC circuits. In some test the volt amps input was LESS than
-> the volt amps
-> output. An apparent violation of the laws of physics. Every
-> coiler should
-> make these tests and study what is happening. Tesla coils
-> are also strange
-> beasts like NSTs.
->
-> John Couture
->
-> ------------------------------
->
-> -----Original Message-----
-> From: Tesla list [mailto:tesla-at-pupman-dot-com]
-> Sent: Saturday, December 22, 2001 9:01 AM
-> To: tesla-at-pupman-dot-com
-> Subject: Re: spark length formula needed*
->
->
-> Original poster: "Metlicka Marc by way of Terry Fritz
-> <twftesla-at-qwest-dot-net>"
-> <mystuffs-at-orwell-dot-net>
->
-> John,
-> Maybe what you are calling a "hanging tale" might be more of
-> an accuracy
-> then you think? Even trannys of the same wattage would, or
-> maybe, have a
-> wattage\time relation?
-> so for a bank of nst's compared to the pole pigs, the pig will just
-> charge faster?
-> Just idle thinking, but??????
-> Also, any config i throw in for my pt's, i always use the
-> pole pig. so
-> this most likely accounts for the accuracy's. Maybe nst bank users
-> "should be" using the pig option for a closer spark length output?
->
-> Marc
->
-> Tesla list wrote:
-> >
-> > Original poster: "John H. Couture by way of Terry Fritz
-> <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
-> >
-> > Marc -
-> >
-> > Thank you for your interest in the JHCTES program.
-> Although this program
-> has
-> > taken several years to develop based on real world coils
-> the program still
-> > requires improvement. One example is the spark length
-> parameter. The
-> program
-> > shows that the spark length increases as the power source
-> voltage (NST
-> > secondary) increases. This voltage is also dependent on the voltage
-> > regulation of the source, and thereby hangs a tale.
-> >
-> > The voltage regulation differs for NST, pole transformers,
-> bombarders,
-> etc.
-> > Because of this variation the spark length for a NST at a
-> certain apparent
-> > wattage will be less than for a pole transformer, etc, of the same
-> wattage.
-> > The JHCTES program does not take voltage regulation into
-> consideration and
-> I
-> > have never heard of any spark length equation that does.
-> Some day when
-> > enough test info becomes available, this voltage
-> regulation parameter can
-> be
-> > added to equations and computer programs.
-> >
-> > Voltage regulation for a certain power source can change
-> with the type of
-> > load applied. This may be the reason that some coilers
-> have found a jump
-> in
-> > streamer behavior when the power changes because Tesla
-> coil operation is a
-> > varying load type of operation.
-> >
-> > John Couture
-> >
-> > --------------------------
-> >
-> >
->
->
->
->