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

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

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
-> >
-> > --------------------------
-> >
-> >
->
->
->
->