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Re: Seibt: Visualizing Standing Waves on a Resonator by Corona

Original poster: Kurt Schraner <k.schraner@xxxxxxxxxxx>

Hi Antonio, Terry, Ed Phillips,

the tuning is not critical, because (I'm guessing...) this to be a fairly lossy, broadband arrangement: I'm getting 7 to 4 standing wave corona zones, for tapping 4 to 15 turns on my 19 turn primary. However about one half of a turn matters, to get some "best" results. There is no detectable flickering of the corona, depending on tuning. Tuning low number of turns, is making weaker corona zones, tuning higher, results in sparking at the upper or lower end of the Seibt-coil. I'm yet trying to have brighter corona...

Thanks Terry, for your friendly comment. I really hope to post better evidence of the phenomena, when having the photos of my traditional style camera film (slow to finish, and unsave, it having developped, the way I like, for the "black" pic's). Shure, the Seibt works, and the human eye can easily enjoy it... :-)

Ed, you may have noticed, I'm using my slightly modified version of your DC-resonant cap-discharge induction coil driver for this system. It's now working nicely. Thanks again for your kind support. I'm also aware, moving a neon bulb along a resonator, would be an easier way to show standing waves. But I liked this old Seibt-coil style display, 'cause showing it that original way, making corona zones, and all of it _simultaneously_, in space instead of time.

I don't know, if a Lecher-line might be forced to showing corona zones, by some of the easily available means of my 'lab'. Regarding frequency, it's shurely a different baby.

Best regards,
              Kurt

P.S. Just had this link for a Lecher line demo:
http://www.intuitor.com/resonance/standingEwaveDemo.html

Tesla list schrieb:
Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>
<snip> 
The wires would not vibrate at hundreds of kHz...
How critical is the tuning? What happens when the system is
out of tune? I imagine that the effect appears and disappears gradually,
as it is caused by a series of "bangs" producing always the same
waveform on the coils.
A similar effect can be observed at higher frequencies too. See
the classical experiment of the "Lecher wires". With enough voltage
for excitation (connect the wires in parallel with spark gap), the
effect appears as corona across the wires.
Antonio Carlos M. de Queiroz