Tesla coil Build comparison. (Proof of ability)

[TinselKoala]

Hellow 2 all.. I have a question, is it possible to make 100,000 sparks in 1 second?

Yes.

But there are pitfalls. If you are trying to make a spark gap circuit controller that operates at that rate, like a rotary spark gap, or a fixed gap in a 100 kHz resonant primary tank circuit, you  must avoid the "power arc" that results when conductive gases/plasmas remain in the gap and short it out. This is not as easy as it might seem at first glance.
The reason my MOT-DC SGTC works so well with only one MOT and only 2kV in the primary circuit is because of the spark gap. I use an intense blast of compressed air to "blow out" the spark in the simple 2-element adjustable gap, and prevent the power arc from forming.

http://www.youtube.com/watch?v=yjc9ilOAaQU

This coil easily produces quasi-continuous (really split at line frequency)  18-inch high-energy sparks to ground or the conductive walls of my experimental chamber. The gap performance is probably the most critical aspect of this kind of resonant system.

http://www.youtube.com/watch?v=tTLFlRhsa5U

[Farmhand]

Look! A ONE MILLION VOLT Tesla coil! !!!! (sic)

http://www.youtube.com/watch?v=-qKl_JhNVWM

Looks like it's barely putting out a inch or two spark at quite low frequency, not nearly 1 million volts. Theoretically my transformer
could develop 1.7 million volts but the charge leaks off way before then. I can run it at about 300 Watts input without it sparking
or leaking any carona, but without any load more power causes leaks as it must.

Neo-x, my coil used a rotary spark gap that could run up to a couple of thousand breaks per second, but it makes best sparks at
a lower break rate of like 400 BPS, a faster break rate supplies the energy more consistently and less abruptly if the input is
restricted.

Solid state arrangements that work at the actual resonant frequency and input power with every half cycle or every cycle produce
a different type of discharge which is like a spray rather than quick violent jets (sparks) discharge.

I just realized I didn't link to my clip where I vary the break rate of the rotary gap. In this clip I vary the break rate up to over
1000 BPS. It shows the difference between regular sparks and a "rope" like discharge to ground, like a slow motion lightning
strike to ground. The sound is from the terminal sparks the spark gap is fairly quiet.

Varied break rate.
https://www.youtube.com/watch?v=1nkJtrKCdFg

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[Neo-X]

Thanks Farmhand and Tinsel your comment helps me alot. Now i can start to build my own tesla coil. 

[TinselKoala]

TinselKoil VII first light.

http://www.youtube.com/watch?v=t2sldgRoZqU

I just built this one over the past two days. I was inspired by Tommy Reed's simple flyback driver "Tesla coil" and so I wanted to make a complete Tesla coil using one for the primary supply. I used a more efficient oscillator geometry and made a matched primary and resonator according to the calculator linked below.

This is a hybrid ss-sg coil powered by 24 VDC input. It uses a ZVS oscillator with 2 ea.  IRFP260N mosfets to drive a TV flyback transformer through a 10 turn, centertapped primary winding on the ferrite, which produces the HV for the primary tank circuit. The ZVS cap bank is about 1.4 uF and it drives the flyback at around 30 kHz which is the best output frequency for this flyback. The Tesla tank capacitor bank is 10 ea. 400 pF 30 kV strontium titanate doorknobs in parallel for 4 nF roughly, the primary is 9 turns on a 4 inch diameter form for 9 microHenry roughly, the secondary resonator is about 975 turns of #27 on a 1.68 inch diameter paper mailing tube, soaked in polyurethane before winding, then coated with several coats after winding. The coupling is about 0.12, quite loose. The spark gap is a 4 element parallel-tubular type of brass tube bits. The top capacity is a couple of 5 inch cake pans taped together and the sphere with breakout point is a Chinese chime exercise ball.

I used the calculator here:
http://www.classictesla.com/java/javatc/javatc.html
to calculate the basic dimensions and values. The coil isn't completely tuned and there are still some problems with the gap, but I think it is decent, so far. When it is completely tuned and I bump the input up to 48 volts... look out!

Ah, I love the smell of ozone in the morning.

[Farmhand]

Wowsers, I like that one too ! How many is that now and are they all in some significant way different to each other ?

Stand back. 
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Oh can you get a still image if you get the time/chance, please ? I like the stills. Fascinating. I use some for background images for
the computer desktop, and I should make a Giff. screensaver or something. Anyone know how to do that already in Gimp 2 ?
.
And a tip from one of the guys posting in the Figuera thread about solving the over sized images problem. There is a "ADD ON"
for Firefox browser which allows us to resize images on the web page and if we do all the images on a certain page then we can
read the words without scrolling sideways. It's a really handy Add on.

Image Zoom 0.6.3 for Mozilla Firefox (web page image resizer)
https://addons.mozilla.org/en-US/firefox/addon/image-zoom/

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