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RE: [TCML] TC Newbie
Hi Bart I undertand you completely what you are saying but one gap on my Coil is so slow that the streamers dont load properly with a single gap even if my gap is really close it cant transfere enough of the voltage required for streamer load.I dont want to stick my foot in my mouth but electricity has a "Slow" speed of about 180 000miles per second and I think thats in air.One of my friends Has a camara that can shoot 30 000 frames a second Im still trying to convince him to let me use it near my coil.Computers are limited to the speed of the electrons in the CPU thats why they are now looking at beatel shells for next gen. CPU that will run off light.(Taken from Popular Mechanics mag 2008) I think on an AC Firing gap on the lets say "push" cycle or one half cycle the one leg of the charge will be pushing electrons one way through the system,therefore spark will jump in that direction(And leap frog)When that "Push" Cycle is finished and the AC now "Pulls" all the electrons reverse and the tank charges and fires the gap in that direction,Then the spark will jump according to the flow of all that charge,(Across the gap as if it were electrons flowing one way for what a couple ns?) Therefore in one second at 50 hz 25 times one leg will act like negative or positive(Directional)And for the other 25 cycles it would act in reverse(Other direction) so spark across the gap will first jump(At 180k miles per second)Across air first then into the centre conductor(now that conductor holds all the charge) flow still "Approx 180k"Then back out into air then into the next conductor!My good estimate tells me that it still took time to do what it needs to get to the other side(efficiency losses of SGTC).To us it looks the same but slow it down 180000times and look again. Thanks Gareth
-----Original Message-----
From: "bartb" <bartb@xxxxxxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: 2008/12/11 05:51
Subject: Re: [TCML] TC Newbie
Hi Gareth,
With a multiple gap or single gap, the "total" gap distance (ignoring
electrode material, geometry, surface, environment details) is what
affects the rate of breakdown at a given voltage. With a 2 gap setup,
both air space on each side of the center electrode become conductive at
the same time when the gap fires. It's not a leap frog affect across the
gap in the way that your describing. Thus, the rate (frequency) of
breakdown for a multiple gap or a single gap can be the same. It's the
total gap spacing that performs this function.
There are of course efficiency issues with all gap styles and
construction, but that's a different topic.
Take care,
Bart
kingsandangels@xxxxxxxxxxx wrote:
> My twin spark gap is totally adjustable when running the Coil from left to right and around in circles and I can record it if you to show you, that when it is sometimes closer to the one side(Shorter spark gap)And away from the other side even to max power the way it fires is different from if it were say,The same distance from each leg to middle conductor at max(distance) power will most definately not fire at the same frequency.My guess is that if the first gap fires fast because the air is ironised quicker and the spark jumps though less conductive air but smaller gap,Then fast again into the center "Good" conductor then fires over a long distance again though less conductive air and alters the fire rate again and the frequency, then fast into the other leg of the gap thus I belive by firing twice, the the frequency changes twice.My Tesla Coil does not go above 10cm with one gap on my setup.
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