Re: Secondary winding frustration

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

Original poster: Bart Anderson <classi6-at-classictesla-dot-com> 

Maybe they could:
If they charged a large 3uF cap up for single shot mode (that may take some 
time) and used a very large terminal. I just modeled the coil with an 
18"x40" toroid.

15.77 [kHz] = Secondary Resonant Frequency
175 = Turns Per inch
0.00322 [inch] = Space Between Turns (edge to edge)
24455.71 [ohms] = DC Resistance
185714 [ohms] = Reactance at Resonance
1874.275 [mH] = Les-Effective Series Inductance
1890.326 [mH] = Lee-Equivalent Energy Inductance
1872.477 [mH] = Ldc-Low Frequency Inductance
54.343 [pF] = Ces-Effective Shunt Capacitance
53.321 [pF] = Cee-Equivalent Energy Capacitance
75.338 [pF] = Cdc-Low Frequency Capacitance
20.692 [mils] = Skin Depth <---------------- note, very lossy for 42g wire
21210 [volts] = Charging Voltage
21198 [volts] = Arc Voltage
674.8 [joules] = Primary Cap Energy
6308.9 [amps] = Primary Instantaneous Current < ---- Ouch!
99.9 [%] = Percent Cap Charged at Gap Conduction
1 [BPS] = Breaks Per Second
674 [joules] = Effective Cap Energy <---- Ouch!
5028017 [volts] = Terminal Voltage <---- There you go!
63.7 [inch] = Spark Length

But, what type of primary, cap, and sparkgap must be built to handle this 
kind of power? I guess the real question is, what was left of the coil 
following discharge?

Take care,
Bart

Tesla list wrote:

>Original poster: "RIAA/MPAA's Worst Nightmare" <mike.marcum-at-zoomtown-dot-com>
>I read somewhere a few years ago on the TCBA newsletter (I think) about a
>team of coilers (pro physisicts? can't remember) that made an 8"x40"
>secondary with ~7000 turns of 42 awg. They managed still to get 5 million
>volts out of it with if I remember right a 15/120 supply. I take it that
>higher voltage doesn't necessarily mean longer spark, but am I overlooking
>something else? I don't think they mentioned the output length, but 5MV is
>hard to picture short.
>  What if I keep the primary inductance high and add a bigger topload? This
>was my original idea, but was thinking that adding a breakout point reduces
>the effective capacitance, or does it do the equivelent of making it a big
>leakier capacitor? Can't test this without my scope and kinda chicken to try
>since it's not a robust tube unit.