RE: my power supply was: pt-coil caps/too many?

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

Original poster: "Michael S" <me-at-vduo-dot-com> 

This might be a little off-topic, but is there anywhere I can find the
equations for those calculations?  (Seems like I might be able to use
some differential equations to optimize the outputs)

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, December 09, 2003 10:18 PM
To: tesla-at-pupman-dot-com
Subject: Re: my power supply was: pt-coil caps/too many?

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

Hi Adam,

Tesla list wrote:

 >Original poster: Beans45601-at-aol-dot-com
 > >
 > > On my new coil, my secondary will be a 10" sonotube, wrapped
 > > 1440 times
 > > with 20 gauge wire (50 inches of turns). The spark gap is a
 > > 3450 RPM. 6"
 > > disc with 8 flying electrodes. MY toroid is a 9X30 spun toroid and
my
 > > primary will be 12" inner diameter, with 18 turns. The cap
 > > bank will be 5
 > > strings of 16 geek group caps, for a total of .0458UF. Is
 > > this too much
 > > capacitance? If not, what would be considered too much, with
 > > the coil I am
 > > building?
 >
 >i will be running it with a 14.4 KV 1.5KVA PT.
 >
 >Will this be enough?

The supply is small for a 10" coil and .0458uF cap size. More below to
follow.

(extracted a portion of Javatc output)
----------------------------------------------------
Rotary Spark Gap Inputs:
1 = Number of Stationary Gaps
8 = Number of Rotating Electrodes
3450 [rpm] = Disc RPM
0.25 = Rotating Electrode Diameter
0.25 = Stationary Electrode Diameter
6 = Rotating Path Diameter

----------------------------------------------------
Rotary Spark Gap Outputs (noting ***):
8 = Presentations Per Revolution
460 [BPS] = Breaks Per Second
61.6 [mph] = Rotational Speed
2.17 [ms] = RSG Firing Rate
31.659 [ms] = Time for Capacitor to Fully Charge
0.34 = Time Constant at Gap Conduction
0.46 [ms] = Electrode Mechanical Dwell Time
29.06 [%] = Percent Cap Charged at Gap Conduction ***
5917 [volts] = Effective Cap Voltage ***
0.8 [joules] = Effective Cap Energy ***
175258 [volts] = Terminal Voltage ***
369 [joule*seconds] = Cap Energy per Second ***
60.3 [inch] = RSG Spark Length ***

----------------------------------------------------
Now, if we drop the tank capacitance down to .02uF:

8 = Presentations Per Revolution
460 [BPS] = Breaks Per Second
61.6 [mph] = Rotational Speed
2.17 [ms] = RSG Firing Rate
13.825 [ms] = Time for Capacitor to Fully Charge
0.79 = Time Constant at Gap Conduction
0.46 [ms] = Electrode Mechanical Dwell Time
54.44 [%] = Percent Cap Charged at Gap Conduction ***
11086 [volts] = Effective Cap Voltage ***
1.23 [joules] = Effective Cap Energy ***
216979 [volts] = Terminal Voltage ***
565 [joule*seconds] = Cap Energy per Second ***
65.4 [inch] = RSG Spark Length ***

----------------------------------------------------
Ok, let's drop BPS using only 4 rotating electrodes (noting ***):

4 = Presentations Per Revolution
230 [BPS] = Breaks Per Second ***
61.6 [mph] = Rotational Speed
4.35 [ms] = RSG Firing Rate
13.825 [ms] = Time for Capacitor to Fully Charge
1.57 = Time Constant at Gap Conduction
0.46 [ms] = Electrode Mechanical Dwell Time
79.25 [%] = Percent Cap Charged at Gap Conduction ***
16136 [volts] = Effective Cap Voltage ***
2.6 [joules] = Effective Cap Energy ***
315826 [volts] = Terminal Voltage ***
599 [joule*seconds] = Cap Energy per Second ***
66.2 [inch] = RSG Spark Length ***

----------------------------------------------------
Finally, let's drop BPS using 2 rotating electrodes (noting ***):

2 = Presentations Per Revolution
115 [BPS] = Breaks Per Second
61.6 [mph] = Rotational Speed
8.7 [ms] = RSG Firing Rate
13.825 [ms] = Time for Capacitor to Fully Charge
3.14 = Time Constant at Gap Conduction
0.46 [ms] = Electrode Mechanical Dwell Time
95.69 [%] = Percent Cap Charged at Gap Conduction ***
19485 [volts] = Effective Cap Voltage ***
3.8 [joules] = Effective Cap Energy ***
381370 [volts] = Terminal Voltage ***
437 [joule*seconds] = Cap Energy per Second ***
62.2 [inch] = RSG Spark Length ***

I din't "optimize" anything here, just showing some relationships with
energy throughput which you may want to consider. Once you define or
optimize what you think is a good setup, then just build a primary to
suit
the complete resonator. Also note, the .0485uF cap will work (as long as

the rotary gap is set narrow).

Hope this helps a little.
Take care,
Bart