[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Safety gap issues

Original poster: "JT Bowles" <jasotb@xxxxxxxxxxx>

how can the sparkgap voltage be higher than your transformer output
     (especially DOUBLE)

you want me to use 15,000 volts as the firing voltage?
Then, the equation tells me 220KV output voltage. I am happy with that.

I KNOW I AM BEING AN A**, BUT I WANT TO BE REALLY SURE. CAN YOU DO IT FOR ME?

*8mm spark gap(3 gaps, 4 Cu tube series)(15KV we'll say?)
*secondary Cself + tolpoad IS 18.62 pF
*primary capacitor is 7.8nF
*I come up with 220KV, what do you come up with?

awaiting your response to my millionth question,
JT Bowles



From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: Safety gap issues
Date: Sun, 27 Nov 2005 19:19:36 -0700

Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 04:45 PM 11/27/2005, you wrote:

Original poster: "JT Bowles" <jasotb@xxxxxxxxxxx>

YOU SAID:
"A very good equation that works well to find a coils peak output voltage is:

Vt = Vf x SQRT (Cp / (2 x Cs))

Where:

Vt it the peak top voltage
Vf is the spark gap firing voltage
Cp is the primary capacitance
Cs is the effective secondary capacitance
SQRT square root function "
* if i know the distance, can you tell me the sparkgap firing voltage? it is 7.5 to 8 mm, at 30MA. 8000v? 
* primary capacitance? you mean just the capacitor? 7.8nF (.0078 uF)
* secondary capacitance, with toroid, is 18.6 pF (.0000186 uF)

wtf? that means my coil only makes 117.3KV!!!!?   Cant be true. I wont buy it
8mm * 3 kV/mm for an ideal gap is 24kV.. probably more like 12-15 kV for yours.. 

18.5 pF is secondary self C + topload?

117.3kV is perfectly reasonable...
why complain?