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RE: [TCML] further help with dual mot



The breaker on my power grid thing flips if I pull a continuous arc for over 5 seconds. Will this not happen when I run the coil or the gap?

> Date: Sun, 4 Sep 2011 16:27:11 -0400
> From: sdbogard@xxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] further help with dual mot
> 
> Hi James,
>       Firstly if you are only using two MOTs you don't need a ballast at 
> all for maximum power, they draw just enough to not flip breakers for 
> short runs.  Secondly the standard ballast for two MOTs is one MOT, with 
> the secondary shorted.  You basically use the primary as a resistor, 
> that way the inductance limits your current, no matter how many MOTs you 
> have down wind, to that of a single MOT or around one kilowatt.  Lastly, 
> Yes, you can use a resistor, but good luck finding one that will handle 
> the heat dissipation (remember power = current squared times 
> resistance.)  You are going to want at least a thousand watts, any less 
> and there is no point at all in using MOTs.  As for 8 ohms, lets see. 
> 1000 = I^2*8, so 1000/8=I^2, so 125=I^2, so I=11Amps, so yes, you can 
> use an 8 Ohm resistor.  You might need to make a salt water resistor, 
> that is the only economical resistor I can think of for that heat 
> dissipation, and I'm not sure you can tritate it for an exact value like 
> 8 ohms.  In the end I'd use an inductive ballast, or no ballast, and 
> just let the coil draw what it wants, smoothest operation that way, and 
> the only way you can expect to get really big sparks out of 2 MOTs...
> 
> On 9/4/2011 12:28 PM, James Hutton wrote:
> > If I were to use a resistive ballast, would an 8 ohm resistor work?I am going off rishie burnett's site: http://www.richieburnett.co.uk/ballast.html#ballastingLV current = LV supply voltage / Ballast resistance.15 = 120/8
> >
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