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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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