Re: MOT supply

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <A123X-at-aol-dot-com>

I'm probably going to go with an async rotary since I already have an angle
grinder and G-10 disk with proper holes in it. There's one thing I don't quite
understand, If the circuit works by storing up the energy from the first 1/2
cycle then releasing it with the second 1/2 cycle then shouldn't that put out
twice the power just half the amount time? 

Mark 


In a message dated 1/4/02 2:50:24 PM Eastern Standard Time, tesla-at-pupman-dot-com
writes: 


>
> Mark, 
>
> The low voltage, high current approach you are 
> contemplating is workable, but it's a tough way to go. 
> I also think .75uF is an unrealistically large tank 
> cap value. I'd shoot for something more in the .1-.2uF 
> range. 
>
> If I get a vote, I think the voltage doubler approach 
> would make your life simpler. With 8kvac to play with, 
> you could use a simple sucker gap and still get 
> adequate quenching. You could also use a more sensible 
> tank cap size. 
>
> Wattage doesn't change when you use the doubler. 
> Voltage goes up, but current goes down, so the overall 
> power stays roughly the same. What the half-wave 
> voltage doubler will do for you is "save up" energy 
> for half a cycle, then dump it all at once in the next 
> half cycle. For a glorious half-cycle, the TC tank 
> "feels" like it's getting twice the juice! (That's my 
> half-baked theory, anyway). During "dead time", when 
> the doubler caps are recharging, the TC tank is shut 
> down for a whole half-cycle. This interuption of the 
> current virtually eliminates the possibility of 
> runaway power arcing with any sensible spark gap. 
>
> My $0.02 
>
> Best Regards, 
>
> Greg 
> http://hot-streamer-dot-com/greg