Re: Re: Convert your MOT to NST?

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

Original poster: "G by way of Terry Fritz <twftesla-at-qwest-dot-net>" <bog-at-cinci.rr-dot-com>

Hi Ted,

I currently use an MOT doubler supply to power my coil. I have lost 
about 5 MOTs to internal secondary failure. They were all run under 
real xfmr oil. I haven't been able to figure out why this is 
occurring, but I can say the output of the doubler circuit will 
regularly jump my 3/4" ! (or better) safety gap. I had to set it wide 
because the power arcs were almost constant, and each one required a 
power-down. I just got annoyed and set it huge. But the MOTs are 
trash salvage so I'm not upset :).

I have yet to put money into nice test equipment so I cannot shed any 
more light on the subject.

Best,

Gregory
>This idea of running a MOT via a dimmer and cap is very intriguing.
>
>Presumably the MOT O/P waveform is not sinusoidal anymore (if it ever was)
>So we are trying to charge Cp with a fast spikey waveform I suspect.
>
>I imagine that this could be a problem (for many reasons) and look forward
>to reports from those of you with the gear set up to try this idea on a real
>tesla.
>
>Like others report I use MOTS under oil and believe it toughens them up.
>>From the list it seems that MOTS in oil rarely break down in Tesla service.
>Anybody experienced a problem in oil ??
>Rgds to all
>Ted Lionney in NZ