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Re: [TCML] MOT shunts
Hi Dan,
> Subject: [TCML] MOT shunts
>
>
> > Re MOT's, will removing the shunts increase the output
> voltage as well as allowing more output current? The
I don't know. I've knocked the shunts out of a MOT or two, but I never bothered with before & after measurements. I understand why you want more voltage, but why do you want more current? MOTs provide more than enough current already.
> units I have will saturate the cores at about 85 volts, and
> increasing the primary input merely increases the power
> consumption while the output voltage ceases to
> increase. Aside from possibly more heating, what is
> the downside of driving a TC with lower voltage plus higher
You'll need a narrow gap with aggressive cooling to deal with the low voltage, high current power supply. I've gotten good results with an all-copper sucker gap mounted on an old vacuum cleaner motor--very noisy, but cheap & effective. Other MOT coilers have gotten good results using asynchronous rotary spark gaps.
You'll also need a bigger tank capacitor. A 15/30 NST needs a tank cap of only 5 to 10nF. With a twin MOT 12KVDC supply, I use 50nF.
> current. I killed my 15 kv/30ma even with a Terry
> Filter in place, and can't afford $250 for a new one!
Yes, even used NSTs can get spendy due to the high shipping cost. Likewise, most e-bayers don't know how to pack NSTs properly, and they often arrive with broken HV bushings. Over the past 10 years or so, I've accumulated roughly 35 MOTs--all for free. There's something very liberating about using free junk to build an effective power supply. This is my latest effort:
http://myweb.cableone.net/grcarhunter/stimulus_MOT.html
Best spark so far is 50" from my 4.5" x 24" coil to a garage door rail.
> Thank you Dan
> >
Doing it without NSTs in MS,
Greg
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