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Registered Member #611
Joined: Wed Mar 28 2007, 11:40PM
Location: Hudsonville, Michigan
Posts: 79
Dr. Kilovolt wrote ...
BTW where did you get such a number of microwave caps? I'm jealouos
I scrounged around Freecycle, Craig's list, the scrapyard, garage sales, etc. I got 30 microwaves over a 6 month period. I payed no more than 5 bucks and most where free. I spent maybe $30 or $40 total.
... wrote ...
The using coolers for hv enclosures is certinly a unique idea, although I wouldn't recomend it since the thermal properties of coolers are horrible (remember they can also be used to keep hot food hot). You might even be able to keep your mots running longer if the oil bath they are in had better cooling.
I had them in an ammo can. The connections to the insulators arced over to the case. It was loud and made a burnt pvc and carbon mess in the oil, so I decided to try the cooler.
Each failure was a learning experience. The design improved with each time I had to rewire. I really thought this was the one. Oh well, I'll just rebuild it and this time I won't put it to this kind of punishment. My original 4 stack ran at up to 3KVA on my Tesla coil for 6 months, without oil, without any trouble. As soon as I hooked up the resonant capacitor, it fried.
Registered Member #1438
Joined: Sat Apr 12 2008, 12:57AM
Location: Canada
Posts: 218
Kristian wrote ...
Dr. Kilovolt wrote ...
BTW where did you get such a number of microwave caps? I'm jealouos
I scrounged around Freecycle, Craig's list, the scrapyard, garage sales, etc. I got 30 microwaves over a 6 month period. I payed no more than 5 bucks and most where free. I spent maybe $30 or $40 total.
... wrote ...
The using coolers for hv enclosures is certinly a unique idea, although I wouldn't recomend it since the thermal properties of coolers are horrible (remember they can also be used to keep hot food hot). You might even be able to keep your mots running longer if the oil bath they are in had better cooling.
I had them in an ammo can. The connections to the insulators arced over to the case. It was loud and made a burnt pvc and carbon mess in the oil, so I decided to try the cooler.
Each failure was a learning experience. The design improved with each time I had to rewire. I really thought this was the one. Oh well, I'll just rebuild it and this time I won't put it to this kind of punishment. My original 4 stack ran at up to 3KVA on my Tesla coil for 6 months, without oil, without any trouble. As soon as I hooked up the resonant capacitor, it fried.
Oh man 30 microwave? Each Microwave probably takes me a 30 minutes period to dissect them and take the MOT and MOC.
Registered Member #1526
Joined: Mon Jun 09 2008, 12:56AM
Location: UK
Posts: 216
I just remember my 2-mot resonant setup was optimum with 1uf. On my scavenging expeditions I`ve discovered that powerful commercial type microwaves often use a full wave doubler which is nice when you`re hoarding capacitors. I`ve also found that nearly every restaurant seems to have one or two in the back yard :o)
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Resonant MOT arcs
