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Registered Member #3353
Joined: Sat Oct 23 2010, 11:21PM
Location: Greece
Posts: 90
Ok, but it still sound like a waste of the device... I do not think that you should be afraid of the voltage, my thyristors are meant to "switch" up to 1600V, and so they are verified to not leak any voltage to the case (heatsink) up at least that voltage. I assume yours are similar, so they must have at least 1KV "breakdown" voltage between pins and case. I am not 100% sure, but mine used to actualy rectify about 500 volts and the heatsink was connected to case of the machine (ground).
Anyway, here are some cool pictures of Greece (mine, no photoshop):
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
Killa-X wrote ... Been having some fun with Zen Magnets... (216 pack)
Those sure are fun. Could you use them for a little nuclear-fusion experiment (that belongs in a new thread)? 1. make up some "rings" of 3 balls and 5 balls. Odd numbers are less stable (higher energy) than even-numbered rings. 2. scatter the 3-ball rings (triangles) on a rug, and bombard them with 5-ball rings dropped from a foot or so above. Do you find that more than 50% of the time, the result is an 8-ball ring and not some other pattern?
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
Yeah it was a balloon satellite that was sent up as part of a class here at the University of Colorado. It's through the Colorado Space Grant Consortium. For the class, 10 groups each built an experiment into a small enclosure and sent it up to the edge of space. Pretty cool! If you want even more info about COSGC go here : spacegrant.colorado.edu
Registered Member #1408
Joined: Fri Mar 21 2008, 03:49PM
Location: Oracle, AZ
Posts: 679
Ken M. wrote ...
Then while cleaning the brush disaster....
One tiny little blip out of thousands of turns & the coil is clean except that one.....I can really empathize! My nephew wound one of the ugliest coils in history: overlap over overlap. But he was determined to see if he could just get it lit up. He coated it with paraffin and hot-melt glue (actually a clean job on that) and it worked fine. Virtually no corona and even though there was almost countless over-laps, it's performance was appropriate. It was simply a off-white tube. You might be able to tape off a "band" around that over-lap and coat that with hot-melt glue and paraffin in a small very clean band and it may not look all that bad. It would certainly work. In fact I doubt that if covered deeply enough with polyurethane, you may have not problem at all. But I DO understand the blemish issue, especially from a hand-wound coil: it's really annoying. A thin white band may not be all that nasty.
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