Fusor Forums

<t>I have had cheap digital meters do exactly what you describe, and more expensive meters work great. I think it really just comes down to the quality of the meter. An analog is almost sure to work, though.<br/> <br/> I started using my scope as a volt meter which I really like, I will probably nev...

<t>My chamber was a combination of CF and KF. CF on the large hemisphere (pretty much the only option there, assuming you're going for the standard spherical chamber). I have one CF2.75 for the feedthrough since almost all surplus feedthroughs you find appropriate for fusors will be CF. I have KF on...

<t>If the primary has a fully floating 24940 (not case-center-tapped) then yes, because you can put 120Vac on the "secondary" (now a primary) and rectify the 24940 winding, you'll get 35165Vdc_peak. If it is center tapped case grounded, then it's not so useful unless you put a multiplier on it (whic...

I've run up to 1.8kV for my he3 supply through many BNC cables, several of very low quality, and have never once had an arc over issue. Maybe I'm just incredibly lucky, but I've always disregarded the suggested voltages that in my experience seem absurdly low.

<t>It really depends where you are. Here at MIT I can basically get anything, everything is thrown away. There is no sales of old equipment, not worth the time. There are large electronics and lab dump sites that are accessible to students and we can take whatever we want day or night. On top of tha...

Just a warning that I discovered through accident, anything made of a soft metal threaded on near the grid will permanently weld onto the threading. In my case that was aluminum. Copper would likely do alright, at least better than aluminum.

If it says that, it should be fine through vertical. All the turbo's I have worked with have been installed upside-down and haven't had troubles (of course it was confirmed with the manual that any orientation is acceptable before doing so)

<r>I was playing around in Poission Superfish and came up with a geometry that I thought should steer ions to avoid grid wires. Apparently this idea has come up before, also (Steven pointed me to this old discussions: <URL url="http://www.fusor.net/board/viewtopic.php?f=14&t=6580#p44586"><LINK_T...

<t>I don't think those are x-rays, they look like little discharges off of sharp parts of your grid and chamber, which happen a lot when conditioning a new grid at higher voltages.<br/> <br/> X-ray dots are different in two ways. One, they are distinct single pixel spots, sometimes maybe a few pixel...

<t>You shouldn't use those because they are water based, and water is bad on vacuum equipment. You want to use a solvent such as acetone or ethanol. What usually works well is to get the bulk of the cleaning done with acetone, then finish off with ethanol which leaves no coating upon evaporation unl...