Search found 19 matches

by gary_f
Mon Aug 25, 2008 11:43 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: voltage, current, pressure and temperature
Replies: 9
Views: 3068

Re: voltage, current, pressure and temperature

<r>Thanks everyone! It's pretty clear now that I have more cleaning to do. I also see that nudging up from below is better than forcing from the top. As Richard put it, a feeling for conditions at "the edge" is starting to sink in. <br/> <br/> Dave, I'm using a ballast resistor, but I should probabl...
by gary_f
Mon Aug 25, 2008 4:43 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: voltage, current, pressure and temperature
Replies: 9
Views: 3068

Re: voltage, current, pressure and temperature

<t>That's the advice I was looking for, thanks. I'll try glow cleaning for awhile. A few weeks ago, I was working with a smaller chamber and had a 2 stage metering valve I used to control the pressure (and I didn't have this trouble). When I went to a larger chamber, I left out the metering valve, t...
by gary_f
Sun Aug 24, 2008 5:04 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: voltage, current, pressure and temperature
Replies: 9
Views: 3068

voltage, current, pressure and temperature

<t>Since my last post a few months ago as a "noobie", I've assembled a demo device and spent some time exploring the relationship between voltage, current, pressure, and "glow". (This is an addictive pastime!). I'm puzzled about what I see and I'm not sure whether it's common to all fusors or to som...
by gary_f
Wed Jun 25, 2008 11:24 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Noobie questions
Replies: 14
Views: 4349

Re: Noobie questions

<t>Richard, thanks for the memories! I remember doing some experiments with explosives in those days -- until my mother tipped off the pharmacist who was selling me a few chemicals. He thought I was doing biology with them.<br/> <br/> I never got into rocketry but I remember dreaming over some Estes...
by gary_f
Tue Jun 24, 2008 7:07 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Noobie questions
Replies: 14
Views: 4349

Re: Noobie questions

Richard
Given your history with tesla coils, this may be of interest:

A picture of myself in 1966, proudly displaying the 1st place trophy for my tesla coil project.

Fourty two years later, one of the projects I judged at this years Intel fair was another tesla coil.
by gary_f
Mon Jun 23, 2008 11:52 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Noobie questions
Replies: 14
Views: 4349

Re: Noobie questions

<t>Michael Li won his big award at the Science Talent Search, not the Intel Science Fair. Here are the fusor awards for the last seven years at ISEF:<br/> 2007 Thiago Olsen "Neutron Activation Using an IECFR"<br/> 2003 Craig Wallace, "Nuclear Fusion Reactor Apparatus"<br/> 2003 Michael Li, "Measurem...
by gary_f
Sun Jun 22, 2008 4:59 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Noobie questions
Replies: 14
Views: 4349

Re: Noobie questions

<t>Thank you all for your thoughts. My motivation is to teach my son some physics and possibly enable him with equipment for a science fair project. What I have in mind is a demo fusor made as cheaply as possible. A bell jar would be fine, a fruit jar would be even better. (At science fairs the "ind...
by gary_f
Fri Jun 20, 2008 4:34 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Noobie questions
Replies: 14
Views: 4349

Re: Noobie questions

<t>Thanks for the replies, guys. On the spectra, I guess I was thinking you would flush it with D2 once or twice between pumpdowns to get rid of 99.999% of the original air. I guess you might have to run it a long time before the helium spectral lines showed up. It was just a thought.<br/> <br/> On ...
by gary_f
Thu Jun 19, 2008 11:39 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Noobie questions
Replies: 14
Views: 4349

Noobie questions

<r>I'm accumulating equipment for this (haven't tried anything yet). I've read a lot of the posts here, but I still have a few foolish questions: <br/> <br/> 1. Will the standard fusor design scale down? Is there some parameter that dictates a minimum size? Reasons for scaling down are cost, quicker...