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Dead Spellman PTV50N200 - where to start?

... of op-amps so I could drive a meter. I had not yet attached it to my vacuum system due to lack of an adequate feedthrough and because to ensure safety (and to fit it on my bench) I needed some careful grounding, etc arrangement -- and ...
by ian_krase
Wed Aug 02, 2017 8:30 am
 
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Dead Spellman PTV50N200 - where to start?
Replies: 7
Views: 150

Re: Greetings!

... in the fusor power section (High voltage section.) Also, one uses a vacuum to get a x-former transformer (really within its winding's) to fill ... proof.) Calculating the stopping thickness of slate for a 80 keV X-ray (safety factor!) is trivial (called google.) Slate can be drilled so bolting ...
by Dennis P Brown
Thu Jun 29, 2017 10:03 am
 
Forum: Please Introduce Yourself
Topic: Greetings!
Replies: 16
Views: 729

Re: Leybold D8C, a question

From both a safety and practicality standard point, best to drain and replace the oil. You have no idea ... is appropriate! When changing the oil, use gloves, and dispose of the oil properly (vacuum pump oil can be taken to any place that handles used motor oil.) Follow standard ...
by Dennis P Brown
Fri Jun 16, 2017 10:48 am
 
Forum: Vacuum Technology (& FAQs)
Topic: Leybold D8C, a question
Replies: 3
Views: 194

Re: First plasma

Yeah, I imagine you now see why safety shields and/or protection film are so important, especially when applying vacuum for the first time. Most successful large glass elements are either hollow (tubes, cylinders, bell ...
by ian_krase
Mon Jun 12, 2017 3:31 am
 
Forum: Fusor Construction & Operation (& FAQs)
Topic: First plasma
Replies: 4
Views: 363

Deuterium Accelerator

Since I have been running my fusor vacuum system (no deuterium) every week or so (to high vac) to keep it clean, I decided ... with the fact that I haven't tested/measured any flux yet creates too many safety unknowns (I do have an anti-electron back flow system incorporated at the water ...
by Dennis P Brown
Mon May 22, 2017 11:08 am
 
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Deuterium Accelerator
Replies: 0
Views: 294

Re: Robert Dwyer Fusor Progress

Thank you for your reply Dennis. In regards to the vacuum pump, it is a two stage unit, that I measured 9 microns as an ultimate ... reconsider the DIY approach to the feedthrough. As for grounding, I agree, safety is of the upmost importance with this project. A metal cage is in the plan, ...
by Robert Dwyer
Mon May 08, 2017 6:19 pm
 
Forum: Fusor Construction & Operation (& FAQs)
Topic: Robert Dwyer Fusor Progress
Replies: 7
Views: 721

Thin-Walled Acrylic Demo Fusor

... had my doubts about 5mm thick acrylic being able to hold the walls in a vacuum, and had extra implosion shielding just in case. Surprisingly, it ... cheap vacuum chamber setups :) Of course, this is bordering on the safety of vacuum chamber design. I wouldn't advise to go any lower in wall ...
by Samuel Low
Thu Mar 30, 2017 2:56 pm
 
Forum: Images du Jour
Topic: Thin-Walled Acrylic Demo Fusor
Replies: 3
Views: 525

Re: John Beutz Fusor... The Story so Far

... - your pump is very small (volume pumping capabilities, not ultimate vacuum) and that could be an issue that bites you. That said, as long as ... before ever applying voltage to that 100 kV x-former; first, for safety reasons but also, if you burn out that x-former, or design/install ...
by Dennis P Brown
Sun Mar 19, 2017 6:10 pm
 
Forum: Images du Jour
Topic: John Beutz Fusor... The Story so Far
Replies: 24
Views: 2160

Re: John Beutz Fusor... The Story so Far

I posted a great deal on your vacuum issues and you now know what to do to get in the micron range with that system ... are rare and expensive. One does not want to blow those so care is not just about safety. Cables and connectors are extremely hard to find and new ones are extremely ...
by Dennis P Brown
Sat Mar 18, 2017 5:01 pm
 
Forum: Images du Jour
Topic: John Beutz Fusor... The Story so Far
Replies: 24
Views: 2160

Re: Mech Pump and Transformer Questions

... a straight metal tube that has a KF fitting on its end (that type of vacuum tube is a good idea for that DP and removes the need for welding to ... design/system when the x-former was hot. Speaking of fusor electrical safety, your list should include confirming that you have a good ground point ...
by Dennis P Brown
Sat Mar 18, 2017 3:22 pm
 
Forum: New User Chat Area
Topic: Mech Pump and Transformer Questions
Replies: 20
Views: 1170
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