Search found 1423 matches

by Dennis P Brown
Wed Apr 25, 2018 12:43 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Reactor Update - 4/22/18
Replies: 2
Views: 199

Re: Reactor Update - 4/22/18

Very professional upgrades and setup; as a safety note: does the metal frames have proper independent grounds - also, did you ohm all equipment to grounds to verify that all have good connections? I, however, like a redundant ground for the main chamber - if that were ever to float, an extreme dange...
by Dennis P Brown
Sun Apr 22, 2018 7:09 pm
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Stellarator Progress
Replies: 0
Views: 115

Stellarator Progress

The German stellarator has been very successful - so much so, they upgraded the device. An excellent article can be read here: https://phys.org/news/2017-09-wendelstein-x-experimentation.html As some of you may recall, my daughter Jeannette worked the summer on that device in Germany (solving an iss...
by Dennis P Brown
Mon Mar 26, 2018 2:18 pm
Forum: Images du Jour
Topic: Arc polarity for fusing wire?
Replies: 11
Views: 1137

Re: Arc polarity for fusing wire?

A word of caution - both those devices - especially the Xenon lamp- put out a lot of UV. Use good eye wear like a welder's mask (short blue and UV is also bad for the skin.)
by Dennis P Brown
Mon Mar 26, 2018 2:08 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Robert Dwyer Fusor Progress
Replies: 37
Views: 4425

Re: Robert Dwyer Fusor Progress

Robert, your results have been excellent and you should be proud of your success. I also understand taking time off - I too am out of the game now (my very nice borrowed x-former needed to be returned to its owner (yes, they don't want to sell it to me and have a project they want to use it for.)) I...
by Dennis P Brown
Tue Feb 13, 2018 10:59 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High Voltage Ballast Resistor and Inner Grid Help
Replies: 4
Views: 357

Re: High Voltage Ballast Resistor and Inner Grid Help

Yes to referencing the grid, and I should have said tungsten - good catch.
by Dennis P Brown
Mon Feb 12, 2018 6:42 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High Voltage Ballast Resistor and Inner Grid Help
Replies: 4
Views: 357

Re: High Voltage Ballast Resistor and Inner Grid Help

I got a fusor grade 300 watt wire wound ceramic resistor on e-bay. If one searches often, a usable unit often appears - don't be too specific and get a large number of hits to look over. Remember, they can be put in oil to improve their cooling so a lower wattage resistor can be then made acceptable...
by Dennis P Brown
Sat Feb 10, 2018 12:36 pm
Forum: Please Introduce Yourself
Topic: Hello from Ohio
Replies: 1
Views: 266

Re: Hello from Ohio

Welcome. Do read the information sections on the required components that any real fusor requires. Without proper knowledge of all the detailed parts/assemblies needed by a fusor, one is wasting their money and time trying to collect useless (maybe) parts or building devices that will not work for f...
by Dennis P Brown
Sat Feb 10, 2018 12:09 pm
Forum: Vacuum Technology (& FAQs)
Topic: Removing Turbo Pump Rotor
Replies: 7
Views: 561

Re: Removing Turbo Pump Rotor

If you think it is "gummed up" then try cleaning it. Acetone is often recommended for some turbo's. Then a rinse with absolute (or close) alcohol. If it is the upper "floating" bearing, then you are done. If it is a lower bearing, then one needs turbo pump bearing oil to re-lubricate the bearing. Do...
by Dennis P Brown
Sat Feb 10, 2018 12:01 pm
Forum: New User Chat Area
Topic: Seeking Advice
Replies: 3
Views: 539

Re: Seeking Advice

Achieving fusion is not easy and cannot be done cheaply unless one can really use ebay so they get very good deals (i.e. catch items others miss and/or can fix stuff others won't buy because the items don't work), and one can basically build very complex electronics themselves - detecting neutrons i...
by Dennis P Brown
Thu Feb 08, 2018 1:13 pm
Forum: Vacuum Technology (& FAQs)
Topic: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System
Replies: 35
Views: 1977

Re: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System

When you say: Additional high and ultra-high vacuum pumps can also be employed, such as ion pumps and titanium sublimation pumps with relative ease and low cost These are very expensive items new, and not very easy to obtained used; and more often, not in the best condition when used (especially the...