Search found 1451 matches

by Dennis P Brown
Fri Jun 22, 2018 11:52 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Ballast resistor construction
Replies: 9
Views: 298

Re: Ballast resistor construction

I have normal (semi-sharp) edges on my ballast but it is under oil, and has not been an issue for up to 33 kV. I have used drops of silicon sealant for that purpose when the device was first operated in air with success but again, 33 kV is not 40 kV (Nor the issues of rms.) A transformer core does n...
by Dennis P Brown
Fri Jun 22, 2018 12:26 pm
Forum: Images du Jour
Topic: Fusor Progress, Luke Harrill
Replies: 1
Views: 119

Re: Fusor Progress, Luke Harrill

Activation is not generally a good approach for a first time fusor attempt. The very least you will need a good x-ray transformer capable of creating the high rate of neutrons - that is, a high voltage and current device (see FAQ's on the exact levels most use for activation.) Considering the money ...
by Dennis P Brown
Fri Jun 22, 2018 12:17 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Ballast resistor construction
Replies: 9
Views: 298

Re: Ballast resistor construction

Like Richard's, my ballast resistor is under oil (simple synthetic motor oil - superior to even most x-former oils.) Besides the complete elimination of corona issues, it provides excellent cooling.
by Dennis P Brown
Wed Jun 20, 2018 1:10 pm
Forum: Images du Jour
Topic: Muhammad Faidzul Demo Fusor
Replies: 15
Views: 2911

Re: Muhammad Faidzul Demo Fusor

Do not rule out local sources. Sometimes local places have equipment that they need to get rid of - refrigeration companies. They throw out small tanks that could be converted into a chamber with some cutting and welding; also, they might have an old vacuum pump they'd sell cheap. Of course, univers...
by Dennis P Brown
Wed Jun 20, 2018 1:01 pm
Forum: Please Introduce Yourself
Topic: Me
Replies: 3
Views: 337

Re: Me

The best place to start for information are the FAQ's for each sub-category. There is a wealth of basic information to even expert level.
by Dennis P Brown
Mon Jun 11, 2018 12:43 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Does this look sufficient for a proof of concept fusor?
Replies: 7
Views: 1057

Re: Does this look sufficient for a proof of concept fusor?

Besides a base, you will need some type of gasket to form a 'soft' seal to the edge of your bell jar. That is critical for both a proper seal for vacuum and for safety. Cutting a ring of rubber like material to match the edge of your bell jar is rather easy. A simple base would be a large enough pie...
by Dennis P Brown
Wed Jun 06, 2018 1:59 pm
Forum: Please Introduce Yourself
Topic: Hello from Texas!
Replies: 2
Views: 390

Re: Hello from Texas!

Welcome. Richard, our primary poster has extensive Tesla coil experience among his many, many skills/knowledge. Best luck with your site and work.
by Dennis P Brown
Wed Jun 06, 2018 1:44 pm
Forum: New User Chat Area
Topic: Second Opinion on XRT
Replies: 5
Views: 632

Re: Second Opinion on XRT

Wow, that is really nice. I agree it is a steal at that price. Richard is correct, proper shielding is essential once you start operation.
by Dennis P Brown
Sun Jun 03, 2018 10:08 am
Forum: New User Chat Area
Topic: Professors near me?
Replies: 2
Views: 328

Re: Professors near me?

Glad to hear your interested in fusors. This is the place to start. Next, you need to read the FAQ's in the various areas offered here and get a good idea of what a fusor is, what parts there are, how they are assembled, and finally, rough ideas on the construction/operation. After that, one is read...
by Dennis P Brown
Wed May 30, 2018 10:23 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Detector noise problem
Replies: 13
Views: 1728

Re: Detector noise problem

In your low band pass filter circuit, what are the values of those resistors: Ohms, kilo-ohms or mega-ohms?