Search found 1506 matches

by Dennis P Brown
Mon Sep 17, 2018 8:51 pm
Forum: Images du Jour
Topic: Archived - Tom McCarthy's Fusor Efforts
Replies: 18
Views: 6171

Re: Archived - Tom McCarthy's Fusor Efforts

I certainly can't speak for your system but in mine, I could easily draw well over 100 ma at startup (max for my x-former was 33 kV and 28 ma continuous) using a 60 K-ohm oil submerged resistor. When the plasma first ignites, resistance can drop to near zero ohms in the fusor and the ballast resisto...
by Dennis P Brown
Fri Sep 14, 2018 10:38 am
Forum: Images du Jour
Topic: Fusor Reassembled
Replies: 3
Views: 442

Re: Fusor Reassembled

Very nice. Look forward to you posting progress pics and write ups on results.
by Dennis P Brown
Fri Sep 14, 2018 10:37 am
Forum: Please Introduce Yourself
Topic: Greetings from Essex
Replies: 1
Views: 234

Re: Greetings from Essex

Hello, and look forward to your inputs
by Dennis P Brown
Thu Sep 13, 2018 5:33 pm
Forum: New User Chat Area
Topic: Using a neon sign transformer for fusion
Replies: 5
Views: 632

Re: Using a neon sign transformer for fusion

I think you mis-understand the point Richard is making. The issue is detection of neutrons and the proof that one has detected them. Voltage and current as well as cathode design are secondary issues. Yes, 10 kV can do it IF one has the complex and proven detector system. If one wants to use ready a...
by Dennis P Brown
Thu Sep 13, 2018 10:02 am
Forum: New User Chat Area
Topic: Questions on refilling Hydrogen tank
Replies: 4
Views: 507

Re: Questions on refilling Hydrogen tank

Depends on how pure you want the gas in the tank and what contaminates are more or less acceptable (assuming worse case and the new empty tank has some air.) While a a turbo will easily get you to bottom out 10^-6 torr or better (likely) the issue is water being on the walls from the possible air ex...
by Dennis P Brown
Wed Sep 12, 2018 9:19 pm
Forum: Fusion --- Past, Present, and Future
Topic: Meditation on fusion
Replies: 3
Views: 500

Re: Meditation on fusion

Fusion is the fundamental source of all energy used in the universe - even uranium (the stored energy Richard mentioned.) But that element is mostly created during the fusion by 'neutron rich' materials (found in neutron stars) that is created after two neutron stars collide to form a black hole; th...
by Dennis P Brown
Wed Sep 12, 2018 8:59 pm
Forum: Images du Jour
Topic: My first plasma
Replies: 12
Views: 978

Re: My first plasma

The best course to take is throw away that glass chamber, buy a low cost Stainless Steel (SS) four way cross (50 mm dia.) and make that your chamber. Installing a decent window (1 cm thick glass) and a high voltage feed thru is very easy - that leaves a place to add a vacuum exhaust and gas feed lin...
by Dennis P Brown
Tue Sep 11, 2018 10:45 am
Forum: Images du Jour
Topic: My first plasma
Replies: 12
Views: 978

Re: My first plasma

I agree with Richard, the glass chamber is just too dangerous to use if one is driving the plasma enough to get those results. I would never allow that to occur in my chamber against my window - it is a disaster in the making. As for fusion, you had better build a proper metal chamber because a glas...
by Dennis P Brown
Tue Sep 11, 2018 10:09 am
Forum: New User Chat Area
Topic: Power Source Voltage Ripple Regulation
Replies: 2
Views: 238

Re: Power Source Voltage Ripple Regulation

Someone did, if I recall, not too long ago try one of these exact units and they haven't posted since. There may be issues that cause problems - placing the unit under oil can't hurt but you might consider placing the unit under vacuum first, then adding oil so there is no trapped air within the cor...
by Dennis P Brown
Fri Sep 07, 2018 7:08 pm
Forum: New User Chat Area
Topic: What kind of power supply do I need?
Replies: 2
Views: 321

Re: What kind of power supply do I need?

Reversing a step down transformer has issues - the wiring insulation is no where near rated for such high voltage. There are methods to address this but with a neon sign transformer (NST) being fairly cheap, and fairly safe, a NST would for a new person tend to make a better project (but, of course,...