Search found 72 matches

by Ross Moffett
Thu Jan 16, 2014 5:54 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Feed through
Replies: 7
Views: 2836

Re: Feed through

The two close-mount connections were what concerns me as well. Judging by the thickness of the wire, it seems to me this is meant to power a filament or some other high-current element.
by Ross Moffett
Thu Jan 16, 2014 2:10 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Feed through
Replies: 7
Views: 2836

Re: Feed through

If you're on a shoestring budget, search for instructions for a DIY feedthrough. Cheaper, better.

These are made for high current, medium voltage. I don't think those are rated for over 1000V by looking at them.
by Ross Moffett
Mon Jan 13, 2014 4:00 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: First of my kind
Replies: 3
Views: 1776

Re: First of my kind

Search for the Make:Magazine fusor. It's a pictorial of a demo fusor that lots of people here have built.
by Ross Moffett
Mon Jan 13, 2014 3:59 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Power
Replies: 2
Views: 1571

Re: Power

You have a device which converts a medium voltage with a high current flow to a low voltage with a very high current flow. That's the opposite of where you want to start. This is the high voltage forum.

Welding arcs are a plasma. Not the same sort of phenomena that makes a fusor though.
by Ross Moffett
Tue Dec 24, 2013 2:53 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Could I use these for a demo fusor?
Replies: 1
Views: 1173

Re: Could I use these for a demo fusor?

I still strongly suggest a variac. It's a variable autotransformer. Since you need a variac anyway, you'd be hooking two autotransformers back-to-back unnecessarily. Variacs are available with taps so that you can automatically adjust to the correct voltage, or else you can simply not turn it up pas...
by Ross Moffett
Sun Dec 15, 2013 8:28 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Building A Transformer
Replies: 15
Views: 6117

Re: Building A Transformer

It's the driver, not the transformer, that's complicated with switched mode supplies of this nature. You can multiply the voltage from a NST, but the low frequency means that efficiency is not good. Your current output will be lower than that of a SMPS with caps of the same value. There are calculat...
by Ross Moffett
Sun Dec 08, 2013 3:36 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Building A Transformer
Replies: 15
Views: 6117

Re: Building A Transformer

High voltage switched mode transformer There's not a whole lot out there about making this kind of trafo. I happen to be over at my buddy's place in Austin to snap it for you. The blue stuff is Litz wire, a bundle of small gauge magnet wire designed to transfer high-amperage, high frequency AC curr...
by Ross Moffett
Fri Dec 06, 2013 3:22 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Power Supply - Regulate Output Via Reference Voltage
Replies: 3
Views: 1956

Re: Power Supply - Regulate Output Via Reference Voltage

Can you take pics of the inside?

Maybe not a good idea if you don't know about discharging capacitors.
by Ross Moffett
Mon Dec 02, 2013 5:31 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Building A Transformer
Replies: 15
Views: 6117

Re: Building A Transformer

Don't kid yourself.. age isn't getting in your way, you need to understand the electronics in order to design something like this though.

Buying something pre-made is always easy.
by Ross Moffett
Sun Dec 01, 2013 7:20 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Measuring Voltage on a Computer
Replies: 6
Views: 2685

Re: Measuring Voltage on a Computer

That can be made to work easily for a single data point, and with a bit more effort, for two. There are better/cheaper devices for data logging in my opinion, but in order to use those you'd need the kind of knowledge far beyond knowing only what they are. I turn to Arduino for most temporary breadb...