Search found 395 matches

by ian_krase
Sun Feb 18, 2018 7:26 pm
Forum: Vacuum Technology (& FAQs)
Topic: Ion Gauge Controller
Replies: 2
Views: 47

Re: Ion Gauge Controller

I use one, and it seems to work fine. You can make your own cable. Buy the glass gauge connector kit from Duniway, get some moderately heavy gauge sheilded multi conductor and some thin coax, and finally acquire the correct special dsub. They are for sale if you look. Or hack a more readily availabl...
by ian_krase
Fri Feb 16, 2018 10:09 am
Forum: The Trading Post
Topic: Cute Ion source for vacuum chamber
Replies: 4
Views: 138

Re: Cute Ion source for vacuum chamber

Can you tell us the dimensions?

Let me guess: is this from an electron beam melter?
by ian_krase
Thu Feb 15, 2018 7:41 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Bonding Tungsten and/or Iridium?
Replies: 27
Views: 1790

Re: Bonding Tungsten and/or Iridium?

While my inadequate resistance brazing transformer was working pretty well for soldering tungsten filaments to SS conductors, I decided I wanted something more. . But... The whole machine was rather dangerous and clumsy (exposed line current wiring attached to variac by screw terminals, disconnect o...
by ian_krase
Thu Feb 15, 2018 7:18 am
Forum: FAQs: Fusor Construction & Operation
Topic: FAQ - Joining metals - A critical fusor construction element
Replies: 1
Views: 112

Re: FAQ - Joining metals - A critical fusor construction element

Let me give my practical comments on this: - Soft soldering works great on copper and copper alloys, not so great on steel, and requires specialized (noxious) fluxes on aluminum and stainless. That said, I assembled my first "real" vacuum equipment using soft solder and it is still going strong. - S...
by ian_krase
Thu Feb 15, 2018 5:53 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Inner Grid Rings and High Voltage Feedthrough
Replies: 5
Views: 137

Re: Inner Grid Rings and High Voltage Feedthrough

For demo fusors some people make a curly-cue grid out of a single SS or tungsten wire with no joints.
by ian_krase
Sun Feb 11, 2018 10:48 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Neon Sign Transformer Help
Replies: 2
Views: 123

Re: Neon Sign Transformer Help

I think it's possible to get around GFCI.

I know that Oil Burner Ignition Transformers are a viable alternative.
by ian_krase
Fri Feb 02, 2018 10:26 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusion Claim - Jackson Oswalt
Replies: 15
Views: 629

Re: Fusion Claim - Jackson Oswalt

It happened to me though!
by ian_krase
Thu Feb 01, 2018 8:17 am
Forum: The Trading Post
Topic: Extra tungsten possibly for sale
Replies: 4
Views: 215

Re: Extra tungsten possibly for sale

Tungsten is kind of a pain. Very stiff, very springy, and very brittle -- gets even more brittle (and less springy) after its been at white hot for a while. Will bend into very sharp, rigid bends... and also break if you bend it too far. Also kind of hard to cut -- one often ends up nicking it with ...
by ian_krase
Thu Feb 01, 2018 8:16 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusion Claim - Jackson Oswalt
Replies: 15
Views: 629

Re: Fusion Claim - Jackson Oswalt

Most of us don't like the idea of running a vacuum pump for hours and hours when we're not at home. Especially not if we can't afford the right valves and stuff for good auto-isolation in case of power failure or forepump failure.

(only gets worse when turbos are involved)
by ian_krase
Tue Jan 30, 2018 7:53 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High voltage wire
Replies: 7
Views: 243

Re: High voltage wire

Otoh, I have to say I'm a bit skeptical as to the thickness of that insulation.