Search found 141 matches

by Liam David
Tue Feb 04, 2014 9:31 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High Voltage Grounding
Replies: 9
Views: 2854

Re: High Voltage Grounding

Thanks! The FAQ clears up some questions I had.
-Liam
by Liam David
Tue Feb 04, 2014 12:06 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High Voltage Grounding
Replies: 9
Views: 2854

Re: High Voltage Grounding

Don't have a voltage divider, so I don't know the voltage. I'm using 2 12kV diodes in series to rectify the transformer, so I'm getting a DC current.
-Liam
by Liam David
Mon Feb 03, 2014 10:48 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High Voltage Grounding
Replies: 9
Views: 2854

Re: High Voltage Grounding

I'm using a different transformer. For first light I used 3kV and now I'm using a 15kV. What do you mean by "what color?"
-Liam
by Liam David
Mon Feb 03, 2014 10:29 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High Voltage Grounding
Replies: 9
Views: 2854

Re: High Voltage Grounding

OK, I didn't have the chamber connected to the ground wire. I just had the positive going straight to the chamber and not to the ground. I'll see if I get better plasma after I rewire it. Thanks for the info!
-Liam
by Liam David
Mon Feb 03, 2014 8:34 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High Voltage Grounding
Replies: 9
Views: 2854

High Voltage Grounding

I recently acquired a 15 kV 60 ma NST. When I hooked it up to my demo fusor, I got the exact same plasma I had at 3kV, just plasma around the grid wires and not in the center. Also, I've been running the fusor with the positive on the chamber wall and the NST case and the negative on the inner grid....
by Liam David
Thu Jan 30, 2014 12:17 pm
Forum: Vacuum Technology (& FAQs)
Topic: Roughing Pump Cooling
Replies: 14
Views: 4455

Re: Roughing Pump Cooling

No, is't a 2 stage pump. Its this one: http://www.ebay.ca/itm/2-Stage-3CFM-1-3HP-Rotary-Vane-Vacuum-Pump-Tool-HVAC-AC-A-C-R12-R22-R410-R134-/360804858590? . I do have a large chamber leak because the plasma stays lit for only about 5 seconds after I switch off the pump, so that might be it. If it st...
by Liam David
Wed Jan 29, 2014 8:53 pm
Forum: Vacuum Technology (& FAQs)
Topic: Roughing Pump Cooling
Replies: 14
Views: 4455

Roughing Pump Cooling

I have a roughing pump to get my chamber down to about 5 microns, and after about five minutes of operation, the pump casing gets almost too hot to touch. Does anyone have any recommendations for cooling it off? I've already tried using a fan, but that didn't work well. Don't want to fry a $150 pump...
by Liam David
Sun Jan 26, 2014 8:21 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Demo Fusor First Light
Replies: 8
Views: 3139

Re: Demo Fusor First Light

Also, does anyone know of any 10-15 kV NST sources? I'd like to get a ball of plasma instead of just plasma on the grid wires.
by Liam David
Sun Jan 26, 2014 8:18 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Demo Fusor First Light
Replies: 8
Views: 3139

Re: Demo Fusor First Light

Thanks! I'll see if I can find the leak.
-Liam
by Liam David
Sun Jan 26, 2014 5:06 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Demo Fusor First Light
Replies: 8
Views: 3139

Re: Demo Fusor First Light

Tom,
I've been trying to find a cheap cf flange vacuum chamber, but haven't had any luck. I'll try adding another gasket to the plexiglass viewport.
-Liam