Search found 81 matches

by apollo
Thu Nov 03, 2005 11:03 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Pressure required for poissor?
Replies: 0
Views: 1463

Pressure required for poissor?

<t>I am sure I'm very close to finally getting a poissor on my fusor.<br/> I got a few more parts for my fusor to adapt the Robinair fitting to the 1/2" NPT. I lowered the pressure from around 750 microns to 150. How much lower do I need to go? I still get a very diffuse glow that's definitely not a...
by apollo
Wed Sep 14, 2005 7:41 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Using Car coil transformer
Replies: 16
Views: 5231

Re: Using Car coil transformer

I'd hope that you could drive most ignition coils for a long period of time... the ones in cars have pretty much a dead short (except for resistor wire and resistor plugs of course) across their secondaries for hours at a stretch. You're probably driving it too hard. What is your setup like?
by apollo
Wed Sep 14, 2005 12:19 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Using Car coil transformer
Replies: 16
Views: 5231

Re: Using Car coil transformer

<r>Looks like Carl beat me to this by a bit, but yes, an iginition coil is a great place to start. You can make a 200-300W power supply using a flyback with this circuit:<br/> <URL url="http://forum.4hv.org/index.php?board=18;action=display;threadid=1723"><LINK_TEXT text="http://forum.4hv.org/index....
by apollo
Tue Sep 06, 2005 6:42 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Quick update on construction
Replies: 4
Views: 1843

Re: Quick update on construction

<r>Thanks edmo. I was wondering if you had any idea what the bottom fitting could be:<br/> <URL url="http://www.usatoolwarehouse.com/Merchant2/graphics/00000003/rob-15495.gif"><LINK_TEXT text="http://www.usatoolwarehouse.com/Merchan ... -15495.gif">http://www.usatoolwarehouse.com/Merchant2/graphics/...
by apollo
Mon Sep 05, 2005 9:21 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Quick update on construction
Replies: 4
Views: 1843

Re: Quick update on construction

Today I installed an accurate gauge and I'm right at 1000 microns. I should be able to get back down to well under 100 if I can ever figure out what this fitting is.
by apollo
Mon Sep 05, 2005 5:28 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Quick update on construction
Replies: 4
Views: 1843

Quick update on construction

<t>Hello everybody<br/> Yes, I'm still alive. I've been away for a long time working on several projects (fusor and Tesla coil, mostly). Thanks to the help of a professor at Union college in Schenectady, my Robinair issue will soon be solved. By simply sticking a hose over my 1/2" NPT fitting, he wa...
by apollo
Wed Jun 29, 2005 12:57 am
Forum: Vacuum Technology (& FAQs)
Topic: Pressure comparison
Replies: 5
Views: 2435

Re: Pressure comparison

Okay, I found that a 5/8" Flare connector actually fits very well. However, the pressure still isn't dropping enough! Would it be OK to use pipe thread sealant (Teflon-'enriched') or would that outgas too much? I think I'm very close!
by apollo
Tue Jun 28, 2005 8:43 pm
Forum: Vacuum Technology (& FAQs)
Topic: Pressure comparison
Replies: 5
Views: 2435

Re: Pressure comparison

<t>"You might consider just threading the fitting out of the pump and taking it to the hardware or plumbing supplier and finding a flare nut to fit. Or, simply buy a new fitting to thread into the pump which matches your tubing."<br/> <br/> The threading isn't removable. I already removed the T-fitt...
by apollo
Tue Jun 28, 2005 8:06 pm
Forum: Vacuum Technology (& FAQs)
Topic: Pressure comparison
Replies: 5
Views: 2435

Pressure comparison

<r>Hello everybody<br/> Working on this fusor is taking up a tremendous amount of time. I hope I'm moving in the right direction. My question is: am I actually lowering the pressure? My vacuum gauge was supposedly lost in the mail and it will be a while until I can get a new one. Here we go:<br/> <b...
by apollo
Fri Jun 24, 2005 1:48 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High Voltage Power Supply Design
Replies: 16
Views: 5007

Re: Simplified High Voltage Power Supply

With a two stage power supply, it should supply supply about 40KV at 20mA (assuming that that transformer can be pushed to 1200W) if my VDrop calculations are correct (you did have a two stage design in your doc, didn't you?).