Search found 10413 matches

by Richard Hull
Sat Apr 10, 2021 11:35 pm
Forum: Announcements and Site Administration Topics
Topic: Neutron Club / Recycled Fusor
Replies: 5
Views: 60

Re: Neutron Club / Recycled Fusor

I was stunned that "Joe" won it. I had visions of our Joe Gayo driving to Miami from CA picking the system up and driving back! The codicil related to must "pick up, will not ship, will not break up system" put a real strain on anyone who might be beyond a very long one day round trip. But one never...
by Richard Hull
Sat Apr 10, 2021 5:37 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Long Lasting Bubble Detector
Replies: 6
Views: 187

Re: Long Lasting Bubble Detector

Thanks for the update on CA education direction. I know a teacher in our local school system. The kids are back in class and being taught now, finally, but it is exactly as you say. No hands on and the death of any cursive writing, no history in many cases, STEM stuff is dumbed down and I was stunne...
by Richard Hull
Sat Apr 10, 2021 5:10 am
Forum: Vacuum Technology (& FAQs)
Topic: The calibration of Baratrons
Replies: 6
Views: 251

Re: The calibration of Baratrons

I'm not so adventurous as to mess with the baratron electrons. Tylan got it good enough for my purposes. The orientation issue and recal issue was important when I moved the orientation on fusor V. I went overboard and let the thing warm in its new position for 3 hours before zeroing. With the Turbo...
by Richard Hull
Fri Apr 09, 2021 6:13 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Long Lasting Bubble Detector
Replies: 6
Views: 187

Re: Long Lasting Bubble Detector

You are correct of course, however the killer is the equal cost of their outrageous shipping and minimum order quantity. As you note they are a Godsend to the "in it to win it" crowd to whom electronic detection is a bridge too far and activation is out of the question as they will never get the fus...
by Richard Hull
Fri Apr 09, 2021 6:01 pm
Forum: Vacuum Technology (& FAQs)
Topic: Bell and whistles diffusion pump based vacuum system.
Replies: 32
Views: 4632

Re: Bell and whistles diffusion pump based vacuum system.

This is, indeed and wonderful system. Unfortunately many folks can't afford all the valves. Back in 2004 I bought 4 Varian fully rebuilt 2.75 conflat bellows valves from Duniway for $1000. While expensive, they have worked and still work well in my system. Money well spent. Good multiple valving all...
by Richard Hull
Fri Apr 09, 2021 5:09 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Long Lasting Bubble Detector
Replies: 6
Views: 187

Re: Long Lasting Bubble Detector

Wow! You are a record holder!! I have bought about three BTI's over a period of 7 years 2004-2011 and one lasted 4 months (leaked). Another went about 8 months and the last one about 6 months. I did store the dosimeters in their tube, as recommended, and stored in my heated and air conditioned home....
by Richard Hull
Fri Apr 09, 2021 4:58 am
Forum: Vacuum Technology (& FAQs)
Topic: The calibration of Baratrons
Replies: 6
Views: 251

Re: The calibration of Baratrons

Sorry I forgot to mention the 2 hours warm up period on the 0.1 torr model. I found out the hard way back in 2004. I had to constantly readjust the zero, until I gave mine the demanded 2 hour warm up period. Once I really got it zero'd, if I tried to run it right off the bat, it was way off at the l...
by Richard Hull
Thu Apr 08, 2021 7:29 pm
Forum: Interesting Links
Topic: New Physics?
Replies: 1
Views: 147

Re: New Physics?

I have followed this myself over the last few days. I have always personally hoped the standard model would crash and burn. However, there are a ton of little Dutch boys ever eager to plug the hole in the dike containing the standard model. Who really cares about quarks and the like that require loc...
by Richard Hull
Thu Apr 08, 2021 6:44 pm
Forum: Vacuum Technology (& FAQs)
Topic: The calibration of Baratrons
Replies: 6
Views: 251

Re: The calibration of Baratrons

Finn, I have 10 Baratrons here! I use a 0.1 torr "heated" Baratron on fusor V. The expert to ask is Steve Hansen of the Bell Jar. He worked for MKS for years. If he doesn't know, no one on earth knows. The reason the 0.1 torr baratron is heated is to retain precision in the stabilized electronics an...
by Richard Hull
Wed Apr 07, 2021 5:26 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: How much power is lost to the cathde
Replies: 4
Views: 641

Re: How much power is lost to the cathde

This chart is good, but doesn't show issues at fusor operational voltages. The shell is where all the power loss tends to occur, where your chart does, indeed, indicate as the grid losses dip at higher voltages and lower pressures. Shell losses are electron bombardment and neutral collisions. Richar...