Search found 272 matches

by Tom Dressel
Sun Mar 15, 2015 8:00 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Solderless Grid Construction
Replies: 7
Views: 8181

Re: Solderless Grid Construction

I donated my fusor to the University of Minnesota in November of 2012. Since then a group of Physics students, the Tesla group, has been working on the fusor and getting to know how to run the device. The most important development is that we managed to get our hands on a 2KW / 30 KV power supply. W...
by Tom Dressel
Tue Apr 10, 2012 8:57 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Cutting Alumina
Replies: 18
Views: 11614

Re: Cutting Alumina

If you are making only one cut, you can go to tile store near you and they will probably cut it for you. To cut my feedthrough, I went to a Color Tile shop and they did it for nothing.
Tom
by Tom Dressel
Thu Jul 03, 2008 10:20 pm
Forum: Vacuum Technology (& FAQs)
Topic: turbo pump broken?
Replies: 6
Views: 2755

Re: turbo pump broken?

You might try talking to "Jersey" at A J Vacuum services. They rebuilt my turbo and controller.and are very helpful.

http://www.ajvs.com/

Tom
by Tom Dressel
Mon Aug 14, 2006 10:50 pm
Forum: Vacuum Technology (& FAQs)
Topic: Turbo Pump Cleaning
Replies: 5
Views: 4357

Re: Turbo Pump Cleaning

For what it is worth, I am posting the cleaning instructiong for a TPU-40.
Also I have found the guys at A & J Vacuum Services helpful. Talk to Jersey. http://www.ajvs.com/.

Tom Dressel
by Tom Dressel
Tue Jun 06, 2006 11:14 pm
Forum: Vacuum Technology (& FAQs)
Topic: Monster turbomolecular pumps (Welch 3102)
Replies: 4
Views: 2538

Re: Monster turbomolecular pumps (Welch 3102)

<t>When I bought my Hummer V, which is a sputtering rig , it came with a Pfeiffer Balsers TPU 040 turbo. It had a copper blank gasket in the 2.75 CF throat. The blank gasket had a 1/4 inch hole drilled in it to limit the through put.<br/> Before shelling out for a buterfly valve you might try a stat...
by Tom Dressel
Wed Apr 05, 2006 7:43 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Radon detector for under $100.00
Replies: 50
Views: 11032

Re: Radon detector for under $100.00

<t>Yes, it was a good investment. <br/> <br/> A frend of mine who has a cabin on the north shore of Lake Superior, bought a series III detector and found Radon levels at 177 pCi/ liter in his basement.<br/> <br/> I can't believe the apathy amoung my collegues ( all physicians ) with respect to Radon...
by Tom Dressel
Sat Apr 01, 2006 11:51 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Radon detector for under $100.00
Replies: 50
Views: 11032

Re: Radon detector for under $100.00

Well, 72 hrs of sucking under the slab has pulled the Radon level in the basement down from 38.5 to 0.9 pCi//liter. Thats a 97% Reduction.

Remediation works!

Tom Dressel
by Tom Dressel
Wed Mar 29, 2006 10:10 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Radon detector for under $100.00
Replies: 50
Views: 11032

Re: Radon detector for under $100.00

<t>Twenty one years of sucking bad air.<br/> <br/> I don't spend much time in the basement now, but in the past I have spent hours down there watching TV and my wife now sits down there for hours watching DVD's.<br/> <br/> $1,425.00 is not inexpensive, but remember the radon detector was under $100....
by Tom Dressel
Wed Mar 29, 2006 5:58 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Radon detector for under $100.00
Replies: 50
Views: 11032

Re: Radon detector for under $100.00

<t>As of this writing I am having a sub slab suction system installed in my house to reduce the Radon levels. It consists of a 3" hole in the basement floor with ~5 gallons of dirt removed below the slab. The cavity is evacuated to the out side via a 3" PVC pipe and a fan. The goal is to establish a...