Search found 10578 matches

by Richard Hull
Tue Jan 16, 2018 4:58 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: A Bunch of Failures
Replies: 46
Views: 1129

Re: A Bunch of Failures

I feel that a general comment is due here. You have had more problems than one might imagine related to just arriving at even a very crude and worthless vacuum level. This is virtually unheard of in these forums. Can you trust your gauge? We do not know. Do you have a good pump, at last? We do not k...
by Richard Hull
Sun Jan 14, 2018 12:39 am
Forum: New User Chat Area
Topic: Serial communication
Replies: 12
Views: 331

Re: Serial communication

I would go to the Arduino home page and there is a very adroit crowd there in the troubleshooting forum, just itchin' to help if you define your problem well. I have never tried to send-receive out of the serial port on the arduino I tend to go for I2C communication (two wire interface). I do use th...
by Richard Hull
Fri Jan 12, 2018 7:56 am
Forum: Please Introduce Yourself
Topic: Hello from Richmond, VA!
Replies: 1
Views: 90

Re: Hello from Richmond, VA!

Welcome James, I am glad to hear that you are starting to be able to have a workshop/lab of sorts. Working with the hands to make experiment is a good thing for any scientific minded person.

Richard Hull
by Richard Hull
Wed Jan 10, 2018 4:49 am
Forum: Vacuum Technology (& FAQs)
Topic: Question About Design Trade-offs for Backing Pumps
Replies: 20
Views: 438

Re: Question About Design Trade-offs for Backing Pumps

The 5 CFM Yellow jacket that I had was 15 years old and was 100% U.S. made. In spite of it having been used in HVAC work for God knows how long, it still pulled to 10 microns in the bell jar of fusor II. I can't speak for current product. The gauge is worthless and is in inches of vacuum. Only a goo...
by Richard Hull
Tue Jan 09, 2018 9:37 pm
Forum: Advanced Technical Discussion Area
Topic: Alternative Reactor Design
Replies: 13
Views: 2806

Re: Alternative Reactor Design

Thanks for recognizing that I was talking about absolute, 100% continuous neutron flux systems that are start'em up then walk away for months, years with a good stable flux. Only one exists....Fission reactors. Waste heat makes electricity. Fission reactor neutrons can make more fission and fusion f...
by Richard Hull
Tue Jan 09, 2018 9:24 pm
Forum: Vacuum Technology (& FAQs)
Topic: Question About Design Trade-offs for Backing Pumps
Replies: 20
Views: 438

Re: Question About Design Trade-offs for Backing Pumps

if you can reach 35 microns, fine. However the rule is go as low as you can go on the foreline pump. A diff pump goes lower if you can go below 10 microns on the foreline at the inlet. As we have in the FAQs Find out what your pump can do with a known good TC gauge at the inlet. That is what the dif...
by Richard Hull
Tue Jan 09, 2018 9:12 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: A Bunch of Failures
Replies: 46
Views: 1129

Re: A Bunch of Failures

It will pump or it will not pump regardless of oil. This is not a new pump. Remember it was bought from a guy who shipped it with oil in it. Not a real vacuum head who owned it last. No good vacuum head ships a pump full of oil.

Richard Hull
by Richard Hull
Mon Jan 08, 2018 11:41 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: A Bunch of Failures
Replies: 46
Views: 1129

Re: A Bunch of Failures

Direct drive oil is direct drive oil and as long as your Robinair oil is fresh from the jug it will suffice until your 19 oil arrives. Try it and see what pressure you hit at the inlet of the pump.

Richard Hull
by Richard Hull
Mon Jan 08, 2018 3:03 pm
Forum: Images du Jour
Topic: Small Scale Multi-Purpose High Vacuum Chamber
Replies: 5
Views: 454

Re: Small Scale Multi-Purpose High Vacuum Chamber

You are wise to spend a lot of time on the vacuum system. Once assembled it sounds like you will have a great system. All the best in getting it sealed and in good working order.

Richard Hull
by Richard Hull
Mon Jan 08, 2018 2:35 pm
Forum: Images du Jour
Topic: Wait, what? Tiny fusors? Not for me!
Replies: 35
Views: 1111

Re: Wait, what? Tiny fusors? Not for me!

Great work! The little BF3 tube did yeoman duty once hooked to the Ludlum. I have stored away in my lab, somewhere, a rather large BF3 tube that I bought in the late 90's from Don Orie of O.E. Technologies when he offered an attractive little box of assorted color quarks in his printed catalog. We a...