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by Richard Hull
Mon Jan 21, 2019 7:40 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: 50kV Supply
Replies: 18
Views: 491

Re: 50kV Supply

I agree! maybe in the nano farad range like .002uf = 2nfd = 2000pf. They are just too big to be .1pf. I don't know if I have ever beheld a .1 pf cap.
Normal capacitance between nearby wires might be in the .1pf range.

Richard Hull
by Richard Hull
Mon Jan 21, 2019 7:27 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Construction of Neutron Grade Fusor
Replies: 17
Views: 459

Re: Construction of Neutron Grade Fusor

You should have something a bit more definitive in the way of a differential. Let me get this straight....You dad was holding the bare tube during the count runs! The human body is a big bag of moderating water and that can spoil the result you should lay the tube down near the fusor preferably at l...
by Richard Hull
Mon Jan 21, 2019 7:17 pm
Forum: FAQs: Fusor Construction & Operation
Topic: FAQ - A new fusor Construction paradigm for 2018
Replies: 4
Views: 1601

Re: FAQ - A new fusor Construction paradigm for 2018

Joe, thank you ever so much for your diligence and continued assistance and suggestions. You are helping to make these forums a better place. I have just added the atta-boy to Garrett Young's neutron club name, giving him credit as being the first one to exceed the mega n/s TIER in a 2.75 conflat cr...
by Richard Hull
Mon Jan 21, 2019 6:49 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Construction of Neutron Grade Fusor
Replies: 17
Views: 459

Re: Construction of Neutron Grade Fusor

Bruce said it all well. The moderator with tube in it should be at fixed distance X. The tube out of the moderator should be at that exact same distance X. The moderator must be a good distance away,(many feet distant). Only then is the count comparison more or less equal.

Richard Hull
by Richard Hull
Mon Jan 21, 2019 12:09 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Institutional Quackery
Replies: 6
Views: 179

Re: Institutional Quackery

Another attempt at saying real soon now. Interesting, but it doesn't feed the bulldog. Lots of computation, yet little idea about the capability of the reliability of the neutron measurements in burst mode where RF might be an issue.

Richard Hull
by Richard Hull
Sun Jan 20, 2019 5:03 am
Forum: Images du Jour
Topic: Joe Gayo's Fusor - Neutron Detection Upgrade
Replies: 13
Views: 552

Re: Joe Gayo's Fusor - Neutron Detection Upgrade

The micromase was pushed by Lesker for a few years and is no longer available. It was great and could warrant about one order of magnitude below a good mechanical pump that could go under 10 microns on its own. It had its own internal heater to purge bad stuff out and clean itself up. It was found b...
by Richard Hull
Sun Jan 20, 2019 4:56 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)
Replies: 36
Views: 1071

Re: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)

Chris has it right. USB is still forming and might never stop evolving the RS serials and GPIB are so dead, they are set in stone. Slow yet reliable and easily worked with to this day. You pay for the late and great super fasts which may or may not survive a new operating system or connectivity rage...
by Richard Hull
Sun Jan 20, 2019 4:45 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: 50kV Supply
Replies: 18
Views: 491

Re: 50kV Supply

75khz may heat the ceramic caps a bit and reduce the full power duty cycle run times, but it is rare you would need tremendous full power runs. 40kv @ 10 ma is 400 watts. In Tesla work, it was found that the higher the spark interrupt rate, ceramic capacitors would drop in capacitance as the silver ...
by Richard Hull
Sun Jan 20, 2019 4:34 am
Forum: Announcements and Site Administration Topics
Topic: Straw Poll / Proposal for San Francisco Area mini-meetup
Replies: 21
Views: 1282

Re: Straw Poll / Proposal for San Francisco Area mini-meetup

Bold effort and commended to the greatest degree. Keep trying and all the very best wishes for you and all those fusioneers in CA.

Richard Hull
by Richard Hull
Sat Jan 19, 2019 5:35 am
Forum: Images du Jour
Topic: Joe Gayo's Fusor - Neutron Detection Upgrade
Replies: 13
Views: 552

Re: Joe Gayo's Fusor - Neutron Detection Upgrade

My First fusion was with a mechanical pump that could hit 5 microns, backed by a micromaze that bottomed my TC gauge. (actual vacuum unknown). The best I ever did with fusor III was 250kn/s but I never got above 32 kv. Now that we are into the wall loading concept, day to day operation will see a bi...