Search found 10426 matches

by Richard Hull
Thu Apr 22, 2021 6:24 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: A 50kV supply with 33mA drive ability
Replies: 23
Views: 3341

Re: A 50kV supply with 33mA drive ability

All of your work is appreciated my those who seek to make everything in the power circuit more bullet proof. Ripple vs. pure, or close to it, DC with its attendant stored energy capacity is always going to be a tradeoff. The critical breakover ionization potential is always an issue. That is why the...
by Richard Hull
Wed Apr 21, 2021 8:36 pm
Forum: Vacuum Technology (& FAQs)
Topic: DIY Turbopump Controller
Replies: 35
Views: 4707

Re: DIY Turbopump Controller

Michal, a true love's labor and a grand win. I applaud both your and Nicolas' effort in electronics. I call it the hands on imperative or a "doer", doing. The epitome of the thrust of this site and of real amateur science is obtaining and retention of hard won skills that not only make life more ful...
by Richard Hull
Wed Apr 21, 2021 7:51 pm
Forum: Announcements and Site Administration Topics
Topic: Top Posters on the Forum
Replies: 4
Views: 170

Re: Top Posters on the Forum

Great to see the posting numbers of past posters. Thanks Frank! This is a great compilation. Dennis Brown, still a regular poster, is way high in posts and towers over many/most all others still here. Great work Dennis! Among those folks that have thousands of posts, but are no longer here, are Dave...
by Richard Hull
Wed Apr 21, 2021 5:50 am
Forum: Vacuum Technology (& FAQs)
Topic: Turbomolecular, Oil diffusion or Getter pump
Replies: 6
Views: 226

Re: Turbomolecular, Oil diffusion or Getter pump

I ran a diff pump from 2004-2019 with fusor IV with out ever removing or servicing it in any manner over the entire period. When I took it apart the oil looked good and the pump was clean. I took it apart and got the xmas tree cleaned of oil and dried the pump body for storage. I installed my first ...
by Richard Hull
Wed Apr 21, 2021 5:34 am
Forum: Images du Jour
Topic: Finn Hammer, fusor update.
Replies: 12
Views: 1136

Re: Finn Hammer, fusor update.

Great system Finn and a fine sequence of repetitive pump downs, well graphed for all of see. Seems like the system is well sealed and relatively dry for a first pump down....(thanks to the oven work). In use with a bit of ion bombardment with air it should dip a bit lower. Sorry to hear about the sn...
by Richard Hull
Tue Apr 20, 2021 6:39 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: NIM - "Oh let me count the ways"...but how many ways??
Replies: 9
Views: 887

Re: NIM - "Oh let me count the ways"...but how many ways??

Yep. It sure looks like the larger tube nixies that has got to a a 5 or 6 NIM slot gobble up! With that in your bin you are reduced to a Mini-NIM remainder.
I have never seen or heard of HP in the NIM biz. HP was an early user of the newly created Burroughs Nixies.

Richard Hull
by Richard Hull
Tue Apr 20, 2021 6:22 am
Forum: Announcements and Site Administration Topics
Topic: 13K ain't far away.
Replies: 1
Views: 127

13K ain't far away.

Hey, that title rhymed! I'm a poet and didn't know it, but my feet show it, they are Longfellows. (Couldn't resist that one. I kicked the slats out of my cradle laughing at that one, it's so old) I see that should I live to post about 70 more times, I will have placed 13,000 posts in these forums, a...
by Richard Hull
Sat Apr 17, 2021 5:25 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: PMT/Scint. divider topology differences
Replies: 6
Views: 308

Re: PMT/Scint. divider topology differences

I have always made up my PMT devices as separate. I have several Ludlum scint. probes that are single and they attach to walk-around survey meters. The single connection is fine for that purpose. For Gamma spec work, my 3 shiny chromed Bicrons and others like Harshaw always separate the HV from the ...
by Richard Hull
Thu Apr 15, 2021 4:34 am
Forum: Images du Jour
Topic: UPS Reactor - Plasma achieved!
Replies: 6
Views: 432

Re: UPS Reactor - Plasma achieved!

Dennis is correct. There are strict rules created last year for the plasma club. On that fatal day, which had over 100 claimants collected over 20 years were wiped from existence to have 0 names in the club until, over the last 5-6 months, we have only added three new members. Check out the rules an...
by Richard Hull
Wed Apr 14, 2021 3:52 am
Forum: Images du Jour
Topic: UPS Reactor - Plasma achieved!
Replies: 6
Views: 432

Re: UPS Reactor - Plasma achieved!

Congratulations on getting that glow in you project fusor. All the best in your group's continuing efforts in achieving fusion.

Richard Hull