Search found 1272 matches

by John Futter
Fri May 25, 2018 7:54 am
Forum: Images du Jour
Topic: Vacuum breakers
Replies: 2
Views: 121

Re: Vacuum breakers

aaaaah fixing a problem that could exist on a 1,000,000,000,000, : 1chance of somebody actually usinng a hose when a negative pressure event caused by alien invasion is taking place. I'm glad your city has senior idiots empowered to think of of all these implausible happenings - this of course after...
by John Futter
Tue May 22, 2018 6:58 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Hitachi hv supply
Replies: 2
Views: 192

Re: Hitachi hv supply

Caliban or who ever
if you followed the forum rules you might get more response
first post should be the introduce yourself forum
you must use your full real name in both fields no handles ie Caliban to be used
by John Futter
Fri May 18, 2018 7:37 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: lab electromagnet from scratch
Replies: 53
Views: 13376

Re: lab electromagnet from scratch

Rich I agree with Richard your flux return path steel is way too thin. I meant to photogragh several of our big magnets @ work but ran out of time. These are made here in NZ by who make 95% of the magnets used in the semiconductor industry world wide and a...
by John Futter
Thu May 17, 2018 7:34 pm
Forum: New User Chat Area
Topic: NST
Replies: 1
Views: 84


This has been answered in the FAQ's

this is not a spoon feeding forum
but as you have now posted in the new user chat area
yes that transformer looks ok as long as it does not have a GFC included
by John Futter
Mon May 14, 2018 6:59 pm
Forum: Images du Jour
Topic: Corrosion cleanup yet again
Replies: 5
Views: 338

Re: Corrosion cleanup yet again

use petrol as a degreaser on a rag (careful not to smoke at the same time)
then Simple Green / CLR to remove the last traces of oilyness
by John Futter
Sun May 13, 2018 8:02 am
Forum: The Trading Post
Topic: For Sale: Mechanical Pump and Vacuum Gauge
Replies: 3
Views: 658

Re: For Sale: Mechanical Pump and Vacuum Gauge

You answered your own question
by John Futter
Thu May 10, 2018 8:31 am
Forum: FAQs: Neutron - Radiation Detection
Topic: FAQ - Extensive paper on neutron activation
Replies: 4
Views: 317

Re: FAQ - Extensive paper on neutron activation

well done
It might pay to indicate early on that the neutron interacts with the nucleus in most situations jiggling/ upsetting the contents and modifying the atomic weight gain / loss (ie isotopic makeup) some nuclear outputs being happy (stable) others in a bind (unstable)
by John Futter
Wed May 09, 2018 7:54 pm
Forum: FAQs: Fusor Construction & Operation
Topic: FAQ - Fusor gas delivery and pressure control system
Replies: 6
Views: 774

Re: FAQ - Fusor gas delivery and pressure control system

You do not ask questions in FAQ's
your question should have been asked in the "New User Chat Area"

Richard please remove this and Noahs ? in a few days to keep the FAQ clean
by John Futter
Tue Apr 24, 2018 6:44 am
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum pump rebuild
Replies: 50
Views: 3487

Re: Vacuum pump rebuild

Tyler your father has introduced you to the magic of reduction in this case iron oxide is being reduced back to iron. this process is used by vintage experts to reclaim old engine parts left out in the weather for 50 years or more. Note to others if it is a saltwater corrosion you have to use a diff...
by John Futter
Sat Apr 21, 2018 9:11 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Detector noise problem
Replies: 9
Views: 872

Re: Detector noise problem

dont forget that input capacitance is directly proportional to noise each input pf adds noise and limits bandwidth in a charge amplifier. this seen in some ORTEC preamps where they try to match input capacity to the feedback capacitor ie they change the feedback cap with a switch. the best match is ...