Search found 1222 matches

by John Futter
Tue May 05, 2020 7:24 am
Forum: Images du Jour
Topic: GE dental x-ray heads?
Replies: 5
Views: 739

Re: GE dental x-ray heads?

Rich
glazing of the copper is common for something not used for years. I've seen the same on brush excited gen sets.
i use the 3M green scouring pad with a little water with 30% detergent. wash afterwards with alchohol and dry with hot air gun

bet it works after this
by John Futter
Mon May 04, 2020 8:59 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Help with HV adjustable power supplies for radiation detectors.
Replies: 22
Views: 1846

Re: Help with HV adjustable power supplies for radiation detectors.

Cai
Both Doug Coulter and myself have used similar bought from Mouser and I got 15 watts max out of mine they are meant to run one or two 5-8 watt flouro tubes as used in laptop LCDs
by John Futter
Mon May 04, 2020 10:20 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Help with HV adjustable power supplies for radiation detectors.
Replies: 22
Views: 1846

Re: Help with HV adjustable power supplies for radiation detectors.

Cai
most of these can do up to 10 watts of output some a little more
from that you can work it out
by John Futter
Mon May 04, 2020 12:02 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Easy $150 Neutron Detection System
Replies: 20
Views: 2386

Re: Easy $150 Neutron Detection System

Sarmad
you have not completed your registration on this site, and you are not following the site rules
your first post must be in the "Please introduce yourself" forum

otherwise you are starting to act troll like
by John Futter
Mon Apr 27, 2020 4:59 am
Forum: Images du Jour
Topic: Jim Kovalchick -My attempt at smaller fusor
Replies: 86
Views: 8447

Re: Jim Kovalchick -My attempt at smaller fusor

Jim
just put a neodynium magnet against the fusor side of your viewport, this should pull the electron beam away from the glass
by John Futter
Sun Apr 26, 2020 2:07 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusor V construction - the process long running
Replies: 44
Views: 5632

Re: Fusor V construction - the process long running

Dennis The mode of destruction is not through the throat of the turbo. The major cause of failure is the use of coax high voltage leads that increase the capacity on the output high voltage this then causes higher dI/dt events causing ground bounce. yes star grounding in evidence much as possible. N...
by John Futter
Sat Apr 25, 2020 6:58 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusor V construction - the process long running
Replies: 44
Views: 5632

Re: Fusor V construction - the process long running

It will not be the windings this from a shelf of US (unervicible) nt 10, nt 13, nt20 etc with a few Edwards turbo controllers thrown in All from arcs in the early days from the ion source or accel stage system development. lots of ferrite and TVS diodes later we do not sacrifice to the gods of high ...
by John Futter
Mon Apr 20, 2020 10:10 pm
Forum: Items wanted
Topic: Edwards TAG controller
Replies: 6
Views: 621

Re: Edwards TAG controller

your link gives a 404 error "site not found"
this is the reason we always prefer you to load an attachment picture to your post
by John Futter
Mon Apr 20, 2020 6:46 am
Forum: Items For Sale
Topic: Pumps "R" Us
Replies: 4
Views: 1131

Re: Pumps "R" Us

Ryan
The leybolds require their own frequency conversion units
NT10, NT13 controllers come to mind both of these offer 100 volts or 230 volts.
i'm selling the turbo only not the controller (drive unit)
If you search this site you will find my solution to building your own controller
by John Futter
Thu Apr 16, 2020 9:32 pm
Forum: Announcements and Site Administration Topics
Topic: Coronavirus pandemic
Replies: 100
Views: 9146

Re: Coronavirus pandemic

So who is getting a handle on Covid here in NZ 1400 infected 9 deaths we are a sixtyeth of the population of the USA so to give a comparison multiply the nz numbers by 60 and compare to the USA data here https://gisanddata.maps.arcgis.com/apps/opsdashboard/index.html#/bda7594740fd40299423467b48e9ecf...