Search found 1221 matches

by John Futter
Sun Mar 01, 2020 5:42 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: HF switcher supply construction and voltage multiplication
Replies: 25
Views: 2874

Re: HF switcher supply construction and voltage multiplication

You are on the right track
But this is not easy
read the appropriate forums here. There are people who have modified or made from scratch these sort of supplies, but not many due to difficulty.
by John Futter
Thu Feb 27, 2020 6:52 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Vacuum Chamber Construction
Replies: 82
Views: 27152

Re: Vacuum Chamber Construction

Nicolas
For a first effort I give you a B+
Well done
by John Futter
Thu Feb 27, 2020 5:41 am
Forum: Images du Jour
Topic: Dallas Maker Space setup progresses
Replies: 6
Views: 1495

Re: Dallas Maker Space setup progresses

Robert
please follow this sites rules
which you agreed to when registering

1./as to your name

2./ where your first post should be
by John Futter
Thu Feb 27, 2020 5:13 am
Forum: Vacuum Technology (& FAQs)
Topic: Small and simple mass-spectrometer
Replies: 8
Views: 6502

Re: Small and simple mass-spectrometer

Adelk
Please follow the site rules
You did not use your real full name
You did not introduce yourself in the appropriate subforum
please correct this before more posts


Ands it is a bit odd replying to a post that is 9 years old!!!
by John Futter
Wed Feb 26, 2020 6:06 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Belgian Fusor build
Replies: 9
Views: 797

Re: Belgian Fusor build

Steven Check out the history on this site I posted an experiment I did about tens years ago on damage tracks in polycarbonate plastic from neutrons I think I used ethyl alchohol to develope the tracks afterward. youstill have to use a moderator to thermalise the nuetrons iused wax blocks each side o...
by John Futter
Wed Feb 26, 2020 6:04 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Belgian Fusor build
Replies: 9
Views: 797

Re: Belgian Fusor build

Steven Check out the history on this site I posted an experiment I did about tens years ago on damage tracks in polycarbonate plastic from neutrons I think I used ethyl alchohol to develope the tracks afterward. youstill have to use a moderator to thermalise the nuetrons iused wax blocks each side o...
by John Futter
Wed Feb 19, 2020 8:36 pm
Forum: Philo T Farnsworth Archive
Topic: A Farnsworth fusor effort history forum??
Replies: 9
Views: 768

Re: A Farnsworth fusor effort history forum??

Yes Frank
Over pictures this then allows the moderator to corrctly resample /resize to minimise storage problems
Maybe this sub forum needs a sandbox attached for users to upload to ----that auto deletes files and photos itself monthly
by John Futter
Wed Feb 19, 2020 2:01 am
Forum: Philo T Farnsworth Archive
Topic: A Farnsworth fusor effort history forum??
Replies: 9
Views: 768

Re: A Farnsworth fusor effort history forum??

Richard Yes But with a caveat only moderators to post in it Not even senior users like myself This to keep it squeaky clean Ie no people answering /adding/ giving opinion. Any body wanting to put info into this forum will have post elsewhere on Fusor net board asking a moderator to post for them TTFN
by John Futter
Tue Feb 11, 2020 7:15 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Help with HV adjustable power supplies for radiation detectors.
Replies: 22
Views: 1837

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

Try a speed up cap across R1 47pf to 220pf but it should be ca 1kV type