Search found 1350 matches

by John Futter
Mon Nov 19, 2018 2:48 am
Forum: Announcements and Site Administration Topics
Topic: Finished PhD, now a postdoc at MIT
Replies: 8
Views: 1264

Re: Finished PhD, now a postdoc at MIT

Well done Andrew

hope the future brings many neuts
by John Futter
Sat Nov 17, 2018 5:45 am
Forum: New User Chat Area
Topic: Good Auction? [Leybold Turbovac 150]
Replies: 6
Views: 683

Re: Good Auction? [Leybold Turbovac 150]

You can make your cables for this pump the pump uses a standard octal valve (Tube) Socket if you build your own controller like I have then the other end of the cable is what you have on hand There are about 5 differing controllers for this pump from Leybold The latest is one that does the 150 throu...
by John Futter
Tue Nov 13, 2018 2:35 am
Forum: New User Chat Area
Topic: Slight dents on the knife edge... Will it work?
Replies: 3
Views: 495

Re: Slight dents on the knife edge... Will it work?

there is no guarentee as what vacuum a damaged bflange will get to
how ever an oring instead does not use the knife edge so it will sealand is more than good enough to 10^ -7 torr
the best optionis to have the damaged seal cut off and a new one welded on
by John Futter
Fri Nov 09, 2018 6:23 am
Forum: Please Introduce Yourself
Topic: Hello
Replies: 1
Views: 287

Re: Hello

Welcome Molly
it pays to read all the FAQ's found at the top of each sub forum.
Most if not all your questions are answered by these faq's
if still not sure ask a question in the new user chat area

good luck
by John Futter
Thu Nov 08, 2018 6:14 pm
Forum: Vacuum Technology (& FAQs)
Topic: Welch 1402 oil recomentation
Replies: 1
Views: 463

Re: Welch 1402 oil recomentation

epiepi how about following the forum rules your first post should have been in the "please introduce yourself" sub forum secondly this question should have been asked in the "New User Chat area" thirdly if you had actually done some reading of the sub forums you would find many answers to your quest...
by John Futter
Wed Nov 07, 2018 6:26 pm
Forum: Vacuum Technology (& FAQs)
Topic: TEFLEX seals for ISO-K
Replies: 6
Views: 874

Re: TEFLEX seals for ISO-K

Georg you are doing about as well as a turbo can do in the real world I'm not talking aboout the un-real ultimate vacuum they report on the datasheet we use viton at work on ion pumped systems that go down to the low 10^-9 millibar and we do not cool the flanges so all orings are at lab temp of 21 d...
by John Futter
Fri Nov 02, 2018 1:43 am
Forum: New User Chat Area
Topic: Neon sign transformer, AC to DC
Replies: 10
Views: 1656

Re: Neon sign transformer, AC to DC

Jake
You really do need to read all the faq's on this site before asking this question

hint 1 viewtopic.php?f=29&t=8710

and there are many more
by John Futter
Thu Nov 01, 2018 5:44 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Detector and Moderator Test
Replies: 10
Views: 1842

Re: Neutron Detector and Moderator Test

Kai I do this sort of thing for a day job. you need to have a couple of differing brand detectors preferrably from differnt vendors that are in calibration. I have used Am /Be neut source 70mega Bq (that is the Alpha output from the Am) and just like you have done I put the detectors 1.00 metres awa...
by John Futter
Sun Oct 28, 2018 1:29 am
Forum: Please Introduce Yourself
Topic: Greetings from Romford, Essex
Replies: 4
Views: 638

Re: Greetings from Romford, Essex

Shane
PS we do not repeat what others have written on this site to save server space
Paul our benefactor pays for the site and storage therein
by John Futter
Sat Oct 27, 2018 9:08 pm
Forum: Please Introduce Yourself
Topic: Greetings from Romford, Essex
Replies: 4
Views: 638

Re: Greetings from Romford, Essex

Welcome Shane just a word of warning We do not use or sannction the use of Tritium on this site. Opening up a tritium powered exit sign is against the law in all countries that are part of the IAEA which is most of the world except for a few rouge countries. I am very surprised that United Nuclear a...