Search found 821 matches

by Jerry Biehler
Fri Jun 08, 2018 7:53 am
Forum: Images du Jour
Topic: Cryocooler
Replies: 1
Views: 297

Re: Cryocooler

It's a sumitomo cooler, you will need the compressor section to go with it. Probably something like this: https://www.ebay.com/itm/Sumitomo-MRI-Helium-CSW-71C-Compressor-Serie-47C02192D-With-Cry-Control-Unit/112995151231?hash=item1a4f092d7f:g:TRsAAOSwB09YPygw Though you could probably make a CTI com...
by Jerry Biehler
Fri Jun 08, 2018 6:33 am
Forum: The Trading Post
Topic: MKS 901p vacuum gauges
Replies: 7
Views: 793

Re: MKS 901p vacuum gauges

I use RealTerm, probably the best terminal for techies out there that I have found. All sorts of cool options.
by Jerry Biehler
Mon Jun 04, 2018 8:35 am
Forum: Images du Jour
Topic: Gold Plasma
Replies: 7
Views: 606

Re: Gold Plasma

You sputtered a thin layer of something on there.
by Jerry Biehler
Fri Jun 01, 2018 5:16 am
Forum: New User Chat Area
Topic: Pneumatic gate valve trouble shooting
Replies: 12
Views: 681

Re: Pneumatic gate valve trouble shooting

I have a pump similar to that that I pulled off on of my coating systems. If I could get $300 out of it I would be very happy. They are pretty much useless in this day and age for anyone doing coating when you can get cryo and turbo pumps and they dont need baffles or cryotraps.
by Jerry Biehler
Thu May 31, 2018 6:21 am
Forum: New User Chat Area
Topic: Pneumatic gate valve trouble shooting
Replies: 12
Views: 681

Re: Pneumatic gate valve trouble shooting

Whoa, stop. This is a 6" ~2000l/s diffusion pump. Way, way to big for a fusor. Pneumatic gate valves are binary, open or closed, there is no in between. Technically you could only close them part way but it is going to be random where it stops. And even with controllable valves that will fit an ASA6...
by Jerry Biehler
Thu May 31, 2018 5:53 am
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum pump rebuild
Replies: 55
Views: 5723

Re: Vacuum pump rebuild

Really, he is lucky he is getting what he is with the condition of the pump.
by Jerry Biehler
Sat May 26, 2018 11:40 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: TIG welding tubing and flanges with an automated fixture
Replies: 8
Views: 1282

Re: TIG welding tubing and flanges with an automated fixture

A good chunk if not most of vacuum welding is done without filler. All fusion welds.
by Jerry Biehler
Tue May 08, 2018 3:33 am
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum pump rebuild
Replies: 55
Views: 5723

Re: Vacuum pump rebuild

At that point you are pretty much making the really slow equivalent of a booster pump, also known as a roots blower. They dont rely on good sealing between the lobes and the walls, there is no contact and no oil. They are there to massively move air.
by Jerry Biehler
Fri Apr 20, 2018 1:13 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: My Gamma Spectroscopy Setup
Replies: 5
Views: 725

Re: My Gamma Spectroscopy Setup

LN2 is not that bad. I use it for my EDX, I have a 25L dewar and it costs less than $20 to fill and if I am not using it lasts several weeks. I had a 50L and that thing would keep for quite a long time.
by Jerry Biehler
Wed Apr 18, 2018 3:26 am
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum pump rebuild
Replies: 55
Views: 5723

Re: Vacuum pump rebuild

Yep, unbolt the pump and check the rotor and stator. If there is ANY pitting the pump is scrap. That probably should have been the first thing that was done.