Search found 722 matches

by Jerry Biehler
Wed Mar 11, 2020 7:53 am
Forum: Vacuum Technology (& FAQs)
Topic: McMaster Carr's oddly inexpensive turbopump
Replies: 7
Views: 551

Re: McMaster Carr's oddly inexpensive turbopump

Same kit is about the same price at lesker. https://www.lesker.com/newweb/vacuum_pu ... er_eco.cfm

With a diaphragm backing pump its a lot cheaper than a oil pump, the turbo by itself sells for about $6k.
by Jerry Biehler
Sun Feb 09, 2020 10:02 pm
Forum: Vacuum Technology (& FAQs)
Topic: 2200 l/s turbos
Replies: 7
Views: 1183

Re: 2200 l/s turbos

How much do you have in them? Start them low and let them find their own level. Prepare to deal with shipping if you do and dont forget to put crating expenses in the listing.
by Jerry Biehler
Mon Feb 03, 2020 7:52 am
Forum: Vacuum Technology (& FAQs)
Topic: 2200 l/s turbos
Replies: 7
Views: 1183

Re: 2200 l/s turbos

Sell them on ebay. There is someone trying to sell a couple of them on ebay for a crazy high price, they will never sell. They are worth probably $1k a piece in an unknown state without a controller.

If they are maglev there is zero chance you will get them running by by building a controller.
by Jerry Biehler
Thu Dec 05, 2019 7:24 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Steel or aluminum baseplates and other questions
Replies: 7
Views: 878

Re: Steel or aluminum baseplates and other questions

Dont use steel, it is a mess. Stainless and aluminum is best. You can get nice rounds of aluminum tooling plate from S&S machine, I have used them a couple times: http://www.sandsmachine.com/alumweb.htm
by Jerry Biehler
Tue Oct 15, 2019 5:14 am
Forum: Vacuum Technology (& FAQs)
Topic: First ever Turbo experience
Replies: 24
Views: 4264

Re: First ever Turbo experience

I think I fried bearings on a varian pump by running it without cooling and it was connected to a SEM, so no gas load. So watch it, I would at least put a muffin fan on it like in the manual.
by Jerry Biehler
Mon Oct 14, 2019 6:58 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Possible Sputter Conductivity Issues
Replies: 7
Views: 1254

Re: Possible Sputter Conductivity Issues

On deposition system all the power feedthroughs are covered with a cap that kind of looks like a copper pipe end cap with a hole in the center. The conductor passes though and the concave side covers a portion of the insulator. This creates a "shadow" and prevents material from coating the insulator...
by Jerry Biehler
Thu Oct 10, 2019 12:37 am
Forum: Vacuum Technology (& FAQs)
Topic: First ever Turbo experience
Replies: 24
Views: 4264

Re: First ever Turbo experience

Manual is here, its kind of awful, I use a similar vintage pump in my SEM. https://fusor.net/board/viewtopic.php?t=8021 Pumping unit turns on a relay that can control the fore pump and the turbo I believe. Heater is for baking out, rarely used. First thing I would do is change the oil, it uses the s...
by Jerry Biehler
Wed Sep 25, 2019 12:11 am
Forum: Vacuum Technology (& FAQs)
Topic: TurboVac 50 troubleshooting
Replies: 8
Views: 1401

Re: TurboVac 50 troubleshooting

Im betting you dont have as low foreline pressure as you thing you do. The nt-50 will light fail if the drive does not see fast enough acceleration and that is usually from too high of pressure.
by Jerry Biehler
Sun Sep 08, 2019 12:43 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Photography of Plasma and Glow Discharge
Replies: 5
Views: 1026

Re: Photography of Plasma and Glow Discharge

Get a chunk of leaded glass if you are having x-ray problems. For you and the camera.
by Jerry Biehler
Sun Sep 08, 2019 12:41 am
Forum: Vacuum Technology (& FAQs)
Topic: Turbopump Bearing Kits - anybody have experience?
Replies: 3
Views: 1253

Re: Turbopump Bearing Kits - anybody have experience?

I replaced one in a large 1000l/s pfeiffer, pretty easy. I found a company that made Steel/SiC bearings and selected one the right size. The only difference was the plastic keeper for the balls was different but I was able to transfer from the old to the new. Alpine Bearing makes a lit of bearing ki...