Search found 733 matches

by Jerry Biehler
Mon Jun 22, 2020 9:52 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Transformer Input Meanings
Replies: 6
Views: 449

Re: Transformer Input Meanings

P1 , P2, or P3 are your primary connections. SHLD is shield, the shield on the cable supplying the power to the primary. If there is a shield it might be a high frequency drive transformer which you will need to either get or build a drive for it. With the physical size of both being so small I woul...
by Jerry Biehler
Sun Jun 21, 2020 8:27 pm
Forum: Announcements and Site Administration Topics
Topic: Space X conversation Xfer
Replies: 4
Views: 504

Re: Space X conversation Xfer

There is an array of switches below the touch screen for critical functions. But both screens can do the same functions so even if one screen died you still have the other. So first earth would have to lose control of the capsule, then both screens need to die. At that point so many things have gone...
by Jerry Biehler
Tue Jun 02, 2020 8:05 am
Forum: Vacuum Technology (& FAQs)
Topic: Old oil for the turbo
Replies: 5
Views: 907

Re: Old oil for the turbo

It depends, how much is worth risking the bearing in your pump. You can get off-brand versions of the same oil, I would rather do that than risk expensive bearings.
by Jerry Biehler
Sat May 23, 2020 5:37 pm
Forum: Vacuum Technology (& FAQs)
Topic: Foreline valve and trap - what is neccesary?
Replies: 13
Views: 949

Re: Foreline valve and trap - what is neccesary?

Not a strange mix, thats just your average valve, air operated. They use a solenoid to supply air pressure to a piston which either opens or closes the valve. Technically you could convert one to manual but it is more trouble than it is worth. And those are generic valves. These are true pump isolat...
by Jerry Biehler
Thu May 14, 2020 12:00 pm
Forum: Vacuum Technology (& FAQs)
Topic: Foreline valve and trap - what is neccesary?
Replies: 13
Views: 949

Re: Foreline valve and trap - what is neccesary?

I have never had a pump suck back into the foreline, not saying it cant happen, it just has not happened to me, they have internal checkvalves which would be about just as reliable as putting another valve in series. You could just use a length of line with a greater volume than how much the pump ho...
by Jerry Biehler
Sun May 10, 2020 5:37 pm
Forum: Announcements and Site Administration Topics
Topic: Coronavirus pandemic
Replies: 135
Views: 20894

Re: Coronavirus pandemic

That graph is linear because they are testing more and more people, last I heard it was over 200k a day and no longer are they just testing people who are symptomatic. It was just found that oregon had the first positive test Jan 26th, so this thing has been here way longer than what they knew about...
by Jerry Biehler
Thu Apr 30, 2020 8:57 am
Forum: Books & References
Topic: Penning trap
Replies: 3
Views: 585

Re: Penning trap

A penning for your thoughts?
by Jerry Biehler
Fri Apr 24, 2020 7:35 am
Forum: Items wanted
Topic: Edwards TAG controller
Replies: 6
Views: 756

Re: Edwards TAG controller

Pfeiffer also has the same type of controller/power supply unit. the DCU series. They also have some oddball voltages, namely 72v and 140v for the larger pumps. I ended up having to buy legitimate 140v Pfieffer power supply off ebay for my big turbo.
by Jerry Biehler
Wed Apr 15, 2020 12:05 am
Forum: Vacuum Technology (& FAQs)
Topic: First ever Turbo experience
Replies: 38
Views: 7116

Re: First ever Turbo experience

I fried the bearings on my TV-301 on my SEM by running it without the fan, wont make that mistake again.
by Jerry Biehler
Mon Apr 13, 2020 4:31 am
Forum: Vacuum Technology (& FAQs)
Topic: First ever Turbo experience
Replies: 38
Views: 7116

Re: First ever Turbo experience

Even on stuff where you just leave it on you want a fan.