Search found 731 matches

by Jerry Biehler
Mon Dec 21, 2009 8:32 pm
Forum: Vacuum Technology (& FAQs)
Topic: Peltier Foreline trap design
Replies: 12
Views: 4130

Re: Peltier Foreline trap design

Its worth a try. I had tried to build a peltier cooling system for a small aquariums. The peltiers were cooled with a small refrigerated Neslab chiller. Didnt work. Still couldnt get the temp down any. And it was a little tank!
by Jerry Biehler
Mon Dec 21, 2009 8:26 pm
Forum: Vacuum Technology (& FAQs)
Topic: Varian versus Alcatel (Adixen) controllers.
Replies: 11
Views: 4323

Re: Varian versus Alcatel (Adixen) controllers.

Even though I dont deal in Quid that sounds a bit high. But not by too much. They are a competitor to the Amphenol style connectors and those suckers are usually about $40 plus a piece, more depending on the accessories you choose for them.
by Jerry Biehler
Mon Dec 21, 2009 5:59 am
Forum: Vacuum Technology (& FAQs)
Topic: Peltier Foreline trap design
Replies: 12
Views: 4130

Re: Peltier Foreline trap design

<t>I have not had good luck with peltiers. You will need a massive heat sink or water cooling on the hot side to keep the temp down or you will find that you are heating on the other end. Peltiers have their place like stabilizing laser diodes and cooling CCDs, but even CCDs are being cooled with sm...
by Jerry Biehler
Mon Dec 21, 2009 5:54 am
Forum: Vacuum Technology (& FAQs)
Topic: Varian versus Alcatel (Adixen) controllers.
Replies: 11
Views: 4323

Re: Varian versus Alcatel (Adixen) controllers.

Its a pretty typical ITT Cannon plug.
by Jerry Biehler
Wed Dec 16, 2009 7:35 am
Forum: Vacuum Technology (& FAQs)
Topic: Backstreaming
Replies: 25
Views: 6091

Re: Backstreaming

<t>When I cleaned out my system I managed to find a pint of Vacoil-S on ebay. Great stuff. Once I baked out my system it will go so low that I cant even read the pressure with my ion gauge which bottoms out at 2x10^10. And thats with a brand new ion controller. I have another one, and old Ultek, tha...
by Jerry Biehler
Wed Dec 16, 2009 7:07 am
Forum: Vacuum Technology (& FAQs)
Topic: Diffusion Pump Troubles
Replies: 25
Views: 6306

Re: Diffusion Pump Troubles (Bio Problems)

Another source of concentrated H2O2 is beauty supply places. The professional type. Supposedly up to 40%.

A friend of mine works on LASIK machines and used to work for ESI. He still works on ESI YAGs part time. Ill have to ask him what he uses.
by Jerry Biehler
Tue Dec 15, 2009 4:29 am
Forum: Vacuum Technology (& FAQs)
Topic: Diffusion Pump Troubles
Replies: 25
Views: 6306

Re: Diffusion Pump Troubles

<t>Easiest solution for water cooled diff pumps to get the needed flow rate is a carbonator pump. These can be had from any restaurant supply store that deals with used equipment. I got a pump/motor with a 1 gallon stainless tank for $50. Add a small radiator or automotive heater core with a 5" fan ...
by Jerry Biehler
Sun Dec 13, 2009 8:19 am
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum Pump?
Replies: 5
Views: 2515

Re: Vacuum Pump?

Its a stainless steel water circulation pump. Spendy pump if you need it.
by Jerry Biehler
Sun Dec 13, 2009 8:17 am
Forum: Vacuum Technology (& FAQs)
Topic: Diffusion Pump Troubles
Replies: 25
Views: 6306

Re: Diffusion Pump Troubles

<t>All the cooling lines in my system are copper and I got diatoms in no time flat. Maybe you have more acidic water than I do and its pulling some of the copper ions from the tube. Maybe add a touch of copper sulfate. They use that as an algaecide in stock ponds.<br/> <br/> Copper is a great way to...
by Jerry Biehler
Sat Dec 12, 2009 3:52 am
Forum: Vacuum Technology (& FAQs)
Topic: Diffusion Pump Troubles
Replies: 25
Views: 6306

Re: Diffusion Pump Troubles

<t>I have a 6" Technic pump that is water cooled. It wants, I think, .5 gpm. I use something like a TIG cooler to cool it and I am getting down to below 2x10^-10 (X-ray limit) in my chamber using Vacoil S. I have played with the flow amount and it seems to be as long as the walls of the pump are coo...