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Anybody have any nice cheap easy reliable leak/detection methods other than 1. Deduction by logic by compartmentalizig 2. Stethoscope 3. Squirting acetone at suspected joints to see if pressure rises ? Guy Brandenburg Sent from my iPhone so full of hilarious errors... ;-€}}

I'm looking to aluminum/mirror coat art objects. It's a old old Kinney SC-3 that I bought for $700. I need to find high amp plugs that are used as "shorts". I'll have some pictures up soon.

Someone proposed that I investigate how much it would cost, both time and energy, to add on the capacity to do overcoating (i.e silicon monoxide or dioxide or MgFl or whatever) to a late-1960s Electrodynamics corp vacuum chamber with bell jar that right now just does bare aluminum. I know my predecessors tried and failed; they were a lot better at electronics than me. I've looked it up in the past in various printed and online sources dating back to the 1950s and I'll admit I'm intimidated. I don't recall any details though. Sounded like the hardest part is determining when you have the right thickness, and you have to use all kinds of weird and strange tricks do determine that thickness indirectly... Anybody done this? How hard is it? What extra devices did you find that you needed? Thanks so much for your help in the past. (Our chamber has been doing pretty well for a while now.) Guy Brandenburg, Washington, DC http://gfbrandenburg.wordpress.com/ http://home.earthlink.net/~gfbranden/GFB_Home_Page.html ============================

Hello, I have (maybe a dummy ) question to the DP cooling. In many manuals are written about what if the cooling is not sufficient enough. But nowhere I have seen what happends if the coolig is too eccessive. For example, the cooling water flow is too high and the return line water is cold. In my case the inlet temperature of the cooling water is 15 celsius, the return is max. 25 celsius, but often 21-23 celsius. I don't know the water flow , but it is surlely more than 0.15 gpm, which is the reccondended by the manufacturer. I read somewhere if the DP wall is too cold, than the oil cannot flow back enough fast and that slows the punping speed and lowers the fluid level in the pump. So if I overcool my DP, what happens? Slower pumping speed, at gas load, slower pump down and/or higher base pressure, cannot reach the ultimate pressure of the system? Any comments? Regards Attila

I was wondering if anyone here knows anything about this pump I can not identify it?<br><br>Monroe King

Hi Does someone know how to repair a Alcatel 2004A pomp. regards Paul

http://www.integ.ca/hcml/qbcqn/qszb/uhs/crut/dptg/jczv.htm Best regards, ed ward

http://yogapagina.nl/google_api.php?lgufvk792oimsu rocky_beech Russ Thornton **** Come, let us hasten to a higher plane, Where dyads tread the fairy fields of Venn, Their indices bedecked from one to n, Commingled in an endless Markov chain -- Stanislaw Lem (Cyberiad) %

http://yogapagina.nl/google_api.php?lgufvk792oimsu rocky_beech Russ Thornton **** Come, let us hasten to a higher plane, Where dyads tread the fairy fields of Venn, Their indices bedecked from one to n, Commingled in an endless Markov chain -- Stanislaw Lem (Cyberiad) %

Here is my writeup on how to aluminize mirrors using our setup. No photos yet. Any comments welcome. Guy Brandenburg, Washington, DC http://gfbrandenburg.wordpress.com/ http://home.earthlink.net/~gfbranden/GFB_Home_Page.html ============================

Hi, I am in search of the doc & shematics of the Diavac Penning & Pirani Jauge CT-2P & PT-9P. Does spmebody have it ? Thanks in advance, Charles Rydel

Where do y'all get your flexible vacuum hoses from these days?

I decided to provide information that may be some help to someone. I recently purchased a Granville Phillips 260 ion gauge controller for very cheap from Ebay; when tested the filament would not engage. The instruction manual was down loaded from Ideal Vacuum : http://www.idealvac.com/manuals.asp Looking at FIG 4-3 Q8 drives the magnetic latching relay K3 when closed applies power to the filament. C2 stores energy so that when momentary switch S2 is engaged; C2 keeps Q* turned on long enough to allow time for the relay to latch. C2 in my case was weak; when it was replaced the filament circuit worked. The controller was tested with my diffusion pump system more or less agreeing with my old CVC controller.

Hello, does anyone have any information about the Edwards ED200 vacuum pump please. I'd like a manual, instructions, any information I can get please. Thank you, Don Black.

I am a baby boomer retired in my late 60's. When I was in high school I was experimenting with refrigerator rotary pumps as described by Strong in the Amateur Scientist articles. As a senior in high school I learned to blow Pyrex glass; during college in undergraduate and graduate I worked with vacuums systems but mostly for building Argon ion and N2 lasers. I did some diffusion pump work but very briefly. I remember using gum rubber tubing, stop cock valves, and Pyrex glass tube connections. Afterward I haven't touched vacuum systems until 2003 ( fired up my diffusion pump) but very briefly; and recently much more. I have always had a love for vacuum systems. But my vacuum world has changed significantly with quick disconnect etc. I feel like Rip Van.. Having limited funding I looked to Ebay for getting components that I could afford. I have been slowly acquiring KF fittings for future use. In the meantime I am using what I know to get by with. "Procedures in Experimental Physics " Strong has been my Bible. I have acquired more recent Varian training manuals; info from Bell Jar; etc. When I was in College McLeod gauges were used for reference; now I have very limited vacuum references; the gas discharge method; the TC gauge and Ion gauge method. The first method is very dangerous in the 10 micron and below: http://vaughns_page.50webs.com/vacuum/gas_discharge1/X-ray1/x-ray_gas_tube1.html I have abandoned this method; in the future I have some high voltage experiments in mind: http://vaughns_page.50webs.com/vacuum/magnetron/9Jan13Exp/9jan13Exp.pdf . The TC gauge is limited but I am mainly interested in some ball park idea; I have purchased several DV-6M types new and used; I can used the hysteresis factory data to get some reference but how do I know if is new that some oil back streaming hasn't changed or shifted the thermodynamic continuity flow equilibrium much less the non linear characteristics? When I started testing my diffusion pumps the TC controller would quickly peg below zero; I started zeroing my TC controllers using the diffusion pumps. At the moment I feel like I am working in the dark. Even if I were to use a calibrated TC gauge; how do I know mechanical and diffusion pump back streaming won't significantly affect its thermodynamics significantly?? Thanks

I decided to test my Veeco diffusion pump using the 1402 that I have just refurbished. At the present I am using my Web site for documenting my experiments, which I don't mind sharing; it is very convenient for me; decided to share photos of my experimental setup. The following link shows a photo of the 1402 backing the DP: http://vaughns_page.50webs.com/vacuum/1402Ebay_2/Veeco_EP_2A_1/100_1701b.JPG I don't have yet any 2" vacuum pluming; attached to the top is a quick adapter for the TC and ion gauge tube to sample the pressure. I plan to have something more suitable in the future. The ion gauge should be rotated 90 degrees; the tungsten heater is drooping slightly which I understand affects its sensitivity value. The next link shows the TC gauge that was zeroed after the DP reached 0.1 micron. http://vaughns_page.50webs.com/vacuum/1402Ebay_2/Veeco_EP_2A_1/100_1700b.JPG The next link shows the CVC ion gauge controller; http://vaughns_page.50webs.com/vacuum/1402Ebay_2/Veeco_EP_2A_1/100_1702b.JPG The emission current is 1 ma. corresponding to slightly higher than 0.02 micron reading. At 10 ma. the pressure settles to about 0.06 micron; as expected higher than that at 1 ma. I believe this is due to enhanced electron space charge cloud. I got two of these for very cheap; I wanted something very basic to learn from; I was able to fine the manual with schematics on the Web; before using, the emission current and electrometer were checked ( using my DVMs) for calibration. I was very surprised after so many years how close to calibration they were. The last link shows the DP that I modified for the cooling fan I found in my junk box: http://vaughns_page.50webs.com/vacuum/1402Ebay_2/Veeco_EP_2A_1/100_1703b.JPG Having no information regarding this DP; I decided to try using about 70 cc of the Specialty Fluid 704 equivalent ( at the time it was the cheapest that I could find); The Variac, for the heater, was finally set to 100 VAC corresponding to the above results; don't know for the this fluid type what the optimum Variac setting should be. Regarding the ion gauge reading ( 1 ma. emission) assuming the typical sensitivity value given for ( N2 or air). I do know that I started with air; however what I don't know is what the ion gauge is ionizing ( out gas ; back streaming etc); Out gassing in the ion gauge itself; I didn't do much degassing yet. I don't know typically how close to the typical sensitivity value given should be trusted. I am a novice getting my feet wet just learning how to drive. My goal is to eventually get down near 10-6 Torr someday for electron beam experiments that I have in mind.

Howdy, I've been a lurker here for some time - came across this recently and thought it might be interesting/useful. While looking for some info on brewing, I found these "tri clover fittings": http://www.brewershardware.com/tri-clover-fittings/ They seem to be standard in brewing/dairy plant, and look very similar to the KF vacuum fittings (genderless flanges, O-ring, and clamp). They're polished for hygenic reasons, so I guess would do well for vacuum. Most importantly they're dirt cheap! Maybe you know about them already, but they're totally new to me (in the UK, where we seem to be behind the times....) Incidentally, no relation to the "tri laser connector" that Bones used to fix Spock's brain ;-) Cheers, Lindsay

I am an experimentalist retired but have some part time contract work to help pay for my toys on a beer budget. I have some personal experiments that I want to try out with my vacuum systems. I am assuming there are others in this group in my situation; decided to provide information that might help others. I have tried finding information regarding repairing Welch vacuum pumps in order to try fixing those bought very cheep on Ebay. Recently I purchased a Welch 1402 pump, with ballast, at a relatively cheep price from Ebay. The pump was very dirty with sludge; it required extensive cleaning; I was forced to take the pump completely apart, including the ballast valve, and wash and clean it throughly. I am not claiming the following procedure is correct; but that it has worked for me. First of all I wish to thank the following link for giving me guidance in fixing my pump: http://www.repairfaq.org/sam/lasercva.htm I decided to try out making my own gaskets using the sheets given in : http://www.mcmaster.com/#catalog/119/3531/=lfnnlm ; I used an Xacto knife to cut out the form for both gaskets required. To reseal the ballast valve I use the information given in: http://www.liberatedmanuals.com/TM-10-4310-391-13-and-P.pdf ; from there I purchased the suggested Loctite 592 Thread Sealant 50ml ~ 59231 from: http://www.ebay.com/itm/200602009141?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 I can't count the number of times I assembled / disassembled the 1402; in reassembling I partially tightened the bolts to allow the vanes to clear the stator without sticking. Finally I tightened them after the vanes seemed properly seated. My pump still wasn't working properly. I noticed bubbles occurring ; fixed it by adjusting and cleaning the valves. Afterward the pump seemed still weak pumping. I decided to flip the vanes each 180 degrees. I was lucky, this fixed my pump; it now pumps very fast; and seems to achieve , with moderately used oil, about 2 Microns as read by my TC gauge ( I zeroed it using a diffusion pump). I am very happy with my pump now. I am hopping this information helps someone in this group

A belt guard, how quaint! -- Nick A "You know what I wish? I wish that all the scum of the world had but a single throat, and I had my hands about it..." Rorschach, 1975 "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."- Benjamin Franklin, Historical Review of Pennsylvania, 1759 "Suburbia is where the developer bulldozes out the trees, then names the streets after them." Bill Vaughan "The price of apathy towards public affairs is to be ruled by evil men." Plato