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Hi friends, I am glad to faind a groop dedicated to the vacuum
technology.
I live in Argentina, and my english is not very good, I hope you
scuse my errors.

My main activity is the rebuilding of catode ray tubes (television
screens)but my hoby is atronomy.

I have the idea of using the front of obsolete cathode ray tubes, as
parabolic mirrow for telescopes.

This front is made of good cuality glass.

How you like the idea?

I am waiting for answers.

Albert Gasparini

-Hi Jeon
The Best (cheapest :>) Glow Discharge transformers are from Neon
signs you can find these on e-Bay for little money I have one 9000v -
35 ma and it seems to work fine. I use a welder to heat the
evaporation tungsten I bought .060 welding electrode tungsten and it
seems to be to large so I need a lot of amperage to get it hot I've
read of other guys using a large battery charger for the power source
and they regulate the 110v side of the charger with a dimmer switch.
I'll try to find the web site for you.

E-Beam now that's ambitious—I have been studying this and not

having a lot of luck in finding the voltage / amperage and coil specs
needed. Sputtering system may be easier to deal with again finding
the source for a high voltage and high amperage source may be
difficult (expensive)Fabricating a Sputtering head seems to be
easier than E-beam.

Good Luck
Keep us posted
Ron

VacuumX@..., "jongmin686" <jongmin686@y...> wrote:

Hi, friends
Hi> I'm starting to build the Vacuum deposition system just with

a CVC

Hi, friends

I'm starting to build the Vacuum deposition system just with a CVC
diffusion pump and a Edwards pump.
Right now , I'm looking for transformers for evaporation and glow
discharge, but Actually I was studing bilody included with insects
such as butterflys, and so I don't have any knowledge related with
electrical power.
Could you tell me which transformer is better or the range of output
current, voltage or watt for evaportion and glow discharge ?

If I can take care of these troubles, Next problem is to find or make
electron beam gun power supply. To find it, I am still watching
ebay'power supplys everyday. Anyway It is not easy.

Good luck everybody,~~!!

Jeon *^,^*

--- In VacuumX@..., "paladinironworks" <PIW@s...> wrote:

Hi all,

I'm still kicking but work has been at a standstill on my chamber.
I'm relocating my shop is my excuse. (That and money).

Les

I understand entirely... All my goodies are in storage somewhere in
Amarillo... I'm at the Days Inn and I can relate to the money thing
too!

Ken

Hi all,

I'm still kicking but work has been at a standstill on my chamber.
I'm relocating my shop is my excuse. (That and money).

Les

--- In VacuumX@..., RON WHITE <ron_white@s...> wrote:

Hi Ken

God I hate moving

When Joanne and I moved here ...

Hi Ron,

Where is here? Do you have any photo's of your chamber?
Put some in the group area and I'll post one as the home
page photo!

Ken Hunter

Hello guys...

Rose and I made it to Amarillo OK, Were staying at the Day's Inn
until we can find something to call home (with a BIG workshop of
course!)...

Don't see much activity on the group these days.

Anybody out there reading this?

Ken

On Fri, 2003-04-25 at 22:12, grantfair2001 wrote:

The pump label specifically warns against the use of any oil
lubricants; wouldn't this include diesel?

You bet!!

I just used google to find out what there is available for information
at they suggest using a Gast solvent ##### (!). It may be useful to
access the website and to contact your closest dealer and get a
recommendation from them. If you are real concerned about things perhaps
you need to ship them the unit for service.

Darald

The pump label specifically warns against the use of any oil
lubricants; wouldn't this include diesel?

Grant

On Fri, 2003-04-25 at 14:01, grantfair2001 wrote:

I phoned a local vacuum pump firm and asked about a solvent to flush a
vacuum pump with carbon vanes. (The pump suggests Loctite Saftey
Solvent which doesn't seem to be made anymore). The lady I spoke to
recommended an automobile product - Brake Kleen.

Would this work for flushing the Gast?

Try 3/4 gallon of diesel with 1 qt of ATF mixed in.

The brake Kleen could be used after this. The diesel mix is a very low
viscosity lubricant.

You could try the diesel mix first and then see how the pump works.

If you are trying for a very very low vacuum then put in some brake
kleen and it will absorb and remove the previous and the inside should
be polished again.

Darald

I phoned a local vacuum pump firm and asked about a solvent to flush a
vacuum pump with carbon vanes. (The pump suggests Loctite Saftey
Solvent which doesn't seem to be made anymore). The lady I spoke to
recommended an automobile product - Brake Kleen.

Would this work for flushing the Gast?

Grant

Thanks for the advice. The motor recommends flushing with a Loctite
fluid as well as mentioning some other things which may be banned by
now. I will check further.

Grant

On Tue, 2003-04-22 at 21:16, grantfair2001 wrote:

Hi Darald - thanks for the reply, it is helpful.

For reasons unknown, the Gast pump started putting out lots of air
recently. It has been running non-stop for several days so maybe
something wore into shape, though the thing was old surplus when I
bought it. Anyway - for now it is working just fine!

Grant

Greetings

I am currently working on a vacuum truck and every 8 to 10 running hours
I flush the pump with a 3:1 mixture of diesel and ATF oil. The ratio
could be different in your application because I have problems with
internal grease deposition that you should not have. Check with a Gast
vacuum pump distributor as to recommended practice. This process may not
apply to a high accuracy pump but is used regularly on vacuum trucks in
this area.

The flushing is to lubricate (and clean) the inside of the pump.

Darald

Thanks Ken -

They did not have any Gast kits, are the names they use "generic"?

And if those are cheap prices, what are the expensive ones like? <g>

Anyway, my pump inexplicably started pumping more air recently, so for
now I don't need to improve it.

Good luck with your upcoming move.

If I have trouble with the pump in the future I will be back to the list.

Grant

Hi Darald - thanks for the reply, it is helpful.

For reasons unknown, the Gast pump started putting out lots of air
recently. It has been running non-stop for several days so maybe
something wore into shape, though the thing was old surplus when I
bought it. Anyway - for now it is working just fine!

Grant

My project is the gradual restoration of an old, (~1960 I'm
guessing)
Kinney vacuum coater, (Type SC-3).
The system is based on a 2" diffusion pump, 12" dia X 12" tall bell
jar, and a Sargent-Welch 1403 roughing pump.

To date, my progress has been to disassemble and clean up the
diffusion pump. It had the appearance and smell on the inside of
being a crude oil cracking apparatus. I used oven cleaner, (not
wanting to mess with hot lye solutions) followed by distilled water
and then acetone to clean it up. I replaced all the seals with new
Viton O rings. I cleaned up and changed the oil in the roughing pump
which seems to be in very good condition.

At this point I decided to see were I stood with the system. Without
further disassembly and cleaning, (I was worried about the condition
of the rubber diaphragms in the various diaphragm valves, the outside
edges look cracked, but I didn't want to mess with them unless I
had
to), I started roughing down the system.

I think it went surprisingly well for such and old piece of
equipment. I was able to get the system down to about 10^-2 torr,
which surprised me because as far as I can tell the 1403 roughing
pump is a one stage pump and I wouldn't expect it to get much
below 1
torr. The pressure was monitored using a Stokes McLeod gauge. One of
the three installed thermocouple gauges seemed to be functioning. I
suspect that the other two gauge tubes, (Type 531) are not working.
The discharge gauge, which I'm assuming was installed in the bell
jar
base plate, because there was a vacant hole, is missing. My guess it
was a cold cathode ion gauge. I have a Kinney type KDG gauge head a
Varian 524-2 gauge head and a NRC type 507 ionization gauge sitting
in a box of parts I got with the system, along with a CVC Autovac
3294A gauge controller and a NRC 724 Gauge controller. Which gauge
head goes with which controller I am not at all certain. I also
picked up a Bendix (CVC?) GP-310 Pirani gauge controller with no
sensor head at the MIT flea marker Sunday just because it was sitting
there for $10.

The immediate questions I have concern the next step. I feel that I
am in the pressure realm that I can consider turning on the diffusion
pump. Initiayl I charged the diffusion pump with an unknown silicon
oil that I removed from an old 4" CVC system that I have waiting for
possible restoration. Then I got to thinking that this old Kinney
system was probably designed for a hydrocarbon diffusion oil and the
heater came into question. The heater is a Chromalox HSP 31, 115V,
100W disc heater. There is no controller or thermostat on the heater
nor anyway to measure the heater temperature. What diffusion pump oil
should I use? I might add that there seems to be no baffle between
the diffusion pump and the bell jar, just a gate valve.
Intrumentation. What sensor head goes with what controller? A cheap
source of type 531 T/C gauge heads. The same for a Pirani type GP-003
sensor tube. Does anyone have any recollection of this Kinney system?
This is a "back burner" type of project, going slow as I collect
information and pieces.

My interest in vacuum coating has to do with small acoustical sensors
and sources. For example, I am currently working on a miniature
electrostatic sound source which incorporates a slightly conductive
very thin, (~.00006 inch) Mylar diaphragm and perforated thin metal
stators. Currently I am making the diaphragms "conductive", (about
10K ohms over 1") by applying powdered graphite to them. They work,
but this doesn't seem very elegant or controllable. If I get the
vacuum coating system running, my next series of questions may be
concerning how to conductively coat mylar without melting it,
(radiating heat). The Kinney system is also set up with carbon
coating capabilities. Also, because these electrostatic sources I am
working on are to be used in a very high magnetic field, (MRI) I have
a need to minimize metal in their construction, (eddy currents), so a
metalized stator might have advantages. Envisioned future uses for
vacuum coating might concern capacitance micro phones, again
metalized diaphragms and stators, and plasma clean/etching sounds
interesting because I am forever trying to adhesively bond polar
polymers, (nylon, Delrin, polyethelene, Teflon, etc)

Thanks for any guidance

ExpTec
DBA Experimental Technique