Where's the current list of stuff available?? Thanks.
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On Mon, Feb 21, 2011 at 9:03 PM, Ken <atm_ken_hunter@...> wrote:
?
It's been a while since we've had any activity on the Group. Should I shut it down?
Anyone interested in the rest of my stuff? Pumps, baseplate, valves, gauges, ION tubes, Gauge controllers, etc.
I am for sure getting rid of my vacuum stuff and if there's no interest, this stuff is going on eBay.
Ken Hunter
-- 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
|
Hi,
?
I dont use this group much, but I have had some
really useful information in the past - so dont shut it down. My interest in
vacuum stems from power cable manufacturing processes. I have been much involved
in the drying & impregnation of paper cables with insulating?media. I
was also involved in the maintainace of the pumping systems and also locating
leaks on the equipment with an Edwards mass spec leak detector. Manufacturing
industry in the uk seems to have gone down?hill recently and my present
employment doesn't involve vacuum work (mores the pity).
?
keep up the good work
?
James
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----- Original Message -----
Sent: Tuesday, February 22, 2011 4:03
AM
Subject: [VacuumX] Anybody home?
?
It's been a while since we've had any activity on the Group. Should I shut
it down?
Anyone interested in the rest of my stuff? Pumps, baseplate,
valves, gauges, ION tubes, Gauge controllers, etc.
I am for sure
getting rid of my vacuum stuff and if there's no interest, this stuff is going
on eBay.
Ken Hunter
|
Aurigema, Andrew N. (KSC-ASRC-474)[ASRC AEROSPACE CORP]
Ken, ? With the demise of the Space program ( for reasons unknown to any of us in it ) I have been really hitting the mirror business.? I now have full up production capability for foam glass fusion mirrors up to 0.65 meter ( 25 inch ) that weigh around 22 pounds. ??I do it all at my hanger factory.? I just got a batch of mirrors thru figure and ready for aluminizing so ?plan to fire up the chamber soon.? I have all the upgrades made to try out overcoating so maybe I will get it to work this time.? ? Drew in sunny Florida ?
|
On 22/02/11 22:55, Thomas Janstrom wrote:
Hi Ken,
Just plain been too busy with other things, like college.... Most of my
life is now back in boxes so I can keep my focus where it needs to be,
on my books.
Still able to run this group so long as traffic stay nice and low <grin>
actually I was wondering why it was so quite just the other day, but at
the time I was on my way to a chem 101 lecture so couldn't do much about
it and after it just slipped my mind.
Just to keep the activity up why don't we all just spend a moment and
tell each other what we've all been up to?
I'm happy to go first: late last year I decided to go back to college
and study biomedical science, which is now keeping me very busy, maybe a
mite too busy, but what can I do? Apparently it gets easier to manage
the further into the course you get so I just have to stick with it a
while longer and it should all be sweet.
So what's everyone else up to?
I was interested in vacuum molding of plastic, and varnish impregnation of transformers. I got a general interest in making mirrors and optic things too.
|
Hi Ken,
Just plain been too busy with other things, like college.... Most of
my life is now back in boxes so I can keep my focus where it needs
to be, on my books.
Still able to run this group so long as traffic stay nice and low
actually I was wondering why it was so quite just the
other day, but at the time I was on my way to a chem 101 lecture so
couldn't do much about it and after it just slipped my mind.
Just to keep the activity up why don't we all just spend a moment
and tell each other what we've all been up to?
I'm happy to go first: late last year I decided to go back to
college and study biomedical science, which is now keeping me very
busy, maybe a mite too busy, but what can I do? Apparently it gets
easier to manage the further into the course you get so I just have
to stick with it a while longer and it should all be sweet.
So what's everyone else up to?
Cheers, Thomas.
On 22/02/2011 2:03 PM, Ken wrote:
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Show quoted text
?
It's been a while since we've had any activity on the
Group. Should I shut it down?
Anyone interested in the rest of my stuff? Pumps,
baseplate, valves, gauges, ION tubes, Gauge controllers,
etc.
I am for sure getting rid of my vacuum stuff and if
there's no interest, this stuff is going on eBay.
Ken Hunter
|
Ken, What sort of mechanical pump do you have? and do you have any oil for one?
? Guy Brandenburg, Washington, DC? ============================
From: Zafar Iqbal
To: vacuumx@...
Sent: Tue, February 22, 2011 2:28:57 AM
Subject: RE: [VacuumX] Anybody home?
?
Please do not close the group.? This is the only stage where wone can get basic to advance knowledge on vacuum
Regards
Zafar Iqbal
To: VacuumX@... From: christopher.k.erickson@... Date: Mon, 21 Feb 2011 18:25:19 -1000 Subject: RE: [VacuumX] Anybody home?
?
Don't shut the group down! If you don't want it, transfer
ownership to me!
It is the only forum on vacuum technology that I have found
anyplace.
-Christopher Erickson
Telecom Engineer
Waikoloa, HI 96738, N19°57' W155°47'
16" f10 Meade LX200GPS SCT
10" f3.8 Newt, Losmandy G-11 & Autostar 497
120ED f8 Orion, Vixen GP-DX & Autostar 497
5" f8 SCT Meade, iOptron Cube Pro
80ED f8 Orion, Vixen GP & Autostar 497
> -----Original Message-----
> From: VacuumX@...
> [mailto: VacuumX@...] On Behalf Of Ken
> Sent: Monday, February 21, 2011 6:04 PM
> To: VacuumX@...
> Subject: [VacuumX] Anybody home?
>
> It's been a while since we've had any activity on the Group.
> Should I shut it down?
>
> Anyone interested in the rest of my stuff? Pumps, baseplate,
> valves, gauges, ION tubes, Gauge controllers, etc.
>
> I am for sure getting rid of my vacuum stuff and if there's
> no interest, this stuff is going on eBay.
>
> Ken Hunter
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
|
Please don't shut it down. I learned something on it recently that made aluminizing mirrors with our old surplus vacuum chamber much, much easier.
?
Guy Brandenburg, Washington, DC? ============================
From: Russell Shaw
To: VacuumX@...
Sent: Tue, February 22, 2011 4:22:19 AM
Subject: Re: [VacuumX] Anybody home?
?
On 22/02/11 15:03, Ken wrote:
> It's been a while since we've had any activity on the Group. Should I shut it down?
>
> Anyone interested in the rest of my stuff? Pumps, baseplate, valves, gauges, ION tubes, Gauge controllers, etc.
>
> I am for sure getting rid of my vacuum stuff and if there's no interest, this stuff is going on eBay.
I haven't done any vacuum stuff yet because i'm too busy. I like to have this
group to use later on though. I'll try and store away any unwanted vacuum gear
but i'm probably a long way away.
|
On 22/02/11 15:03, Ken wrote: It's been a while since we've had any activity on the Group. Should I shut it down?
Anyone interested in the rest of my stuff? Pumps, baseplate, valves, gauges, ION tubes, Gauge controllers, etc.
I am for sure getting rid of my vacuum stuff and if there's no interest, this stuff is going on eBay. I haven't done any vacuum stuff yet because i'm too busy. I like to have this group to use later on though. I'll try and store away any unwanted vacuum gear but i'm probably a long way away.
|
Please do not close the group.? This is the only stage where wone can get basic to advance knowledge on vacuum Regards Zafar Iqbal
To: VacuumX@... From: christopher.k.erickson@... Date: Mon, 21 Feb 2011 18:25:19 -1000 Subject: RE: [VacuumX] Anybody home?
?
Don't shut the group down! If you don't want it, transfer
ownership to me!
It is the only forum on vacuum technology that I have found
anyplace.
-Christopher Erickson
Telecom Engineer
Waikoloa, HI 96738, N19°57' W155°47'
16" f10 Meade LX200GPS SCT
10" f3.8 Newt, Losmandy G-11 & Autostar 497
120ED f8 Orion, Vixen GP-DX & Autostar 497
5" f8 SCT Meade, iOptron Cube Pro
80ED f8 Orion, Vixen GP & Autostar 497
www.data-plumber.com
www.roboscope.net
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Show quoted text
> -----Original Message-----
> From: VacuumX@...
> [mailto: VacuumX@...] On Behalf Of Ken
> Sent: Monday, February 21, 2011 6:04 PM
> To: VacuumX@...
> Subject: [VacuumX] Anybody home?
>
> It's been a while since we've had any activity on the Group.
> Should I shut it down?
>
> Anyone interested in the rest of my stuff? Pumps, baseplate,
> valves, gauges, ION tubes, Gauge controllers, etc.
>
> I am for sure getting rid of my vacuum stuff and if there's
> no interest, this stuff is going on eBay.
>
> Ken Hunter
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
|
Please dont shut the group down.
?
Ali Khan
Lahore Pakistan
|
--- On Tue, 22/2/11, Ken wrote:
From: Ken
Subject: [VacuumX] Anybody home?
To: VacuumX@...
Date: Tuesday, 22 February, 2011, 9:03
?
It's been a while since we've had any activity on the Group. Should I shut it down?
Anyone interested in the rest of my stuff? Pumps, baseplate, valves, gauges, ION tubes, Gauge controllers, etc.
I am for sure getting rid of my vacuum stuff and if there's no interest, this stuff is going on eBay.
Ken Hunter
|
Don't shut the group down! If you don't want it, transfer
ownership to me!
It is the only forum on vacuum technology that I have found
anyplace.
-Christopher Erickson
Telecom Engineer
Waikoloa, HI 96738, N19°57' W155°47'
16" f10 Meade LX200GPS SCT
10" f3.8 Newt, Losmandy G-11 & Autostar 497
120ED f8 Orion, Vixen GP-DX & Autostar 497
5" f8 SCT Meade, iOptron Cube Pro
80ED f8 Orion, Vixen GP & Autostar 497
www.data-plumber.com
www.roboscope.net
toggle quoted message
Show quoted text
-----Original Message-----
From: VacuumX@...
[mailto:VacuumX@...] On Behalf Of Ken
Sent: Monday, February 21, 2011 6:04 PM
To: VacuumX@...
Subject: [VacuumX] Anybody home?
It's been a while since we've had any activity on the Group.
Should I shut it down?
Anyone interested in the rest of my stuff? Pumps, baseplate,
valves, gauges, ION tubes, Gauge controllers, etc.
I am for sure getting rid of my vacuum stuff and if there's
no interest, this stuff is going on eBay.
Ken Hunter
------------------------------------
Yahoo! Groups Links
|
It's been a while since we've had any activity on the Group. Should I shut it down?
Anyone interested in the rest of my stuff? Pumps, baseplate, valves, gauges, ION tubes, Gauge controllers, etc.
I am for sure getting rid of my vacuum stuff and if there's no interest, this stuff is going on eBay.
Ken Hunter
|
Re: Simplest coating system possible?
It might be worth a call to the University of Hawaii’s thin film lab - . If nothing else a chance to tour and look at the equipment will give you a better feel for what you’re up against. You might get lucky and run into a fellow enthusiast… ? David A. Grove Senior Research Engineer Luxel Corp. ? A good politician is like a good football coach. He has to be smart enough to do a good job but dumb enough to think it matters. ?
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From: VacuumX@... [mailto:VacuumX@...] On Behalf Of Christopher Erickson
Sent: Monday, January 24, 2011 1:09 PM
To: VacuumX@...
Subject: RE: [VacuumX] Re: Simplest coating system possible?? ? Right now I think that my calculations put me someplace
between $20,000 and $50,000. I don’t think many people
are going to be prepared to share a meaningful percentage
of that investment.
-Christopher Erickson
Telecom Engineer
Waikoloa, HI 96738, N19°57' W155°47'
16" f10 Meade LX200GPS SCT
10" f3.8 Newt, Losmandy G-11 & Autostar 497
120ED f8 Orion, Vixen GP-DX & Autostar 497
5" f8 SCT Meade, iOptron Cube Pro
80ED f8 Orion, Vixen GP & Autostar 497
www.data-plumber.com
www.roboscope.net
> -----Original Message-----
> From: VacuumX@...
> [mailto:VacuumX@...] On Behalf Of startestisbest
> Sent: Monday, January 24, 2011 10:59 AM
> To: VacuumX@...
> Subject: [VacuumX] Re: Simplest coating system possible?
>
> Chris,
> Maybe we just need to build a coating system to be shared by
> all of us on the big island? I saw the posts quote from $8000
> up to tens of thousands for the needed equipment. Maybe if we
> look around for cheap components and share the costs and do
> the work, we could really do this for a reasonable cost to
> each? I would be willing to chip in a grand or so myself.
>
> Mike
>
> --- In VacuumX@..., "Christopher Erickson"
> wrote:
> >
> > I have been doing the numbers and trying to decide if I
> > want to build a 1.3 meter coating chamber here on the Big
> > Island.
> >
> > Doing the financial math, a 1.3M chamber appears to only
> > be about 40% more expensive than building a .5M chamber
> > and would be quite a bit more versatile.
> >
> > The only real problem is whether or not people would be
> > willing to pay to ship their heavy, bulky 1M mirrors to
> > Hawaii to be coated.
> >
> > On a related note, if anyone has any spare vacuum
> > hardware/instrumentation suitable for a 1.3M chamber
> > that they are interested in selling at reasonable
> > prices, I am interested to hear about it.
> >
> > In discussions with some of my buddies with engineering
> > day jobs at the observatories, I am tempted to try some
> > silver coatings as well as aluminum.
> >
> > I am also interested in getting into overcoatings once
> > I have aluminizing and silvering down to a nicely
> > repeatable science.
> >
> > Given your corrosive vog challenges and need for
> > frequent coatings anyway, maybe switching to silvering
> > might be an option for better optical performance
> > between recoatings.
> >
> > Of course all of this means you are going to have to
> > quit trying to claim that HOVE is astronomically
> > superior to Waikoloa Village here on the island...
> >
> > (grin)
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
|
Re: Simplest coating system possible?
Right now I think that my calculations put me someplace
between $20,000 and $50,000. I don’t think many people
are going to be prepared to share a meaningful percentage
of that investment.
-Christopher Erickson
Telecom Engineer
Waikoloa, HI 96738, N19°57' W155°47'
16" f10 Meade LX200GPS SCT
10" f3.8 Newt, Losmandy G-11 & Autostar 497
120ED f8 Orion, Vixen GP-DX & Autostar 497
5" f8 SCT Meade, iOptron Cube Pro
80ED f8 Orion, Vixen GP & Autostar 497
www.data-plumber.com
www.roboscope.net
toggle quoted message
Show quoted text
-----Original Message-----
From: VacuumX@...
[mailto:VacuumX@...] On Behalf Of startestisbest
Sent: Monday, January 24, 2011 10:59 AM
To: VacuumX@...
Subject: [VacuumX] Re: Simplest coating system possible?
Chris,
Maybe we just need to build a coating system to be shared by
all of us on the big island? I saw the posts quote from $8000
up to tens of thousands for the needed equipment. Maybe if we
look around for cheap components and share the costs and do
the work, we could really do this for a reasonable cost to
each? I would be willing to chip in a grand or so myself.
Mike
--- In VacuumX@..., "Christopher Erickson"
<christopher.k.erickson@...> wrote:
I have been doing the numbers and trying to decide if I
want to build a 1.3 meter coating chamber here on the Big
Island.
Doing the financial math, a 1.3M chamber appears to only
be about 40% more expensive than building a .5M chamber
and would be quite a bit more versatile.
The only real problem is whether or not people would be
willing to pay to ship their heavy, bulky 1M mirrors to
Hawaii to be coated.
On a related note, if anyone has any spare vacuum
hardware/instrumentation suitable for a 1.3M chamber
that they are interested in selling at reasonable
prices, I am interested to hear about it.
In discussions with some of my buddies with engineering
day jobs at the observatories, I am tempted to try some
silver coatings as well as aluminum.
I am also interested in getting into overcoatings once
I have aluminizing and silvering down to a nicely
repeatable science.
Given your corrosive vog challenges and need for
frequent coatings anyway, maybe switching to silvering
might be an option for better optical performance
between recoatings.
Of course all of this means you are going to have to
quit trying to claim that HOVE is astronomically
superior to Waikoloa Village here on the island...
(grin)
------------------------------------
Yahoo! Groups Links
|
Re: Simplest coating system possible?
Chris,
Maybe we just need to build a coating system to be shared by all of us on the big island? I saw the posts quote from $8000 up to tens of thousands for the needed equipment. Maybe if we look around for cheap components and share the costs and do the work, we could really do this for a reasonable cost to each? I would be willing to chip in a grand or so myself.
Mike
toggle quoted message
Show quoted text
--- In VacuumX@..., "Christopher Erickson" <christopher.k.erickson@...> wrote:
I have been doing the numbers and trying to decide if I
want to build a 1.3 meter coating chamber here on the Big
Island.
Doing the financial math, a 1.3M chamber appears to only
be about 40% more expensive than building a .5M chamber
and would be quite a bit more versatile.
The only real problem is whether or not people would be
willing to pay to ship their heavy, bulky 1M mirrors to
Hawaii to be coated.
On a related note, if anyone has any spare vacuum
hardware/instrumentation suitable for a 1.3M chamber
that they are interested in selling at reasonable
prices, I am interested to hear about it.
In discussions with some of my buddies with engineering
day jobs at the observatories, I am tempted to try some
silver coatings as well as aluminum.
I am also interested in getting into overcoatings once
I have aluminizing and silvering down to a nicely
repeatable science.
Given your corrosive vog challenges and need for
frequent coatings anyway, maybe switching to silvering
might be an option for better optical performance
between recoatings.
Of course all of this means you are going to have to
quit trying to claim that HOVE is astronomically
superior to Waikoloa Village here on the island...
(grin)
|
Well, my scope is a truss style Newtonian, all open. Your approach would mean building a whole new airtight N2 sealed telescope... or at least optically sealing the primary mirror. Due to cost and weight issues, probably not on my "to do" list anytime soon!
The vog and SO2 in Hawaii has increased dramatically since the 2008 Halemaumau eruption. Most of the time during normal trade wind weather the vog will collect over the whole Kona side of the big island, so thick that it reduces visibility to like the worst smog days in LA. The vog tends to dissipate and diffuse away towards Waikoloa and the northern parts of the island, and is concentrated in streams as it passes by the southern end of the island, so these areas have highly variable vog conditions.
I suspect my coating issues are primarily caused by infrequent but intense vog episodes, where a highly concentrated cloud or stream passes right over my location. Most of the time the vog is very light and I do not believe it would cause the problems I am experiencing on a regular basis, since I am usually in the NE trade wind flow blowing the corrosives beyond me to Kona.
I do try to keep my mirror tightly covered with a close fitting metal cover when not in use. This may avoid the problems I have experienced before with these occasional vog clouds. Time will tell.
Mike
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--- In VacuumX@..., Russ Thornton <rocky_beech@...> wrote:
Just a thought. I have not heard this discussed before here or maybe I just
missed it. I know that you guys want just the purest optics possible so this
idea may make you gag but I work at Cape Canaveral and they have
some pretty impressive optics there. I believe that some of their solutions to
the corrosion are to mount a flat glass over the opening and understanding that
the rest of the tube is sealed flood the chamber with nitrogen or some other
inert cheap gas. Is that a workable solution for you?
Russell
|
Just a thought. I have not heard this discussed before here or maybe I just
missed it. I know that you guys want just the purest optics possible so this
idea may make you gag but I work at Cape Canaveral and they have
some pretty impressive optics there. I believe that some of their solutions to
the corrosion are to mount a flat glass over the opening and understanding that
the rest of the tube is sealed flood the chamber with nitrogen or some other
inert cheap gas. Is that a workable solution for you?
Russell
|
Re: Simplest coating system possible?
Aurigema, Andrew N. (KSC-ASRC-474)[ASRC AEROSPACE CORP]
Thomas, ? I was worried you got flooded out or something.? How goes down under ??? ? Mike, ? I do have a 1.5 meter vacuum chamber.? I started with a NCR chamber so don’t have a build plan to offer.? The door on a 1.5 meter chamber is no trivial task.? My chamber is ?” thick mild steel but the door is 3/8” thick.? The flange on the door is 2” x 4” solid steel rolled the hard way.? It mates to a similar flange on the chamber.? ?I strongly suggest you start with a factory chamber of some kind and modify it to your needs.? ? If you do get a chamber, you have to pump it down.? I use a Leybold D40 roughing pump with twin 1397 Welch pumps and twin 8” diff pumps.? That was about $15,000 in used and scrounged vacuum stuff that I had to rebuild and custom fit to my chamber.? It still takes me 6 hours to pump down.? If you go with half the system you will add significantly to your pump down time.? I would suggest you find a spare 60 grand somewhere and buy two monster turbo pumps. ??Big diff pumps are bombs if air gets in there for any reason.? ? Please be very very cautious in your material selection and fabrication processes.? Run your chamber many times before you kick in your diff pumps.? Low vacuum is the same as high vacuum from a structural failure perspective.? ? Drew in sunny Florida ? ? ? ? ?
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From: VacuumX@... [mailto:VacuumX@...] On Behalf Of Thomas Janstrom
Sent: Sunday, January 23, 2011 7:18 PM
To: VacuumX@...
Subject: Re: [VacuumX] Simplest coating system possible?? ? Welcome to the group!
The guy you really want to talk to is Drew from Florida, probably about the most similar environment to work in to yours among our members.... I expect your biggest problem will be sourcing parts locally, but nothing that eBay and such can't fix.
Chamber wise there are two main options box style (ala James Lerch (sp?)) or bell jar (maybe look for a large pool filter housing?), pumps Welsh makes good ones that come up on eBay often, and a 6" or bigger diffusion pump should about do the job. The rest is plumbing (copper is easier to work with, but harder to keep clean, stainless steel is harder to work with, but easier to keep clean), and wiring.....
Cheers, Thomas (group mod and part time owner)
On 24/01/2011 9:06 AM, startestisbest wrote: ? Aloha group,
I live on Hawaii's Big Island and exposed to a very corrosive atmosphere (SO2/H2SO4 primarily). My 20" mirror needs recoating very frequently, and I am looking for a cost-effective alternative to constantly shipping it to the mainland coaters. I am not very knowlegable about details of vacuum coating, nor have the time to build, or funds to buy, a sophisticated apparatus.
My question is: Would it be practical to make a "simple" vacuum apparatus to achieve a useable Al coating even if the coating comes out "below commercial standards" due to insufficient vacuum, etc.? That may not be so bad, since I need to recoat it anyway every few months. I would appreciate any advice as to whether such an approach is worth pursuing for my unique situation?
Thank you!
Mike
?
|
Re: Simplest coating system possible?
I have been doing the numbers and trying to decide if I
want to build a 1.3 meter coating chamber here on the Big
Island.
Doing the financial math, a 1.3M chamber appears to only
be about 40% more expensive than building a .5M chamber
and would be quite a bit more versatile.
The only real problem is whether or not people would be
willing to pay to ship their heavy, bulky 1M mirrors to
Hawaii to be coated.
On a related note, if anyone has any spare vacuum
hardware/instrumentation suitable for a 1.3M chamber
that they are interested in selling at reasonable
prices, I am interested to hear about it.
In discussions with some of my buddies with engineering
day jobs at the observatories, I am tempted to try some
silver coatings as well as aluminum.
I am also interested in getting into overcoatings once
I have aluminizing and silvering down to a nicely
repeatable science.
Given your corrosive vog challenges and need for
frequent coatings anyway, maybe switching to silvering
might be an option for better optical performance
between recoatings.
Of course all of this means you are going to have to
quit trying to claim that HOVE is astronomically
superior to Waikoloa Village here on the island...
(grin)
-Christopher Erickson
Telecom Engineer
Waikoloa, HI 96738, N19°57' W155°47'
16" f10 Meade LX200GPS SCT
10" f3.8 Newt, Losmandy G-11 & Autostar 497
120ED f8 Orion, Vixen GP-DX & Autostar 497
5" f8 SCT Meade, iOptron Cube Pro
80ED f8 Orion, Vixen GP & Autostar 497
www.data-plumber.com
www.roboscope.net
toggle quoted message
Show quoted text
-----Original Message-----
From: VacuumX@...
[mailto:VacuumX@...] On Behalf Of startestisbest
Sent: Sunday, January 23, 2011 1:07 PM
To: VacuumX@...
Subject: [VacuumX] Simplest coating system possible?
Aloha group,
I live on Hawaii's Big Island and exposed to a very corrosive
atmosphere (SO2/H2SO4 primarily). My 20" mirror needs
recoating very frequently, and I am looking for a
cost-effective alternative to constantly shipping it to the
mainland coaters. I am not very knowlegable about details of
vacuum coating, nor have the time to build, or funds to buy,
a sophisticated apparatus.
My question is: Would it be practical to make a "simple"
vacuum apparatus to achieve a useable Al coating even if the
coating comes out "below commercial standards" due to
insufficient vacuum, etc.? That may not be so bad, since I
need to recoat it anyway every few months. I would appreciate
any advice as to whether such an approach is worth pursuing
for my unique situation?
Thank you!
Mike
------------------------------------
Yahoo! Groups Links
|
Re: Simplest coating system possible?
Aloha Mike, Evidently you must live down wind of the valcano. I have been to the big Island twice and had a wonderfull time both trips. It is a very interesting place in many ways.
All the coating I have done has been with with boats in a small chamber so I can't be of too much help here but I wish you the best of luck and I hope you find a way to do your own coating.
Roger
|
Nick Andrews
Christopher Erickson
Dave