silvering (was Re: [VacuumX] Anybody still alive?
I tried an experiment with spray silvering vs aluminizing. The two methods seem to produce equivalent results, but you have to clean the mirror more carefully with the silvering method.
Writeup is here, starting on page 2.
Guy Brandenburg Washington, DC
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On 6/16/21 10:46 AM, russell shaw wrote: On 16/6/21 4:55 pm, Christopher Erickson wrote:
Still here... Stll here
Didn't get the original message Neither did I, oddly. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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On 16/6/21 4:55 pm, Christopher Erickson wrote: Still here... Stll here Didn't get the original message
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On 6/16/21 10:22 AM, eosraptor1 wrote: You still up there in the?frozen north :_)))) Yup! Ever see our mutual Britt bud ???? ? All the time! In fact I'll be seeing him again tomorrow. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Dave
You still up there in the?frozen north :_))))? ? Ever see our mutual Britt bud ???? ?
On Wed, Jun 16, 2021 at 9:55 AM Dave McGuire < mcguire@...> wrote:
? Hey Drew!? It's good to see your email address in my inbox. :-)
? ? ? ? ? ? ?-Dave
On 6/16/21 9:52 AM, eosraptor1 wrote:
> I still here in sunny FLA.??
>
> On Wed, Jun 16, 2021 at 9:48 AM Dave McGuire <mcguire@...
> <mailto:mcguire@...>> wrote:
>
>
>? ? ?? Yup, still breathing!
>
>? ? ?? ? ? ? -Dave
>
>? ? ?On 6/16/21 2:55 AM, Christopher Erickson wrote:
>? ? ?> Still here...
>? ? ?>
>? ? ?> /"My advice is always free and worth every penny!"/
>? ? ?> /
>? ? ?> /
>? ? ?> /-Christopher Erickson/
>? ? ?> /Observatory Engineer/
>? ? ?> /Summit Kinetics/
>? ? ?> /Waikoloa, Hawaii/
>? ? ?>
>? ? ?>
>? ? ?>
>? ? ?<>
>? ? ?>? ? ? ?Virus-free. <>
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>? ? ?<>
>? ? ?>
>? ? ?>
>? ? ?> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>? ? ?>
>? ? ?> On Tue, Jun 15, 2021 at 8:50 PM Steve Vladimir via
>? ? ?<>
>? ? ?> <> <astro_optics=[email protected]
>? ? ?<mailto:[email protected]>
>? ? ?> <mailto:[email protected] <mailto:[email protected]>>>
>? ? ?wrote:
>? ? ?>
>? ? ?>? ? ?*Still here....*
>? ? ?>
>? ? ?>
>
>
>? ? ?--
>? ? ?Dave McGuire, AK4HZ
>? ? ?New Kensington, PA
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--
Dave McGuire, AK4HZ
New Kensington, PA
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Hey Drew! It's good to see your email address in my inbox. :-)
-Dave
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On 6/16/21 9:52 AM, eosraptor1 wrote: I still here in sunny FLA.??
On Wed, Jun 16, 2021 at 9:48 AM Dave McGuire <mcguire@...
<mailto:mcguire@...>> wrote:
? Yup, still breathing!
? ? ? ? -Dave
On 6/16/21 2:55 AM, Christopher Erickson wrote:
> Still here...
>
> /"My advice is always free and worth every penny!"/
> /
> /
> /-Christopher Erickson/
> /Observatory Engineer/
> /Summit Kinetics/
> /Waikoloa, Hawaii/
>
>
>
<>
>? ? ? ?Virus-free. www.avg.com <>
>
<>
>
>
> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>
> On Tue, Jun 15, 2021 at 8:50 PM Steve Vladimir via groups.io
<>
> <> <astro_optics@...
<mailto:[email protected]>
> <mailto:[email protected] <mailto:[email protected]>>>
wrote:
>
>? ? ?*Still here....*
>
>
--
Dave McGuire, AK4HZ
New Kensington, PA
--
Dave McGuire, AK4HZ
New Kensington, PA
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I still here in sunny FLA.??
On Wed, Jun 16, 2021 at 9:48 AM Dave McGuire < mcguire@...> wrote:
? Yup, still breathing!
? ? ? ? -Dave
On 6/16/21 2:55 AM, Christopher Erickson wrote:
> Still here...
>
> /"My advice is always free and worth every penny!"/
> /
> /
> /-Christopher Erickson/
> /Observatory Engineer/
> /Summit Kinetics/
> /Waikoloa, Hawaii/
>
>
> <>
>? ? ? ?Virus-free.
> <>
>
>
> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>
> On Tue, Jun 15, 2021 at 8:50 PM Steve Vladimir via
> <> <astro_optics=[email protected]
> <mailto:[email protected]>> wrote:
>
>? ? ?*Still here....*
>
>
--
Dave McGuire, AK4HZ
New Kensington, PA
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Yup, still breathing!
-Dave
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Show quoted text
On 6/16/21 2:55 AM, Christopher Erickson wrote: Still here...
/"My advice is always free and worth every penny!"/
/
/
/-Christopher Erickson/
/Observatory Engineer/
/Summit Kinetics/
/Waikoloa, Hawaii/
<>
Virus-free. www.avg.com
<>
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
On Tue, Jun 15, 2021 at 8:50 PM Steve Vladimir via groups.io
<> <astro_optics@...
<mailto:[email protected]>> wrote:
*Still here....*
--
Dave McGuire, AK4HZ
New Kensington, PA
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On Wednesday, June 16, 2021, 01:55:51 AM CDT, Christopher Erickson <christopher.k.erickson@...> wrote:
Still here... "My advice is always free and worth every penny!"
-Christopher EricksonObservatory Engineer Summit Kinetics Waikoloa, Hawaii
On Tue, Jun 15, 2021 at 8:50 PM Steve Vladimir via <astro_optics= [email protected]> wrote: Still here....
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Still here... "My advice is always free and worth every penny!"
-Christopher EricksonObservatory Engineer Summit Kinetics Waikoloa, Hawaii
On Tue, Jun 15, 2021 at 8:50 PM Steve Vladimir via <astro_optics= [email protected]> wrote: Still here....
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Doesn't sound like that high of a vacuum then, but lots of variables. What's the governing metric? How precisely do you need to control? What's the limiting budget?
If vacuum level is the metric, there's a pretty good thread using an MPX5100 and an Arduino for vacuum measurement (add a ?if you need environmental feedback). Maybe couple that with a vacuum generator and a proportional solenoid valve?
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This sounds like he is trying to use vacuum to pull a parabola on a sheet ..... for that to work you will need a very sensitive feedback loop that is constantly checking on temperature, local atmospheric pressure, pressure of the vacuum line, and some kind of surface profile feedback.? I tried all that a long time ago and it was just to insense for my DIY skill set.? ?
As far as making a vacuum regulator, you will need to tie in something like a piriani meter or a thermocouple meter to a feedback loop that controls a calibrated leak of some kind.? The trick is that it is all temperature dependant and everything will be changing all the time.??
Drew in sunny FLA??
I? am not in the process of mirror alluminium? ? Only in vacuum? control ? I use a circle? from a byke wheel ? Put a alluminium? sheat? over? and? peut a cover in the back ? Like this? if? <I make? some? vacuum? betting I have? a curve? in the front ? This ?curve? look like a parabole? od near a? Astro mirror But ?not exactly? it is a catenaray? curve? like? the calble over a sdpended? brige ? And ?not usable? for? astronomy? mirror ? But good? for? my? sound? application ? My ?problem is? to control? the vacuum ? I have? some linkage? in the system And ?have to pur some? vacuum contanly ? In ?vapor instrumentation we have? pressure? analog regulator ? Ne electronic? at all Juste ?mechanical ?we have? differential? ajust? integration of error ? But ?that? not work? with ?vacuum ? I seach? for? more? then just a valve ? Is it possible? ??? ? ? Jack 47 71 ? ? ? Can you give a few more details on your chamber/ what you're trying to achieve? Is this a sputtering process?
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I? am not in the process of mirror alluminium? ? Only in vacuum? control ? I use a circle? from a byke wheel ? Put a alluminium? sheat? over? and? peut a cover in the back ? Like this? if? <I make? some? vacuum? betting I have? a curve? in the front ? This ?curve? look like a parabole? od near a? Astro mirror But ?not exactly? it is a catenaray? curve? like? the calble over a sdpended? brige ? And ?not usable? for? astronomy? mirror ? But good? for? my? sound? application ? My ?problem is? to control? the vacuum ? I have? some linkage? in the system And ?have to pur some? vacuum contanly ? In ?vapor instrumentation we have? pressure? analog regulator ? Ne electronic? at all Juste ?mechanical ?we have? differential? ajust? integration of error ? But ?that? not work? with ?vacuum ? I seach? for? more? then just a valve ? Is it possible? ??? ? ? Jack 47 71 ? ? ? Can you give a few more details on your chamber/ what you're trying to achieve? Is this a sputtering process?
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Can you give a few more details on your chamber/ what you're trying to achieve? Is this a sputtering process?
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Turns out I have a 5" diff pump cold trap and plate valve for sale. ?$250 and shipping gets it all. ?
Drew in sunny aFLA
Sent via the Samsung Galaxy Note? II, an AT&T 4G LTE smartphone
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-------- Original message -------- From: jlcampll Date:07/25/2020 4:06 PM (GMT-05:00) Subject: Re: [VacuumX] Anybody still alive?
I had a veeco,?I think it was a v 301 system. 16 inch diameter 36in tall Pyrex chamber. Lifter and everything. Had a lot of fun with it doing science with the neighborhood kids and making some mirrors and?other stuff. It ended up at the Naval Post Graduate school in Monterey.? What I have left is a Precision D25 pump and controller for dual TC and ionization gauges. I have a 12" pyrex desiccator to use as a chamber.?I've got a lathe and mill to make parts to fit things together. I made a diff pump from a propane cylinder long ago. It kinda worked. How much could I get a small diff pump and valve for? Jim
-------- Original message -------- From: eosraptor1 <eosraptor@...> Date: 7/24/20 9:41 PM (GMT-06:00) Subject: Re: [VacuumX] Anybody still alive?
I have a 4" diff pump and cold trap and manual slide valve cheap to vacuum bud.??
Drew in sunny?FLA
On Fri, Jul 24, 2020 at 5:02 PM jlcampll < jlcampll@...> wrote: I'm here. Sold? my vapor deposition system and rounding up what's leftover to make another smaller system. Missing the diffusion pump. Not in a hurry at this point.
-------- Original message -------- Date: 7/23/20 10:40 AM (GMT-06:00) Subject: Re: [VacuumX] Anybody still alive?
I am still here although other projects have taken precedence.
Russ
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I had a veeco,?I think it was a v 301 system. 16 inch diameter 36in tall Pyrex chamber. Lifter and everything. Had a lot of fun with it doing science with the neighborhood kids and making some mirrors and?other stuff. It ended up at the Naval Post Graduate school in Monterey.? What I have left is a Precision D25 pump and controller for dual TC and ionization gauges. I have a 12" pyrex desiccator to use as a chamber.?I've got a lathe and mill to make parts to fit things together. I made a diff pump from a propane cylinder long ago. It kinda worked. How much could I get a small diff pump and valve for? Jim
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-------- Original message -------- From: eosraptor1 <eosraptor@...> Date: 7/24/20 9:41 PM (GMT-06:00) Subject: Re: [VacuumX] Anybody still alive?
I have a 4" diff pump and cold trap and manual slide valve cheap to vacuum bud.??
Drew in sunny?FLA
On Fri, Jul 24, 2020 at 5:02 PM jlcampll < jlcampll@...> wrote: I'm here. Sold? my vapor deposition system and rounding up what's leftover to make another smaller system. Missing the diffusion pump. Not in a hurry at this point.
-------- Original message -------- Date: 7/23/20 10:40 AM (GMT-06:00) Subject: Re: [VacuumX] Anybody still alive?
I am still here although other projects have taken precedence.
Russ
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I have a 4" diff pump and cold trap and manual slide valve cheap to vacuum bud.??
Drew in sunny?FLA
On Fri, Jul 24, 2020 at 5:02 PM jlcampll < jlcampll@...> wrote: I'm here. Sold? my vapor deposition system and rounding up what's leftover to make another smaller system. Missing the diffusion pump. Not in a hurry at this point.
-------- Original message -------- Date: 7/23/20 10:40 AM (GMT-06:00) Subject: Re: [VacuumX] Anybody still alive?
I am still here although other projects have taken precedence.
Russ
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I am? a tech? in instrumentation
maybe? you can help me
i use vacuum? for made some? coupole? Mirror by? put? some vacuum? inther? a schett of milar
but? I know? how to? built a pressure regulator?? like steam?analog regulator
but? fot? vacuum?? ana;laog? regulator
difficle
can? yhou help
jack 47 71?
quebec city
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Daniel Ekman SA2KNG
Dave McGuire
Christopher Erickson
Steve Vladimir
Dave