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Tom.W
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jkruger
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dvh99
Joined: 25 Dec 2009
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Location: nederland
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 Link Posted: Thu Apr 01, 2010 9:14 pm Post subject: |
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ok
ethyleenglycol 2 liters 25 euro
glycerine 1 liter 10 euro
glycol-glycerine 75%-25%
www.labstuff.nl
les pays bas
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marquee 9500ultra HD10L moome hdmi1.3 v3+ some mods.
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Tom.W
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Tom.W
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Sparky015
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| Link Posted: Thu Apr 01, 2010 11:40 pm Post subject: |
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Cool. I just want to be able to move that fast. 
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LOTREE
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Location: Paradise, Newfoundland
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| Link Posted: Fri Apr 02, 2010 1:49 am Post subject: |
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http://www.chemistrystore.com/product.cgi?group=49939&product=64138
Propylene Glycol 1 Quart: $12
And they also ship to Canada.
That YouTube video is okay. Like I commented before in another thread he's pretty violent with the glass and doesn't really use a lot of RTV sealant not to mention you don't need to hang the tube face up as there's a lip built in to hold the glass on the 07MS tubes. I could presume it was made based on my walkthrough of cleaning all the tubes in my ECP 4500 but then again there's only a few ways to do it.
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Gerbrand
Joined: 13 May 2008
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| Link Posted: Fri Apr 02, 2010 8:28 am Post subject: |
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| LOTREE wrote: |
Propylene Glycol |
I thought you needed ethylene glycol for crt coolant?
Gerbrand
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Ile
Joined: 09 Mar 2006
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Location: Jyväskylä, Finland
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| Link Posted: Fri Apr 02, 2010 10:00 am Post subject: |
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| Gerbrand wrote: | | LOTREE wrote: |
Propylene Glycol |
I thought you needed ethylene glycol for crt coolant?
Gerbrand |
Propylene glycol works just fine, it have same refraction index that ethylene glycol.
Actually it should be better, because it's nontoxic and it's not corroding aluminium as much that ethylene glycol. Corroding tube hardware cause fungus. I guess that ethylene glycol was chosen for crt coolant only because it's cheaper.
I have used straight propylene glycol in AC tubes years without problem.
For LC-tubes I mix 70% propylene glycol and 30% glycerin to get similar refraction index that tubes front glass and plastic c-element have. I have bought these from pharmacy.
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papalek
Joined: 08 Mar 2006
Posts: 1537
Location: Longs SC
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| Link Posted: Fri Apr 02, 2010 12:20 pm Post subject: |
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The Techspay TV coolant that is sold by MCM electronics is not Glycol unless these are other names for the same stuff.
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papalek
Joined: 08 Mar 2006
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Location: Longs SC
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| Link Posted: Fri Apr 02, 2010 12:34 pm Post subject: |
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Well I guess after further checking it is the same. The Chemical numbers are the same just different names for it.
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Tom.W
Joined: 09 Mar 2006
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Tom.W
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Ile
Joined: 09 Mar 2006
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Location: Jyväskylä, Finland
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| Link Posted: Tue Apr 06, 2010 11:32 am Post subject: |
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Didn't know that Propylene glycol have also better heat transfer efficiency.
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dvh99
Joined: 25 Dec 2009
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Location: nederland
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| Link Posted: Tue Apr 06, 2010 11:50 am Post subject: |
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yes but is it needed i dont think so.
these machines were used 10000 hrs and more in warm environments(simulators) with e-glycol so for home use it will be more than sufficient.
keep in mind it has a higher viscosity so it will be harder to fill the chambers and its twice as expensive.
i filled the marquee with a needle and had to apply quite some pressure with e glycol and glycerine.
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1 answer always poses multiple questions.
marquee 9500ultra HD10L moome hdmi1.3 v3+ some mods.
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Link Posted: Tue Apr 06, 2010 12:58 pm Post subject: |
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| dvh99 wrote: | yes but is it needed i dont think so.
these machines were used 10000 hrs and more in warm environments(simulators) with e-glycol so for home use it will be more than sufficient.
keep in mind it has a higher viscosity so it will be harder to fill the chambers and its twice as expensive.
i filled the marquee with a needle and had to apply quite some pressure with e glycol and glycerine. |
Yes, I know that.
Just trying to convince myself that it's better, because I couldn't get clear ethylene glycol from here.
Only colored one is easily available here, that's because it's poisonous.
If heat transfer efficiency would been my only worry, I'd been used distilled water. 
Actually someone reported few years back that he have been using distilled water in his projector tubes without problems. Can't remember if it was AC or LC optics, I guess that in LC there could be some small differences because water refraction index is different. Here freezing could cause disaster during storage or transport.
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David_Web
Joined: 02 May 2007
Posts: 418
Location: Sweden
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| Link Posted: Tue Apr 06, 2010 2:11 pm Post subject: |
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I wonder if distilled water would help with halos on an AC projector. The different IOR might send stray light all the way to edges.
HD144/145 already take care of the lens induces bounce.
Ile: I think he also said it was the sharpest image he had seen.
Can somebody test this? Preferably with HD144/145 lenses.
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Tom.W
Joined: 09 Mar 2006
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| Link Posted: Tue Apr 06, 2010 2:56 pm Post subject: |
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MAT electronics is selling glycol in 16oz bottles for $6.50 each or 10 for $5.95 each. Order#212072-16
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Tom.W
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mycatisretarded
Joined: 18 Jan 2008
Posts: 124
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| Link Posted: Thu Apr 08, 2010 9:33 pm Post subject: |
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A little off topic......but I work in a facility that manufactures optical fibers. Some of the optical test equipment uses a refractive index immersion liquid made by Cargill. I saw a couple 5 gal. containers of the stuff, It has an index of refraction of 1.4571. I also saw some smaller quantities at 1.4460. I couldn't find much info on the stuff- the msds didn't give much info. The boiling point was fairly high but I can't remember right now, the viscosity about 170 cSt (maple syrup is 165, glycerin is 550). I did the touch, sniff and taste test, it felt like an oil. I don't know if this would be a good solution to use in a projector. If the main purpose is optical coupling it may be ideal, if the main purpose is thermal heat related whatever it may not be ideal? Any thoughts? I'm sure i could get a couple tubes worth if anyone is interested in experimenting.
Info about Cargill liquids.. http://www.cargille.com/opticalintro.shtml
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