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skittletop
Joined: 24 Nov 2007
Posts: 19
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| Posted: Sat Mar 27, 2010 3:42 am Post subject: How Much Glycol? |
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I've got a replacement blue for my 1292 which came without glycol. I purchased some from Curt and set about filling her up, there was *some* glycol left swilling around in the chamber. Curt said I needed about 1 bottle (500ml) and a bit more.
After a bottle and a bit I re-secured the screw and looked at the tube face which still had an air pocket at the top, so I filled it with the rest, all in all I'd say I put about 700ml in total.
EDIT: I had the tube upside down, turning the right way up there is still an air bubble right at the top of the chamber, but the tube is completely submerged, and the top of the lens is about level.
Is this enough for the chamber, or did I overfill it?
Many thanks in advance,
Brad.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Sat Mar 27, 2010 4:42 am Post subject: |
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Sounds OK but I've never seen a 1292 LC assembly...
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Sat Mar 27, 2010 4:56 am Post subject: |
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Sounds ok.
But Graham would know best.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Sat Mar 27, 2010 12:46 pm Post subject: |
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i used 75 % ethylene glycol and 25 % glycerol.
someone advised this to me on the avs forum, it probably has something to do with the refractive index.
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marquee 9500ultra HD10L moome hdmi1.3 v3+ some mods.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Sat Mar 27, 2010 12:46 pm Post subject: |
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i used approx 1.8 liter for the marquee (3 tubes)
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Sat Mar 27, 2010 10:54 pm Post subject: |
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| dvh99 wrote: | i used 75 % ethylene glycol and 25 % glycerol.
someone advised this to me on the avs forum, it probably has something to do with the refractive index. |
No, it has something to do with corrosion.
It neutralises the glycol, which will corrode the aluminium housing otherwise.
Marquees are shockers for this, but the 1292, with stock coolant, is ok.
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Sparky015
Joined: 12 May 2009
Posts: 1185
Location: Cleveland / Akron, OH
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Sun Mar 28, 2010 7:24 pm Post subject: |
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I think there are hazardous materials restrictions on the import/export of this stuff.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Mon Mar 29, 2010 2:47 am Post subject: |
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| Tom.W wrote: |
The glycerin does change the refractive index but glycol is also corrosive... |
It is my recollection, from when we looked into this years ago, that the RI's were pretty close to identical.
How different is glycerin to glycol?
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Tom.W
Joined: 09 Mar 2006
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Mon Mar 29, 2010 10:45 am Post subject: |
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i must say that when i mixed the stuff the liquid became clearer.
300ml e-glycol 100ml glycerol.
this topic should be a sticky cause for people who cant get their hands on the already mixed tv coolant might end up with just using e-glycol.
i almost made this mistake, but like i said someone on the avs forum pointed this out to me after asking how much glycol was needed.
he told me to use a mix anything between 80-20 and 70-30.
a lot of people keep talking about glycol alone and thats when errors are made when someone new to crt (like me) read posts on the forum and go on filling the chambers without the glycerol.
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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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| Posted: Mon Mar 29, 2010 11:21 am Post subject: Re: How Much Glycol? |
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| skittletop wrote: | After a bottle and a bit I re-secured the screw and looked at the tube face which still had an air pocket at the top, so I filled it with the rest, all in all I'd say I put about 700ml in total.
EDIT: I had the tube upside down, turning the right way up there is still an air bubble right at the top of the chamber, but the tube is completely submerged, and the top of the lens is about level.
Is this enough for the chamber, or did I overfill it?
Many thanks in advance,
Brad. |
You can fill 1292 tube full, because it have expansion tank with rubber bellow for expansion. It's similar bellow that G90 tube have in below picture.
Just make sure that bellow is pushed in when filling, so it have room for maximum expansion.
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cinema mad
Joined: 25 Nov 2009
Posts: 219
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| Posted: Mon Mar 29, 2010 12:23 pm Post subject: |
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A while ago I bought about 12 x500ml bottles of MG chemicals 803 projection tube coolent here in Oz due to the Oz supplier dropping the product line.
MG dont provide the Refractive index for this product but when I contacted them, they stated that they possibly could acquire it if nessasary...
The Blend ratio % is 80/20...
http://www.mgchemicals.com/products/803.html
Cheers...
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Gerbrand
Joined: 13 May 2008
Posts: 199
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| Posted: Mon Mar 29, 2010 9:17 pm Post subject: |
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Hello,
I will be needing glycol for a set of P19LCB03s soon. Does anybody know of a supplier in Europe? Preferably within the EU...
Regards,
Gerbrand
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Tue Mar 30, 2010 12:13 am Post subject: |
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gerbrand belg of nederlander?
www.labstuff.nl
ik heb 2 liter ethyleenglycol en 1 liter glycerine besteld en de verhouding 75-25 aangehouden.
bij de apotheker zijn de injectienaald en spuit verkrijgbaar.
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marquee 9500ultra HD10L moome hdmi1.3 v3+ some mods.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Tue Mar 30, 2010 12:47 am Post subject: |
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hehe apprehended lol.
automatic translation has a long way to go.
_________________
1 answer always poses multiple questions.
marquee 9500ultra HD10L moome hdmi1.3 v3+ some mods.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Tue Mar 30, 2010 12:53 am Post subject: |
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| dvh99 wrote: | hehe apprehended lol.
automatic translation has a long way to go. |
No U.T. yet?
Geek points for the right guess 
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