Little-Miss (9th June 2010)
buy an air compressor and go blow the dust out of them all. That will surely prolong their lives. Especially now that its summer and are more liable to suffer from overheating!
Generally speaking, in your situation (which I am), I would get a company in to fit them. You cannot really do it on your own and the issues with moving and/or changing brackets is probably a bit much when you are the lone techie.
Do you have any good local contacts? A company who will come in and survey your current set-up and advise you about projectors, brackets etc? You need a ball-park figure (yes, I know - Yuck) to be able to show SMT
I've been putting a few of these in recently: Optoma DS316 SVGA - 2500 Ansi Lumens (DS316) - dabs.com they're cheap as chips (£239) and so bright they leave scorch marks on the whiteboards - well not really but 2500 Lumens. They're also small and light and we've yet to find a projector bracket that couldn't be bodged to adequately take them. At that price I'm less concerned about lamp life and the fact that they're only natively SVGA - after the knackered, dim HP projectors they're replacing they look pin sharp in comparison!
The company i've had in recently to do my Hall AV setups were fantastic so i'm working with them at the moment. I do already have a ball park figure. Just trying to work out where i can get the funds from.
If you need new mounts or need to move them, consider short throw projectors as replacements; these fit much closer to the board and are less likely to shine in staff & student eyes when in use.
Also remember that the projector lenses are often offset left/right from the mount centre line and different brands can mean you have to move the mount even if the throw is the same.
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