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Room size and CRT

Discussion in 'Projectors, Screens & Video Processors' started by Jonesthegas, Feb 7, 2003.

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  1. Jonesthegas

    Jonesthegas
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    I am building an extension which will become my home cinema room. The maximum which the planning department will allow is a room of 4.25m internal length.

    Is this long enough for a CRT (I had planned on installing a Barco 1209)?

    What size of screen would it project to from about 3.75m?

    Martin
     
  2. nathan_silly

    nathan_silly
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    My room is approx the same, Roland from B4 gave me details for a Barco 708 in my room..


    "That's not a big room.
    I have to calculate in metric so here goes.
    10'5" = 3180mm
    take off 730mm for the length of the projector and allow for the lid to open = 2450mm
    50mm for the creeen to stand out leave you with 2400mm

    A 708 style projector would give you a 1740mm wide 16x9 image.
    In old money 5 foot 8 inches wide.

    That's easily within the specification of the projector."
     
  3. X3ELS

    X3ELS
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    My rooms about that long and has a 9inch CRT in there :)

    Or will have when i work out how to get it up onto the ceiling..... :)
     
  4. nathan_silly

    nathan_silly
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    Try and lift the projector up to the ceiling by yourself! :zonked:

    Fairly easy cos I'm dead strong!:p
     
  5. X3ELS

    X3ELS
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    hmmm think i value my stomach lining to much to put a hole in it :)

    :suicide: :suicide:
     
  6. MATT JENNER

    MATT JENNER
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    I aint too sure about the mathematics
    but i was always told to calcualte the size of the screen , multiply it by 1.5 and that should give you the distance from screen to lens,

    eg - i have an 8ft screen so my Ellie 3000 had to be 12ft away,
    and i have to say it fits the screen with a few inches left to spare.
    I aint too sure about the barco, although being a prjector costing tonnes more than the ellie i would hope the calculation would work the same way.
     
  7. Roland @ B4

    Roland @ B4
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    I do, every day
     
  8. Roland @ B4

    Roland @ B4
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    Here we go.
    A 1200 series is 904mm long with a bit for air behind say 1004mm to the front rail.
    That gives you a throw of 2746mm

    Using the barco lens program you could go as big as 1860mm wide. That's just over 6ft.

    You will be likey to get a build up of heat in a room that size if you can vent the hot air from the back of the PJ life will be far better.

    It's doable but probably worth comeing down to an 808 unless you have a special reason.
     
  9. Jonesthegas

    Jonesthegas
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    Thanks Roland.

    What would be the difference in the picture produced by an 808 and a 1209 in that size of room?

    What could we build into the room to vent the heat? Perhaps a vent into the next room immediately behind the projector?

    Martin
     
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