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Thread: Before and after 445nm

  1. #1
    Join Date
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    Default Before and after 445nm

    So I just finished installing 753ma of 445 into my projector to mix with 250mw of 473.

    Check it out

    First pic is 445 only...


    Next with 445nm and 473nm




    My white now looks icy blue Lovely really!

    -Brooks
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  2. #2
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    Looks good man
    I still ogle that color.
    -Mike


  3. #3
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    Default

    Curious what PBS you are using and if you have measured the loss/reflection of it.
    leading in trailing technology

  4. #4
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    looks like it might be a laswerwave?

    the laserwave does ok at reflecting 445 and passing 473... it does pretty bad at passing 445 though... about 30% loss IIRC

  5. #5
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    Quote Originally Posted by flecom View Post
    looks like it might be a laswerwave?

    the laserwave does ok at reflecting 445 and passing 473... it does pretty bad at passing 445 though... about 30% loss IIRC
    Are you talking dichro or PBS?

    I found out the dichros (red laserwave) in my case only passed about 10% 445 and reflected the rest.

    I'm looking for the best PBS right now most have said there are not many good ones at 445.
    leading in trailing technology

  6. #6
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    Correct, It's a LW PBS. Not sure about the losses because I dont have a meter but works well enough. The only problem im having now is the Dei4Drive is just about killing the modulation to the 473(I just have the 2 MOD tied together)


    -Brooks
    10W RGB
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  7. #7
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    Smile

    Sounds like the input impedance on that driver is a little low, and that's pulling down the voltage on the modulation input to both drivers.

    If that's the case, then here's a link to a simple circuit that will buffer the color signal and allow you to get the full 5 volts to the drivers even if they have low input impedance. Basically it's a unity-gain op-amp. Very easy to build and install.

    (Credit to DZ for the idea behind the circuit.)

    Adam

  8. #8
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    Thanks buffo :P. I have a show on Wednesday that I was planning on running this with the 445 but it looks like I'm going to have to run 473 only and work on this issue after the show
    Sad day.

    -Brooks
    Last edited by KGB; 08-08-2010 at 20:42.
    10W RGB
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  9. #9
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    Quote Originally Posted by polishedball View Post
    Are you talking dichro or PBS?.
    PBS? you asked what the cube was right?

    I am not using laserwave dichros anymore so cant comment on them anyway

  10. #10
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    Exclamation He said "buffalo"...

    Quote Originally Posted by KGB View Post
    Thanks buffalo.
    ..............

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