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Screen question

 
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jbltecnicspro



Joined: 23 Apr 2016
Posts: 512
Posted: Sat Jul 16, 2016 11:52 am    Post subject: Screen question
So the wife and I built our own screen using Carl's 1.1 white matte fabric. I also saw that he (they?) has a silver screen option. Would this be a bad choice for CRT projection?

https://www.amazon.com/Carls-SilverScreen-Projector-Material-Passive/dp/B00JDRKW2M/ref=as_li_ss_tl?ie=UTF8&qid=1468669894&sr=8-3&keywords=carl+projector+screen+silver&linkCode=ll1&tag=curtpalmecrtp-20&linkId=8bb6c71ef7ed224bb921961d9088494e
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Spanky Ham



Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central

Posted: Sat Jul 16, 2016 10:18 pm    Post subject:
Yes.
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jbltecnicspro



Joined: 23 Apr 2016
Posts: 512
Posted: Wed Jul 20, 2016 9:13 pm    Post subject:
Spanky Ham wrote:
Yes.


Why? Is it the silver color? Sorry - was busy and haven't had time to read your response. Thank you, by the way.
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Spanky Ham



Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central

Posted: Wed Jul 20, 2016 10:40 pm    Post subject:
The gain is to high unless you want to do a Torus.
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ecrabb
Forum Moderator


Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010
Posted: Thu Jul 21, 2016 5:57 pm    Post subject:
Since it looks like Spanky is trying to win a "shortest post" contest, I'll fill in the blanks a little... Wink

The high-gain material will show hot-spots. A little hot-spotting isn't so bad with a digital projector, but with a CRT you see multicolored hot-spots, or what's sometimes referred to as color shift. That's what makes it unsuitable for use with CRT.

The only way to use it with CRT would be a torus screen. The torus screen is curved in both directions and essentially spreads the hot spot out over the entire screen.

Cheers,
SC
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