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  #31  
Old 09-11-2011, 05:32 PM
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old_tv_nut old_tv_nut is offline
See yourself on Color TV!
 
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see this page for a picture of the cutaway that ETF has:
http://www.earlytelevision.org/2006_convention.html
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  #32  
Old 09-11-2011, 10:19 PM
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Robert Grant Robert Grant is offline
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May I also mention that "invar" is a trademark for a metal alloy that can withstand a significant range of temperatures without contracting or expanding (most metals expand when heated, a few contract, IIRC).

Without invar, the front of a CRT color TV set would have to be kept at exactly the right temperature, lest the mask change size, and the beams from the three electron guns would strike the wrong color dots around the edges.
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  #33  
Old 09-11-2011, 10:23 PM
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old_tv_nut old_tv_nut is offline
See yourself on Color TV!
 
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Actually, Invar is not the only fix for shadow mask expansion. There were patents granted (and used) for expansion-compensating shadow mask mounts such that when the mask expanded, it would move closer to the screen to compensate.
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  #34  
Old 02-27-2012, 12:13 AM
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fox_rivers fox_rivers is offline
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Hope he got sick from the Philco's phosphor and from the mercury contained in the CCFL backlight that flat panel had.
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Mastered soldering with paws.
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  #35  
Old 02-29-2012, 11:45 AM
akent36 akent36 is offline
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Not much worse than all the TV's, radios and console stereos that go into a dumpster after the donation auctions at the major swapmeets every year.
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  #36  
Old 03-02-2012, 02:30 PM
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charokeeroad charokeeroad is offline
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hunerd dollars to the first guy that can cut a CRT in half from front to back without damage!
(must be a dead one to start with of course)

Last edited by charokeeroad; 03-02-2012 at 02:47 PM.
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  #37  
Old 03-02-2012, 07:49 PM
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old_tv_nut old_tv_nut is offline
See yourself on Color TV!
 
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Quote:
Originally Posted by charokeeroad View Post
hunerd dollars to the first guy that can cut a CRT in half from front to back without damage!
...
To the CRT or himself?
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  #38  
Old 03-03-2012, 02:18 AM
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charokeeroad charokeeroad is offline
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Quote:
Originally Posted by old_tv_nut View Post
To the CRT or himself?
Either way but start with the CRT.
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