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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Sat Nov 23, 2013 8:03 pm Post subject: How are pj tubes measured? |
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Starting setup on a Sony 1252q. Finding centre of tubes. I get 5" wide 4.5" height. I believe this is considered an 8" pj. If it was 5x5 that would be 7" diagonal.
Just curious
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When the first clock was invented, how did they know what time to set it to?
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sat Nov 23, 2013 8:11 pm Post subject: |
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It's with a liberal amount of BS thrown in:)
you measure diagonally. It is considered an 8" tube by Sony, but if you check the usable phosphor area, it's actually under 7" diagonal.
In the older 10XX sets, Sony called them 7" tubes, but then added in small print '5.5" usable phosphor area'.
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Sat Nov 23, 2013 8:15 pm Post subject: |
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Thanks
Reminds me of measuring direct view. In Canada we are allowed the measure around the curvature of the face.Or is it US that allows that? 
_________________
When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sat Nov 23, 2013 8:19 pm Post subject: |
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I thought the rule was that you could round up. If the set measures 26.2", you can call it a 27". IN the US, that same set was called a 26".
<there's a really bad joke in there somewhere about Canadians, centimeters and being insanely well endowed, at least the American women think so, but I'll leave it alone. > 
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Sat Nov 23, 2013 8:23 pm Post subject: |
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Leave it alone if you like but that's why women are so bad at parking cars.
They've all been misled as to what 7" really looks like.
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When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Nov 23, 2013 10:56 pm Post subject: |
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Curt, thats Australians mate 
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Sun Nov 24, 2013 6:10 pm Post subject: |
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Curt we don't round down on the tv sizes here in the states a 27inch is a 27inch no matter the brand(been there before)
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crt king of black
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sun Nov 24, 2013 7:44 pm Post subject: |
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Yes you do. No TV measures exactly 27" or 42" or whatever.. In the US you round down, in Canada we round up.
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Sun Nov 24, 2013 9:51 pm Post subject: |
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| Curt Palme wrote: | | Yes you do. No TV measures exactly 27" or 42" or whatever.. In the US you round down, in Canada we round up. |
It wasn't started till crt tvs was going out(they used to just show 13, 27 ect ect)
I have a computer monitor that is a 17 with a 16.5 inch viewable area(not a big difference though)
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