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#1
09-16-2004, 04:41 AM
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size is everything....
did RCA ...or anyone else ....design roundies bigger than 21"? and when rectangular tubes arrived did it take them long to get sizes bigger...23" ...25"?
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____________________________ ........RGBRGBRGB ...colour my world 
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#2
09-16-2004, 05:41 AM
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I think 25" was the standard for quite awhile.(in a CRT set) Sony had a special 30" console that was pricey and made in limited numbers in 1980 IIRC. Sony also had a 26" model available. My parents had a 26" Sony for years and I think the manufacture date was 1979. I don't think RCA or Zenith did anything bigger than a 25" CRT until the mid 80's.
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#4
09-16-2004, 06:32 AM
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Can you imagine if they made a 30" round color tube (like the size of the b/w tube in the Du Mont Royal Sovereign)...do you think the technology of the 60's would have allowed such a tube to be made?
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#5
09-17-2004, 01:36 AM
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They probably could have produced a 30" round color tube. But why? 21" roundies of the period were bulky and heavy enough. Can you imagine a 30" round color set? Just to create the proper deflection, the length of the tube and hence the size of the cabinet would take over the room. That and the shadow mask and glass envelope along with a huge high voltage section ect. would weigh a ton. Not to mention the convergence problems. A rectangular tube design was the only logical and practical solution at the time. This provided a decent size screen and a better aspect ratio.
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Please visit my CT-100, CTC-5, vintage color tv site: http://www.wtv-zone.com/Stevetek/ Last edited by Steve D.; 09-17-2004 at 01:40 AM.
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#7
09-18-2004, 06:17 PM
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of course the bigger the picture has got the more apparent the need for higher definition.
here in the PAL world the 625 line resolution means better sharper images than NTSC ...it is especially apparent with sport when they use long lenses. this of course does not include the quality of colour that tends to be also superior to NTSC ....(side by side comparison is easy since most PAL sets handle NTSC....and of course despite the lower field rate, most of us cannot detect flicker. on a 21" set the difference is not very noticeable but on 30" set it most definitely is....
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____________________________ ........RGBRGBRGB ...colour my world
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