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#1
07-21-2014, 11:48 PM
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IIRC the 23EGP22 was the only American color delta gun CRT with a side HV connector.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 
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#3
07-22-2014, 08:06 PM
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Quote:
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#4
07-25-2014, 01:18 AM
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Quote:
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#5
09-05-2014, 05:39 AM
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Hi to all,
Sept 3rd: Noriyoshi has resumed work on restoration of the Chromatron. Picture is now in focus and fully covers screen. Still some work needed on the color decoder - see photos. http://translate.google.de/translate...Fvrc-tezuka%2F I have acquired a 1967 Japanese book where there are the schematics of the Sony 19C-90 Chromatron, essentially the same model but in a different cabinet, this one is a floor-standing model. See the full resolution scans on Marshall's site (Thanks! for posting them). Scanned as 4 pages to not wreck the book. Located approx. middle of the very long page. http://www.visions4.net/journal/chromatron Best Regards jhalphen Paris/France
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#6
09-05-2014, 09:40 AM
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This has been a very interesting thread to follow. Dr. Lawrence would be proud to see that people care about his Chromatron invention and are working to restore a set made with it some 45 years later!
I also agree very "UnSony" like design, from having looked at Trintron sets all the way form a 1972 12" monitor/receiver to a 2004 34" 16x9 HD set with HDMI. Now if we could ever find out about those TV's used by PYE for the experimental broadcast of the Coronation back in 1953. there where broad hints that those sets used where of a Chromatron design and has a 21" screen. Matt
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#7
09-05-2014, 11:42 AM
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Hi to all,
@Matt, Thanks! and it's not quite finished yet. For the lazy guys among us who don't have time to roam around the full size scans on Etype2's site with a magnifying glass, here are zoomed illustrations of Sony's 19C-90 in the Japanese 1967 Color TV book. The Chromatron Noriyoshi is repairing 19C-100 has virtually the same circuitry, but in a tabletop cabinet. The Chromatron displayed at the Sony Museum in Tokyo is referenced 19C-70 but the schematics book shows model 19C-90. Their appearance seems totally identical. Anyway, all used the 480AB22 48cm screen diagonal Chromatron CRT. It is interesting to observe how fast Sony progressed after the three first models (1964-1967) as the all-transistorized* KV-7010U Chromatron with an 8" screen came out in early 1968. *except for two EHT rectifier tubes. see E-type2's site: http://www.visions4.net/journal/chromatron Best Regards jhalphen Paris/France Last edited by jhalphen; 09-05-2014 at 11:52 AM.
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