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#2
07-21-2014, 12:53 PM
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Quote:
I just realized, this is the first color CRT I've seen with the 2nd anode connector on the side, and the first from this era I've seen that lacks an external degaussing shield. Last edited by Jon A.; 09-29-2015 at 04:05 PM. 
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#4
07-21-2014, 07:00 PM
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I do NOT think this is a chromatron . WHY would one need convergence for a chromatron? The whole REASON for the chromatron--is to get away from the shadow mask and convergence.....this has a cloverleaf....
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#5
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.
__________________
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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#7
07-22-2014, 08:06 PM
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Quote:
__________________
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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#8
07-25-2014, 01:18 AM
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#9
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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#10
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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#11
07-22-2014, 12:17 AM
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Could they be using the clover to simply align the three beams into a horizontal line, as well as for geometry?
If it was developmental towards the Trinitron, the second high voltage point might be for the h-stat convergence electrode?
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#12
07-22-2014, 01:04 AM
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It looks so "un-Sony", but I guess that comes from having never seen a Sony set that wasn't a Trinitron, or anything Sony that was tubed.
There has been a small update to the original post at the original link (unless I missed it the first time, I was having issues getting google translate to load the entire page). It appears a lot of information and possible even a schematic for the related 19C-70 model was published in a special 1967 edition of a Japanese electronics magazine: 電波科学 1967-1 I found this link for an auction selling the magazine: http://page9.auctions.yahoo.co.jp/jp/auction/k149449266 Though getting things from Yahoo auctions Japan from outside of Japan tends to be difficult and expensive.
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#14
07-22-2014, 10:19 AM
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Hi to All,
Dr ido: my friend has purchased the schematics book for me on Yahoo! Japan. When i receive it, i will scan the interesting pages concerning the Sony 1967 Chromatron. In the meantime, for those having issues reaching the Blog, here is the full book page + zoomed snapshots of the CRT data contained in the book. Please bear in mind the original entire photo is only VGA resolution 640x480 and therefore quite poor; Sorry! Photo credits: N.Tezuka the Blog: http://translate.google.de/translate...Fvrc-tezuka%2F Update: Now 26 photos. Best Regards jhalphen Paris/France Last edited by jhalphen; 07-23-2014 at 01:31 PM.
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