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  #31  
Old 12-21-2014, 03:34 PM
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Quote:
Originally Posted by jhalphen View Post
Hi to all,

Also thinks it's a 3 gun tube, therefore not a true Chromatron.

jhalphen
Paris/France

Remember, the original Lawrence Tube renamed Chromatron was developed as BOTH one and three gun CRT's by Chromatic Television Labratory Inc. starting in 1951. Dr. Lawrence partnered with Paramount Pictures and Chromatic was a division of Paramount. Chromatic always knew that a three gun Chromatron would be considerably brighter then a one gun, but the one gun version received all the interest because of the potential simplicity of operation and lower manufacturing costs. Prototypes of both one and three gun versions were made through the years, then Sony bought the license and development rights from Paramount, first in 1961 and 1964.
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  #32  
Old 12-22-2014, 08:45 PM
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Nothing against this highly informative and interesting thread, but frankly I'm surprised that it hasn't been moved to the rectangular forum. Again very interesting.
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  #33  
Old 12-22-2014, 09:20 PM
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Originally Posted by Tubejunke View Post
Nothing against this highly informative and interesting thread, but frankly I'm surprised that it hasn't been moved to the rectangular forum. Again very interesting.
Seems like it fits here ok:

"Early Color Television (7 Viewing)
Discussions of experimental color televisions, and round screen production models, ending around 1966."

jr
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  #34  
Old 01-26-2019, 10:47 AM
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Quote:
Originally Posted by Sandy G View Post
I remember seeing a Sony color set & BIG-@zz VCR on an audio-visual type roll-around cart-The metal kind schools used, prolly 1968-'69, but the TV was NOT a Trinitron... Looked more like a Zenith or RCA table model, was about 19-23" whatever they usually were. This was at Bondurant Bros. Co. in Knoxville, they were the Sony distributors for Knoxville & environs back then. I DON'T think Sony ever re-badged somebody else's sets, at least not in the "Consumer" line, but MAYBE they did in the A/V business... Anybody got any ideers ?!?
I have a Setchell Carlson tube color monitor with Sony badging. http://videokarma.org/showthread.php...tchell+Carlson It probably was made as an accessory or a trade show monitor for some early tape or camera gear.
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  #35  
Old 01-26-2019, 01:15 PM
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The Sony Profeel system circa 1980’s

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  #36  
Old 01-27-2019, 05:38 PM
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That clunking SL-5000 Betamax came out in 1981.. Those have a handful of defected electrolytic caps on the servo board which cause unstable playback between the drum speed and tape speeds..
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  #37  
Old 03-18-2019, 11:04 PM
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We had a profeel customer with a large monitor that we kept taking back to the shop for a shutting itself off symptom. I forget the size of the set but I want to say at least a 21 inch or larger. That was a heavy monitor. I think we had it back and forth between the owners home and the shop at least 3 times. Even put heavy blanket to try to get it to heat up. We finally did get it fixed. It was the HV shutdown circuitry that was detecting arcing in the HV block. A new HV block fixed it finally.
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