Television History - The First 75 Years
 
 

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1951 CBS (Mechanical) Color Television        

(35K)
CBS-Columbia Model 12CC-2

Training Booklet for this System:

(44K) 

(49K)
Graphical layout of the CBS Color System, with the synchronized rotating color wheel shown at the camera and receiver.

(60K)    (89K)
Summary of Performance Characteristics Submitted to the Senate Advisory Committee in 1950, to help them decide which system should be used in the United States.  There were three in competition:  Line Sequential (CTI), Field Sequential (CBS), and Dot Sequential (RCA).

(75K)
Explanation of Line Sequential System - Figure 4.  Note:  The reference to CBS is for Fig 5., which is the next system discussed.  It does not relate to line sequential, the text just happens to appear on this page.

(34K)
Explanation of Field Sequential System - Figure 5.  This is the system proposed by CBS.

(37K)
Explanation of Dot Sequential System by RCA.

(72K)
Compact 17 inch CBS Color receiver, demonstrated in New York city, December 1950.  The common misconception (then and even now) was that large screen CBS color receivers would require huge spinning wheels for large screen sets.  This early prototype utilized an ingenious method to get around the large circular disk -- it used a rotating drum instead!  See below.

(38K)
Rotating drum concept for large-screen CBS color receivers.

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