This tube offered several improvements over the Iconoscope Emitrons. The CPS Emitron tube was of the Orthicon class and the target was at the front of the tube, optically good for the lenses, and it was scanned orthogonally from the rear so no keystone distortion. The target section was 3.5 inches in diameter and the main tube 2.5 inches. It was also said that the CPS Emitron tube was free of the shading problems of the Emitron tubes. The instability known as 'peeling' was a problem for the early tubes. It was caused by a bright object in the field of view, a lamp, or bright specula reflection overloads the tube. Photographers flash bulbs were known to be a serious problem. Once a tube started to peel little could be done until normal operation could be recovered. Later cameras (1950+) had a compensation circuit to automatically reset the tube and later CPS Emitron tubes were free of the defect.
The end window. The maximum diameter is 87 mm with the body of the tube at 65 mm. The neck by the base is 32 mm diameter.
The scanning coils would fit over the main body of the tube.
The B8B or Loktal base and evacuation tube seal.
The end window envelope is 87 mm in diameter, and excluding the B8B base pins is 364 mm tall.
Reference: www.tvcameramuseum.org. Type 5954 was first introduced in 1947.