Evaluation of Cathode-Ray Tubes for Use in Countermeasures Indicators
Abstract
Investigations carried on to determine the most satisfactory gun structure for use in cathode-ray tubes for countermeasures indicators revealed that the DuMont type K1134P2 is at present the most suitable five-gun tube for inclusion in new equipment design. An improvement in performance might be made by incorporating sensitive deflection plates (from a gun structure like the K1134P2) with an electron gun (from a gun structure like the K1052P2) that gives a greater intensity for a given line width. Because deflection plate cutoff prohibits the positioning of the spot over the entire useful screen area and limits the vertical deflection to less than two inches in tubes employing sensitive deflection structures, the JAN specifications are not applicable to some multigun tubes. An improved method of measuring line width and light output in which the measurements are made over a smaller area, and in which the writing speed is held constant, is suggested. This method would eliminate the ambiguity in the results obtained when using the JAN measuring procedure.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 28, 1952
- Accession Number
- AD1218331
Entities
People
- A. H. Hendrickson
Organizations
- United States Naval Research Laboratory