Bell Labs Early Experimental Digit Pulse Coding Tube
Tube cathodique expérimental de codage numérique par impulsions
Versuchsröhre, Kathodenstrahlröhre für digitaler Pulscodierung

This tube was part of the collection assembled by Hallam E. Mendenhall (1900-1993).

A cathode-ray tube developed to perform 7-bit analogue to digital conversion, outputting a serial binary data stream from an analogue input. It was intended for use in early developmental pulse-code modulation systems.

Raymond W. Sears, Electron beam deflection tube for pulse code modulation, Bell Syst. Tech. J. 27(1), 1948.

U.S. Patent 2,458,652 (1949) R. W. Sears - Electron Discharge Apparatus.

U.S. Patent 2,632,058 (1953) F. Gray - Pulse Code Communication.

U.S. Patent 2,916,660 (1957) R.W. Ketchledge - Electron beam positioning system.

 

Click to enlarge

Longueur • Length • Länge : 37 cm • 14" 5/8
Diamètre • Diameter • Durchmesser : 13 cm • 5" 1/8

 

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