Summary

A cathode ray tube manufactured by Sylvania. A Sylvania catalogue from 1949 describes the features of this cathode ray tube:

Heater Volts: 6.3
Heater Amps: 0.6
Diameter (inches): 5.25
Length (inches): 16.75
Base: Medium Shell Diheptal 12 Pin
Screen Flourescence: Green
Screen Persistance: Medium

Physical Description

Conical glass bulb with tubular neck. Phosphor coated screen at the wide end and diheptal bakelite base with 12 pins present at the end of the tubular section. The inside of the bulb has two areas coated with graphite with two bands of a light coloured material separated by about 25 mm on the facing edges of the graphite coated areas. A recessed connector allows connection to the coating nearest the screen.

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