Filterglass. Light transmission at center (Approx.) Phosphor. " 78% F. Pa-Sulfide Type, Aluminized. Fluorescence. .white. + White. Frank's electron Tube Data sheets 23MP4 23ALP4 23AMP4 - Frank's electron Tube Data sheets
: Equipped with a "neoeightar" 7-pin glass-button base and a relatively flat faceplate for improved viewing. Performance Specifications
: Employs electrostatic focusing and includes an external conductive bulb coating that must be grounded.