Fourteen-stage, head-on, flat-faceplate type having S-11 response. Wavelength of maximum spectral response is 4400 +/- 500 angstroms. Makes use of copper-beryllium dynodes and a curved-circular, semi-transparent, cesium-antimony photocathode. Window material is Corning No. 0080 lime glass or equivalent. Has a non-hygroscopic base.
