4HS8

Vacuum Tube Type: 4HS8, Filament / Heater: 4.2V at 600mA, Pin Count / Base: 9-Pin Miniature (Noval / B9A), Description: Dual-plate twin tetrode designed for operation as a combined sync separator, sync clipper, and noise canceller in television sets. Equivalent: Sylvania 4HS8 / GE 4HS8 / RCA 4HS8 / Westinghouse 4HS8 [1, 2, 3]