Sharp-Cutoff Twin Pentode
The 4HS8 Vacuum tube is a miniature type used as AGC
amplifier, sync and noise limiting circuits of color and
B&W TV receivers. One pentode is used as a combined
sync-separator and sync-clipper. The second pentode is
used as an AGC amplifier. This tube requires a miniature
9-contact socket.
Electrical Data:
Heater Voltage ................................ 4.2 V
Heater Current ............................... 0.45 A
Preferred Substitutes .................. 4GS8
Substitutes ....................... 4BU8 4KF8