Medium-Mu Twin Triode (Low Noise)
The 4BS8 Vacuum tube is a miniature type used as a
cascode amplifier in VHF color and black-and-white
television tuners and in push-pull cathode-drive RF
amplifiers. They require a miniature 9-contact socket.
Electrical Data:
Heater Voltage ................................ 4.5 V
Heater Current ................................ 0.6 A
Preferred Substitutes ........... 4BZ8 4BC8 4BQ7 4BX8
Substitutes ............................... 4BX8 4KN8