Medium-Mu Twin Triode
Miniature type used as a cascade amplifier in VHF color
and black-and-white television tuners and in push-pull
cathode-drive rf amplifiers. Requires a
miniature 9-contact socket.
Electrical Data
Heater Voltage ................................ 4.2 V
Heater Current ................................ 0.6 A
Preferred Substitutes ............... 4BC8 4BZ7 4BZ8
Substitutes ................................... 4