Medium-Mu Triode - Sharp-Cutoff Pentode
The 4BL8 Vacuum tube is a miniature type used in
frequency-Changer service in
color and black-and-white television receivers. It
requires a miniature 9-contact socket.
Electrical Data
Heater Voltage ................................ 4.6 V
Heater Current ................................ 0.6 A
Substitutes ...................... 5CQ8 5EA8 5GH8 5U8