Sharp-Cutoff Pentode >
Thje 7W7 Vacuum tubes is a glass lock-in type used as an RF ot IF amplifier in radio receivers.
It requires a lock-in socket.
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ............................... 0.45 A
Preferred Substitutes ............ 1282, CV902