Heater-to-Cathode Voltage (max)Heater-to-Cathode Voltage (max)
Section 2 — Triode Strapped
Absolute Maximum
Anode Voltage (max)Anode Voltage (max)315V
Anode Dissipation (max)Anode Dissipation (max)7W
Cathode Current (max)Cathode Current (max)25mA
Max Grid ResistorMax Grid Resistor (cathode bias)2.2MΩ
Typical Operating
Heater
Heater VoltageHeater Voltage6.3V
Heater CurrentHeater Current0.4A
Notes
Electrically identical to type 41 (pre-octal base version).
Pin 1 (and pin 6) are omitted on 6-pin base variants (JETEC B6-81, B6-84).
Grid-No.1 circuit resistance: 0.1 MΩ max for fixed-bias, 0.5 MΩ max for cathode-bias (pentode); 2.2 MΩ max for cathode-bias in triode/vertical deflection service.
Triode-connected maximum plate dissipation is reduced to 7.0 W (vs 8.5 W in pentode mode).
7B5E is a Loctal-base version released in 1950.
Pin Layout — Octal
1No Connection
2Heater
3Anode (Plate)
4
Socket-Compatible Tubes ⚠ Not electrically compatible