6BJ6

Small Signal Pentode — B7G

Tung-Sol

Known Equivalents & Substitutes

6BJ6ACV3909

Similar Tubes (Not Drop-In Compatible)

6662

Sams lists as substitute — same remote-cutoff pentode type

7694

Sams and Philips list as replacement — ruggedised variant

E99F

European equivalent — Brans and Sams list as substitute

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Max Plate Voltage300V

Screen Voltage (max)Max Screen Voltage125V

Anode Dissipation (max)Max Plate Dissipation3W

Typical Operating

Anode Voltage (typical)Plate Voltage250V

Screen Voltage (typical)Screen Voltage100V

Grid 1 Bias VoltageGrid Voltage-3V

Anode CurrentPlate Current9.2mA

Anode ResistancePlate Resistance

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.15A

Notes

Brimar data: at Va=250V, Vg2=100V: Ia=9.2mA, gm=3.8 mA/V, ra=1.3 MΩ. Va_max=300V, Pa_max=3W, Vg2_max=125V.
GE Essential Characteristics lists two entries: one as 'Remote-Cutoff R-F Pentode' (B7G, 7CM base) and one as 'Power Amplifier Pentode' (6CH base). The B7G miniature version is the standard 6BJ6.
Philips interchange lists 7694/E99F as replacement.
Predecessor models include 7A7, 7B7, 6SS7GT.

Pin Layout — B7G

1Control Grid (g1)

2Cathode,Suppressor Grid (g3)

3Heater

4

Socket-Compatible Tubes ⚠ Not electrically compatible

References