6BM5

Power Pentode — B7G

Known Equivalents & Substitutes

Similar Tubes (Not Drop-In Compatible)

Similar power output pentode on same B7G base but different operating parameters — Sams lists as substitute

B7G power pentode, Sams lists same substitutes

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Anode Voltage (max)250V

Anode Dissipation (max)Anode Dissipation (max)9W

Screen Voltage (max)Screen Voltage (max)250V

Typical Operating

Anode Voltage (typical)Anode Voltage (typical)250V

Grid 1 Bias VoltageGrid 1 Bias Voltage-6V

Screen VoltageScreen Voltage (typical)250V

Anode CurrentAnode Current30mA

Anode ResistanceAnode Resistance

output_stage

Output PowerPower Output3.5W

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.45A

Notes

The 6BM5 is a miniature power pentode designed for use in audio output stages. GE rates it at 9W max plate dissipation with 6.3V/0.45A heater.
Sams lists 6AQ5, 6AQ5A, 6L31, 6P9 as substitutes.

Pin Layout — B7G

1Grid 1 (Control Grid)

2Cathode

3Heater

4

Socket-Compatible Tubes ⚠ Not electrically compatible

References