6065

Small Signal Pentode — B7G

Brimar

Known Equivalents & Substitutes

Similar Tubes (Not Drop-In Compatible)

EF85

Similar variable-mu RF pentode on B9A base — not pin-compatible

Electrical Specifications

Absolute Maximum

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

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

Anode Dissipation (max)Anode Dissipation (max)2.5W

Screen Dissipation (max)Screen Dissipation (max)0.6W

Heater-to-Cathode Voltage (max)Heater-Cathode Voltage (max)90V

Typical Operating

Anode Voltage (typical)Anode Voltage250V

Screen Voltage (typical)Screen Voltage200V

Grid 1 Bias VoltageGrid Voltage-2.5V

Anode CurrentAnode Current8mA

Screen CurrentScreen Current

Capacitances

Grid-to-Plate CapacitanceGrid-to-Plate Capacitance (max)0.007pF

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.2A

Notes

Variable-mu (remote cutoff) characteristic for AGC-controlled RF/IF stages.
CV4015 is the military designation; M8161 is the Mullard special quality equivalent.
External shield connected to Pin 2 (cathode).
Two sets of typical operating conditions: Vg2=150V and Vg2=200V.

Pin Layout — B7G

1Control Grid (g1)

2Cathode (and internal shield)

3Heater

4

Socket-Compatible Tubes ⚠ Not electrically compatible

References