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Power - Pentode (NOT beam) ·Pentode

6BJ5

High-transconductance audio power pentode capable of approximately 4 W single-ended Class A output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 6CH
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 640 mA

Description

Power pentode.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 6CH
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 640 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

6CH - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 40000 Ω
Transconductance: 0.0105 S
Max plate voltage: 350 V
Max screen voltage: 275 V

Promoted values from 6BJ5.pdf; section type follows printed electrode/function description.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
250 V
ClassA; OperatingPoint1
Screen voltage
250 V
ClassA; OperatingPoint1
Control-grid bias
5 V
ClassA; OperatingPoint1
Plate current
35 mA
ClassA; OperatingPoint1
Screen current
5.5 mA
ClassA; OperatingPoint1
Plate resistance
40000 ohm
ClassA; OperatingPoint1
Transconductance
10500 uS
ClassA; OperatingPoint1
Load resistance
7000 ohm
ClassA; OperatingPoint1
Power output
4 W
ClassA; OperatingPoint1