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Power - Pentode Single (NOT beam) (under 10W) ·Pentode

7B5

Power/output pentode designed for low-frequency or audio-frequency output amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
6AE
Socket code
B8G
Base pins
8
Nominal heater
6.3 V / 400 mA

Description

A Lock-In power output pentode intended for audio power-amplifier service, with Class A and push-pull Class AB operating data.

Socket description

Loctal 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
6AE
Socket code
B8G
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
400 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

6AE - 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
90000 Ω
Transconductance
0.0023 S
Max plate voltage
315 V
Max screen voltage
285 V
Max plate dissipation
8.5 W
Max screen dissipation
2.8 W
Rectifier max heater-cathode voltage
90 V

Published promoted fields populated by semantic heading; identical repeated physical sections compressed.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    300 mA

    Nominal

  • Maximum Plate Voltage

    250 V

  • Maximum Screen Voltage

    250 V

Characteristic

  • Transconductance

    2200 µS

    Typical

  • Plate Resistance

    68000 ohm

    Typical

Data set 02

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    7 V

    Nominal

  • HeaterCurrentNominal

    430 mA

    Nominal

  • Plate Voltage

    250 V

    ClassA

  • Screen Voltage

    250 V

    ClassA

Data set 03

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Typical plate voltage

    315 V

    ClassA

  • Typical screen voltage

    250 V

    ClassA

  • Typical grid voltage

    -21 V

    ClassA

  • Typical plate current

    25.5 mA

    ClassA

  • Typical screen current

    4 mA

    ClassA

  • Load resistance

    9000 Ohm

    ClassA

  • Power output

    4.5 W

    ClassA

  • Typical plate voltage

    250 V

    ClassA

  • Typical screen voltage

    250 V

    ClassA

  • Typical grid voltage

    -18 V

    ClassA

  • Typical plate current

    32 mA

    ClassA

  • Typical screen current

    5.5 mA

    ClassA

  • Load resistance

    7600 Ohm

    ClassA

  • Power output

    3.4 W

    ClassA

Characteristic

  • Plate resistance

    75000 Ohm

    315VPlate

  • Transconductance

    2100 uS

    315VPlate

  • Plate resistance

    68000 Ohm

    250VPlate

  • Transconductance

    2300 uS

    250VPlate

Data set 04

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Power Output

    4.5 W

    ClassA1;PlateVoltage=315V

  • Total Harmonic Distortion

    15 %

    ClassA1;PlateVoltage=315V