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Power - Tetrode (NOT beam) ·Tetrode

7377

Radiation-cooled twin tetrode designed for push-pull Class-C service. Its paired high-frequency sections provide balanced RF power amplification in compact professional equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B8G
Base pins
8
Nominal heater
6.3 V / 600 mA

Description

7377 is listed in the supplied Amperex material as a radiation-cooled twin tetrode for push-pull Class-C service. Published electrical ratings and operating data were captured from the supplied table.

Socket description

Loctal 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B8G
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
6.3 V
Parallel heater current
600 mA
Series capable
Yes

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

Tetrode

X-ray radiationInterelectrode capacitances
Transconductance
0.0105 S
Amplification factor
28
Max plate voltage
400 V
Max screen voltage
225 V
Max plate dissipation
10 W
Max screen dissipation
1.75 W

Representative row for two electrically identical transmitting-tetrode sections.

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

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Heater/Filament Voltage

    6.3 V

  • Heater/Filament Current

    600 mA

  • Maximum Plate Voltage

    400 V

  • Maximum Plate Dissipation

    10 W

  • Maximum Screen Voltage

    250 V

  • Maximum Screen Dissipation

    1.75 W

Characteristics

  • Transconductance

    10500 uS

  • Amplification Factor

    28

Data set 02

1960 Mazda

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Capacitance

  • Grid1 Anode Capacitance

    0.145 pF

  • InputCapacitancePerSection

    4.5 pF

  • OutputCapacitancePerSection

    1.35 pF

  • PushPullInputCapacitance

    2.4 pF

  • PushPullOutputCapacitance

    0.82 pF

Other

  • NominalPlateVoltage

    250 V

  • NominalScreenVoltage

    200 V

  • NominalPlateCurrent

    25 mA

  • Maximum Frequency

    960 MHz

Data set 03

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

  • Heater/filament voltage

    12.6 V

    Published rating

  • Heater/filament current

    300 mA

    Published rating

  • Amplification factor

    28

    ClassC PushPull

Other

  • Maximum plate dissipation

    8 W

    EachUnit

  • Plate voltage

    250 V

    ClassC PushPull

  • Plate current

    35 mA

    ClassC PushPull

  • Power output

    15 W

    ClassC PushPull

  • Maximum frequency

    1000 MHz

    ClassC PushPull