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Power - Beam Single (NOT sweep) (under 10W) ·BeamPower

35C5

Beam-power audio-output tube widely used in AC/DC receivers, providing Class-A loudspeaker power from low plate voltage and a 35 V series-string heater.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7CV
Socket code
B7G
Base pins
7
Nominal heater
35 V / 150 mA

Description

Miniature beam-power tube used in the audio power-output stage of compact AC/DC radio receivers.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7CV
Socket code
B7G
Base pins
7
Nominal heater voltage
35 V
Nominal heater current
150 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7CV - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G3AG3 — Suppressor GridGroup 7CV1

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN1KAK — CathodeGroup 7CV1

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN2G1AG1 — Control Grid

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN3H—H — Heater

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN4H—H — Heater

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN5G1AG1 — Control Grid

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN6G2AG2 — Screen Grid

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN7PAP — Plate (Anode)

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
13000 Ω
Transconductance
0.0058 S
Max plate voltage
135 V
Max screen voltage
117 V
Max plate dissipation
4.5 W
Max screen dissipation
1 W
Max cathode current
100 mA
Rectifier max heater-cathode voltage
180 V

Class-A.

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

Beam Power

Capacitance

  • Input capacitance

    11 pF

    Section1

  • Output capacitance

    6.5 pF

    Section1

  • Grid-to-plate capacitance

    0.4 pF

    Section1

Other

  • Plate voltage

    110 V

    ClassA

  • Screen voltage

    110 V

    ClassA

  • Control-grid voltage

    -7.5 V

    ClassA

  • Plate current

    40 mA

    ClassA

  • Screen current

    3 mA

    ClassA

  • Load resistance

    2500 Ω

    ClassA

  • Power output

    1.5 W

    ClassA

Characteristic

  • Transconductance

    5800 µS

    ClassA

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Power Output

    3 W

    ClassA1

Data set 03

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • Heater Voltage

    35 V

  • Heater Current

    150 mA

  • Transconductance

    5800 uS

  • Input Capacitance

    8.5 pF

  • Output Capacitance

    8.5 pF

Other

  • Plate Voltage

    110 V

    ClassA

  • Screen Voltage

    110 V

    ClassA

  • Grid Voltage

    -7.5 V

    ClassA

  • Plate Current

    40 mA

    ClassA

  • Screen Current

    4 mA

    ClassA

  • Load Resistance

    2500 ohm

    ClassA

  • Power Output

    1.5 W

    ClassA

Data set 04

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • MaxPlateVoltage

    150 V

    Published datasheet value

  • MaxScreenVoltage

    130 V

    Published datasheet value

  • MaxPlateDissipation

    5.2 W

    Published datasheet value

  • MaxScreenDissipation

    1.3 W

    Published datasheet value

  • Heater Voltage

    35 V

    Nominal heater rating

  • Heater Current

    150 mA

    Nominal heater rating

Characteristic

  • InterelectrodeCapacitanceDataPublished

    1 boolean

    See supplied datasheet capacitance table

Data set 05

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Plate Voltage

    110 V

    ClassA

  • Screen Voltage

    110 V

    ClassA

  • Plate Current

    40 mA

    ClassA

  • Maximum-Signal Power Output

    1.5 W

    ClassA

Data set 06

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Maximum Plate Voltage

    150 V

  • Maximum Screen Voltage

    130 V

  • Plate Dissipation

    5.2 W

  • Plate Voltage

    110 V

Characteristics

  • Plate Resistance

    13000 Ω

  • Transconductance

    5800 µS

Data set 07

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • GWD-No

    2 V

    Published in approved 35C5 target datasheet entry; Section1