Skip to main content

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

35EH5

Power pentode designed for audio-frequency output service with a 35 V, 150 mA heater. Manufacturer data provide ratings, characteristics, and typical operating conditions for receiver audio power stages.

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

Description

Power pentode intended for audio output service. It uses a nominal 35 V, 0.15 A heater. The supplied datasheet was used for ratings, characteristics, and typical operating data.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7-pin miniature
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

7-pin miniature - 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
12000 Ω
Transconductance
0.0075 S
Max plate voltage
150 V
Max screen voltage
130 V
Max plate dissipation
5.5 W
Max screen dissipation
1 W
Max cathode current
100 mA

Published promoted fields populated by semantic section ownership.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    110 V

    Typical

  • Screen Voltage

    110 V

    Typical

  • Power Output

    1.8 W

    MaximumSignal

Data set 02

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater Voltage

    35 V

  • Heater Current

    150 mA

  • Transconductance

    12000 uS

  • Input Capacitance

    9 pF

  • Output Capacitance

    8.5 pF

Other

  • Plate Voltage

    110 V

    ClassA

  • Screen Voltage

    110 V

    ClassA

  • Grid Voltage

    -5 V

    ClassA

  • Plate Current

    50 mA

    ClassA

  • Screen Current

    7 mA

    ClassA

  • Load Resistance

    2200 ohm

    ClassA

  • Power Output

    1.2 W

    ClassA

Data set 03

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Plate Resistance

    14000 ohm

    Published datasheet value

  • Transconductance

    12000 µS

    Published datasheet value

  • InterelectrodeCapacitanceDataPublished

    1 boolean

    See supplied datasheet capacitance table

Other

  • MaxPlateVoltage

    150 V

    Published datasheet value

  • MaxScreenVoltage

    130 V

    Published datasheet value

  • MaxPlateDissipation

    5 W

    Published datasheet value

  • MaxScreenDissipation

    1.75 W

    Published datasheet value

  • Heater Voltage

    35 V

    Nominal heater rating

  • Heater Current

    150 mA

    Nominal heater rating

Data set 04

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Maximum Plate Voltage

    150 V

  • Maximum Screen Voltage

    130 V

  • Plate Dissipation

    5 W

  • Screen Input

    1.75 W

  • Screen Supply Voltage

    115 V

Characteristics

  • Plate Resistance

    14000 Ω

  • Transconductance

    12000 µS