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

2E35

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
2E35
Socket code
-
Base pins
5
Nominal heater
1.25 V / 50 mA

Description

Directly heated low-power output pentode for battery-operated Class-A amplifier service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
2E35
Socket code
-
Base pins
5
Nominal heater voltage
1.25 V
Nominal heater current
50 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

2E35 - 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
250000 Ω
Transconductance
0.0005 S
Max plate voltage
90 V
Max screen voltage
90 V
Max plate dissipation
0.25 W
Max cathode current
10 mA

Promoted from the printed maximum-rating/characteristic columns; additional operating-point and capacitance data are retained in TUBE_SECTION_PARAMETER.

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

    1.25 V

    Nominal

  • HeaterCurrentNominal

    50 mA

    Nominal

  • Maximum Plate Voltage

    90 V

  • Maximum Screen Voltage

    90 V

  • Maximum Plate Dissipation

    0.25 W

  • Maximum Cathode Current

    10 mA

Characteristic

  • Transconductance

    1200 µS

    Typical

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Input capacitance

    2.7 pF

    Section1

  • Output capacitance

    5.7 pF

    Section1

  • Grid-to-plate capacitance

    0.2 pF

    Section1

Other

  • Plate voltage

    45 V

    ClassA

  • Screen voltage

    45 V

    ClassA

  • Control-grid voltage

    -1.25 V

    ClassA

  • Plate current

    0.45 mA

    ClassA

  • Screen current

    0.11 mA

    ClassA

  • Load resistance

    100000 Ω

    ClassA

  • Power output

    0.006 W

    ClassA

Characteristic

  • Plate resistance

    250000 Ω

    ClassA

  • Transconductance

    500 µS

    ClassA

Data set 03

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    45 V

  • Grid 1 Voltage

    -1.25 V

  • Grid 2 Voltage

    45 V

  • Plate Current

    0.6 mA

  • Grid 2 Current

    0.11 mA

  • Output Power

    6 mW

  • Load Resistance

    100000 ohm

Characteristic

  • Transconductance

    525 uS

  • Plate Resistance

    0.25 Mohm