2E32

Directly heated sharp-cutoff RF pentode in the low-power 2E31 family for compact battery-operated high-frequency equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 2E31
Socket code: -
Base pins: 5
Nominal heater: 1.25 V / 50 mA

Description

Directly heated sharp-cutoff RF pentode sharing the printed characteristics of the 2E31 family.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 2E31
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

2E31 - 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: 350000 Ω
Transconductance: 0.0005 S
Max plate voltage: 90 V
Max screen voltage: 90 V
Max plate dissipation: 0.2 W
Max cathode current: 3 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
0.2 W
Maximum Cathode Current
3 mA

Characteristic

Transconductance
700 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
4.2 pF
Section1
Output capacitance
4 pF
Section1
Grid-to-plate capacitance
0.018 pF
Section1

Other

Plate voltage
22.5 V
ClassA
Screen voltage
22.5 V
ClassA
Plate current
0.4 mA
ClassA
Screen current
0.3 mA
ClassA

Characteristic

Plate resistance
350000 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
22.5 V
Grid 1 Voltage
0 V
Grid 2 Voltage
22.5 V
Plate Current
0.4 mA
Grid 2 Current
0.3 mA

Characteristic

Transconductance
500 uS
Plate Resistance
0.35 Mohm