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Power - Triode ·Triode

20

Directly heated power-amplifier triode for the audio output stage of battery-operated receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
4D
Socket code
UX4
Base pins
4
Nominal heater
3.3 V / 132 mA

Description

Directly heated triode power amplifier for the output stage of battery-operated receivers. The supplied Raytheon manual page provides the ratings and operating characteristics used for the technical extraction.

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
4D
Socket code
UX4
Base pins
4
Nominal heater voltage
3.3 V
Nominal heater current
132 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

4D - 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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
6300 Ω
Transconductance
0.000425 S
Amplification factor
3.3
Max plate voltage
135 V
Max cathode current
6.5 mA

Published ratings and characteristics promoted from the approved datasheet.

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

1932 Cunningham Radio Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Grid-plate capacitance

    4.1 pF

    Published direct interelectrode capacitance

  • Grid-filament capacitance

    2 pF

    Published direct interelectrode capacitance

  • Plate-filament capacitance

    2.3 pF

    Published direct interelectrode capacitance

  • Load resistance

    9600 ohm

    Published operating characteristic

Data set 02

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum Plate Voltage

    135 V

    Published ratings

  • Plate Voltage

    90 V

    ClassA; Column1

  • Plate Voltage

    135 V

    ClassA; Column2

  • Grid Bias

    -16.5 V

    ClassA; Column1

  • Grid Bias

    -22.5 V

    ClassA; Column2

  • Amplification Factor

    3.3

    ClassA; Column1

  • Amplification Factor

    3.3

    ClassA; Column2

  • Plate Resistance

    8000 ohm

    ClassA; Column1

  • Plate Resistance

    6300 ohm

    ClassA; Column2

  • Transconductance

    415 uS

    ClassA; Column1

  • Transconductance

    525 uS

    ClassA; Column2

  • Plate Current

    3 mA

    ClassA; Column1

  • Plate Current

    6.5 mA

    ClassA; Column2

  • Load Resistance

    9600 ohm

    ClassA; Column1

  • Load Resistance

    6500 ohm

    ClassA; Column2

  • Power Output

    5 mW

    ClassA; Column1

  • Power Output

    45 mW

    ClassA; Column2

  • Power Output

    110 mW

    ClassA; Column3

Capacitance

  • Grid to Plate

    4.1 pF

    Published capacitance

  • Input

    2 pF

    Published capacitance

  • Output

    2.3 pF

    Published capacitance

Data set 03

193X Cunningham

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater/filament voltage

    3.3 V

    Published nominal

  • Heater/filament current

    132 mA

    Published nominal

  • Transconductance

    425 uS

    Published characteristic

  • Amplification factor

    20

    Published characteristic

  • Plate resistance

    47000 Ohm

    Published characteristic

Data set 04

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    3.3 V

    Nominal

  • HeaterCurrentNominal

    132 mA

    Nominal

  • Maximum Plate Voltage

    135 V

  • Maximum Cathode Current

    6.5 mA

Characteristic

  • Transconductance

    525 µS

    Typical

  • Amplification Factor

    3.3

    Typical

  • Plate Resistance

    6300 ohm

    Typical

Data set 05

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Input capacitance

    2 pF

  • Output capacitance

    2.3 pF

  • Grid-to-plate capacitance

    4.1 pF

  • Plate resistance

    6300 ohm

    ClassA; OperatingPoint1

  • Transconductance

    525 uS

    ClassA; OperatingPoint1

  • Amplification factor

    3.3

    ClassA; OperatingPoint1

Other

  • Plate voltage

    135 V

    ClassA; OperatingPoint1

  • Control-grid bias

    22.5 V

    ClassA; OperatingPoint1

  • Plate current

    6.5 mA

    ClassA; OperatingPoint1

  • Load resistance

    6500 ohm

    ClassA; OperatingPoint1

  • Power output

    0.11 W

    ClassA; OperatingPoint1

  • Maximum plate voltage

    135 V