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Voltage Pentode - Remote Cutoff (single) ·Pentode

1D5GP

Directly heated remote-cutoff RF pentode designed for Class A high-frequency amplification. Its variable-mu characteristic permits controlled gain in battery-operated receiver stages while maintaining low filament power requirements.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
5Y
Socket code
UX5
Base pins
5
Nominal heater
2 V / 60 mA

Description

Remote-cutoff RF directly heated pentode for Class A RF amplification.

Socket description

Small 5-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5Y
Socket code
UX5
Base pins
5
Nominal heater voltage
2 V
Nominal heater current
60 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5Y - 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
1000000 Ω
Transconductance
0.00077 S
Amplification factor
700
Max plate voltage
180 V
Max screen voltage
67.5 V

Promoted characteristics use first listed typical condition; 180 V plate value is explicitly marked max in table.

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

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    90 V

    ClassA

  • Screen voltage

    67.5 V

    ClassA

  • Grid bias

    -3 V

    ClassA

  • Plate current

    2.2 mA

    PlateVoltage=90V

  • Screen current

    0.9 mA

    PlateVoltage=90V

  • Plate voltage

    180 V

    ClassA

  • Plate current

    2.3 mA

    PlateVoltage=180V

  • Screen current

    0.8 mA

    PlateVoltage=180V

Characteristic

  • Plate resistance

    0.6 MOhm

    PlateVoltage=90V

  • Transconductance

    720 uS

    PlateVoltage=90V

  • Plate resistance

    1 MOhm

    PlateVoltage=180V

  • Transconductance

    750 uS

    PlateVoltage=180V

  • Transconductance at -15 V bias

    15 uS

Capacitance

  • Grid-to-plate capacitance

    - to 0.007 pF

    WithTubeShield; Maximum

  • Input capacitance

    6.2 pF

  • Output capacitance

    12 pF

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Maximum plate voltage

    180 V

  • Maximum screen-grid voltage

    67.5 V

  • Plate voltage

    180 V

    ClassA RFAmplifier

  • Screen-grid voltage

    67.5 V

    ClassA RFAmplifier

  • Control-grid voltage

    -3 V

    ClassA RFAmplifier

  • Plate current

    2.3 mA

    ClassA RFAmplifier

  • Screen-grid current

    0.8 mA

    ClassA RFAmplifier

  • Plate resistance

    1000000 Ohm

    ClassA RFAmplifier

  • Transconductance

    750 uS

    ClassA RFAmplifier

Capacitance

  • Input capacitance

    5 pF

  • Output capacitance

    11 pF

  • Grid-to-plate capacitance

    0.007 pF

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Filament Voltage

    2 V

    Nominal

  • Filament Current

    60 mA

    Nominal

  • Plate Voltage

    90 V

    ClassA;PlateVoltage=90V

  • Screen Voltage

    67.5 V

    ClassA;PlateVoltage=90V

  • MinimumControlGridVoltage

    -3 V

    ClassA;PlateVoltage=90V

  • Plate Current

    2.3 mA

    ClassA;PlateVoltage=90V

  • Screen Current

    0.9 mA

    ClassA;PlateVoltage=90V

  • Plate Voltage

    180 V

    ClassA;PlateVoltage=180V

  • Screen Voltage

    67.5 V

    ClassA;PlateVoltage=180V

  • MinimumControlGridVoltage

    -4 V

    ClassA;PlateVoltage=180V

  • Plate Current

    2.5 mA

    ClassA;PlateVoltage=180V

  • Screen Current

    0.8 mA

    ClassA;PlateVoltage=180V

Capacitance

  • ControlGridToPlateCapacitance

    0.007 pF

    WithExternalShield;Maximum

  • Input Capacitance

    5 pF

  • Output Capacitance

    11 pF

Characteristic

  • Plate Resistance

    600000 ohm

    ClassA;PlateVoltage=90V

  • Transconductance

    720 uS

    ClassA;PlateVoltage=90V

  • Amplification Factor

    425

    ClassA;PlateVoltage=90V

  • ControlGridVoltageForTransconductance15uS

    -20 V

    ClassA;PlateVoltage=90V

  • Plate Resistance

    1000000 ohm

    ClassA;PlateVoltage=180V

  • Transconductance

    750 uS

    ClassA;PlateVoltage=180V

  • Amplification Factor

    700

    ClassA;PlateVoltage=180V

  • ControlGridVoltageForTransconductance15uS

    -19 V

    ClassA;PlateVoltage=180V