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Voltage - Triode (single) ·Triode

101D

Western Electric directly heated triode for professional electronic service. Available source material confirms its construction without establishing a narrower functional role confidently.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
UV4
Base pins
4
Nominal heater
4.5 V / 1 A

Description

The Western Electric 101D is a triode listed in the supplied catalog table.

Socket description

WD/UV 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
UV4
Base pins
4
Nominal heater voltage
4.5 V
Nominal heater current
1 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

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
5800 Ω
Transconductance
0.00107 S
Amplification factor
6.2
Max plate voltage
200 V

Low-power filamentary triode; later sheet states it replaces D-86326.

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

1933 Western Electric Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate-grid capacitance

    5 pF

    Published direct interelectrode capacitance

  • Plate-filament capacitance

    2 pF

    Published direct interelectrode capacitance

  • Grid-filament capacitance

    3.7 pF

    Published direct interelectrode capacitance

Data set 02

1956 Western Electric Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Maximum/Typical Power Output

    0.065 W

    Catalog-table value

Other

  • Maximum Plate Voltage

    200 V

    Catalog-table value

Data set 03

2026 Western Electric 100s

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Filament voltage

    4.5 V

  • Filament current

    1 A

  • Maximum plate voltage

    190 V

  • Plate voltage

    130 V

    Published operating column 1

  • Grid voltage

    -9 V

    Published operating column 1

  • Plate current

    7.4 mA

    Published operating column 1

  • Amplification factor

    6

    Published operating column 1

  • Plate resistance

    5700 ohm

    Published operating column 1

  • Power output

    65 mW

    Published operating column 1

  • Plate voltage

    130 V

    Published operating column 2

  • Grid voltage

    -9 V

    Published operating column 2

  • Plate current

    7.4 mA

    Published operating column 2

  • Amplification factor

    6

    Published operating column 2

  • Plate resistance

    5700 ohm

    Published operating column 2

  • Power output

    60 mW

    Published operating column 2

  • Plate voltage

    160 V

    Published operating column 3

  • Grid voltage

    -14 V

    Published operating column 3

  • Plate current

    7.35 mA

    Published operating column 3

  • Amplification factor

    6

    Published operating column 3

  • Plate resistance

    5800 ohm

    Published operating column 3

  • Power output

    135 mW

    Published operating column 3

  • Plate voltage

    190 V

    Published operating column 4

  • Grid voltage

    -18 V

    Published operating column 4

  • Plate current

    8.35 mA

    Published operating column 4

  • Amplification factor

    5.95

    Published operating column 4

  • Plate resistance

    5600 ohm

    Published operating column 4

  • Power output

    230 mW

    Published operating column 4

Capacitance

  • Grid-to-plate capacitance

    6.4 pF

    Based tube without socket

  • Grid-to-filament capacitance

    4.4 pF

    Based tube without socket

  • Plate-to-filament capacitance

    2.9 pF

    Based tube without socket

Characteristic

  • Plate resistance

    5800 ohm

    Representative published operating point

  • Transconductance

    1070 uS

    Representative published operating point

  • Amplification factor

    6.2

    Representative published operating point