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Voltage - Triode (single) ·Triode

102G

Low-noise filamentary voltage-amplifier triode for sensitive professional signal amplification.

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

Description

The 102G is a filamentary voltage-amplifier triode similar to the 102D, with special precautions to minimize insulation leaks and sputter noise; it is recommended for early stages of high-gain low-frequency amplifiers.

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
2.1 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
63000 Ω
Transconductance
0.00047 S
Amplification factor
29.8
Max plate voltage
190 V

Low-noise filamentary voltage-amplifier triode; special precautions minimize insulation leaks and sputter noise.

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

2026 Western Electric 100s

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Filament voltage

    2.1 V

  • Filament current

    1 A

  • Maximum plate voltage

    190 V

  • Plate voltage

    130 V

    TypicalOperating; Point1

  • Grid voltage

    -2 V

    TypicalOperating; Point1

  • Plate current

    0.36 mA

    TypicalOperating; Point1

  • Amplification factor

    29.4

    TypicalOperating; Point1

  • Plate resistance

    80000 ohm

    TypicalOperating; Point1

  • Transconductance

    370 uS

    TypicalOperating; Point1

  • Peak output voltage

    27 V

    TypicalOperating; Point1

  • Plate voltage

    130 V

    TypicalOperating; Point2

  • Grid voltage

    -1.5 V

    TypicalOperating; Point2

  • Plate current

    0.58 mA

    TypicalOperating; Point2

  • Amplification factor

    29.8

    TypicalOperating; Point2

  • Plate resistance

    63000 ohm

    TypicalOperating; Point2

  • Transconductance

    470 uS

    TypicalOperating; Point2

  • Peak output voltage

    20 V

    TypicalOperating; Point2

  • Plate voltage

    130 V

    TypicalOperating; Point3

  • Grid voltage

    -1 V

    TypicalOperating; Point3

  • Plate current

    0.85 mA

    TypicalOperating; Point3

  • Amplification factor

    30.1

    TypicalOperating; Point3

  • Plate resistance

    53000 ohm

    TypicalOperating; Point3

  • Transconductance

    570 uS

    TypicalOperating; Point3

  • Peak output voltage

    15 V

    TypicalOperating; Point3

  • Plate voltage

    160 V

    TypicalOperating; Point4

  • Grid voltage

    -3 V

    TypicalOperating; Point4

  • Plate current

    0.34 mA

    TypicalOperating; Point4

  • Amplification factor

    29.2

    TypicalOperating; Point4

  • Plate resistance

    81000 ohm

    TypicalOperating; Point4

  • Transconductance

    360 uS

    TypicalOperating; Point4

  • Peak output voltage

    40 V

    TypicalOperating; Point4

  • Plate voltage

    160 V

    TypicalOperating; Point5

  • Grid voltage

    -2 V

    TypicalOperating; Point5

  • Plate current

    0.8 mA

    TypicalOperating; Point5

  • Amplification factor

    29.9

    TypicalOperating; Point5

  • Plate resistance

    54000 ohm

    TypicalOperating; Point5

  • Transconductance

    550 uS

    TypicalOperating; Point5

  • Peak output voltage

    28 V

    TypicalOperating; Point5

  • Plate voltage

    160 V

    TypicalOperating; Point6

  • Grid voltage

    -1 V

    TypicalOperating; Point6

  • Plate current

    1.45 mA

    TypicalOperating; Point6

  • Amplification factor

    30.3

    TypicalOperating; Point6

  • Plate resistance

    42000 ohm

    TypicalOperating; Point6

  • Transconductance

    720 uS

    TypicalOperating; Point6

  • Peak output voltage

    15 V

    TypicalOperating; Point6

  • Plate voltage

    190 V

    MaximumOperating; Point7

  • Grid voltage

    -3 V

    MaximumOperating; Point7

  • Plate current

    0.83 mA

    MaximumOperating; Point7

  • Amplification factor

    29.8

    MaximumOperating; Point7

  • Plate resistance

    54000 ohm

    MaximumOperating; Point7

  • Transconductance

    550 uS

    MaximumOperating; Point7

  • Peak output voltage

    42 V

    MaximumOperating; Point7

  • Plate voltage

    190 V

    MaximumOperating; Point8

  • Grid voltage

    -2 V

    MaximumOperating; Point8

  • Plate current

    1.46 mA

    MaximumOperating; Point8

  • Amplification factor

    30.2

    MaximumOperating; Point8

  • Plate resistance

    43000 ohm

    MaximumOperating; Point8

  • Transconductance

    700 uS

    MaximumOperating; Point8

  • Peak output voltage

    30 V

    MaximumOperating; Point8

Capacitance

  • Grid-to-plate capacitance

    5 pF

    Based tube without socket

  • Grid-to-filament capacitance

    2.9 pF

    Based tube without socket

  • Plate-to-filament capacitance

    1.7 pF

    Based tube without socket

Characteristic

  • Plate resistance

    63000 ohm

    Representative published operating point

  • Transconductance

    470 uS

    Representative published operating point

  • Amplification factor

    29.8

    Representative published operating point