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Voltage - Triode (single) ·Triode

8081

Metal-ceramic high-mu planar triode intended primarily for low-level audio-frequency amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 220 mA

Description

Metal-ceramic high-mu planar triode primarily for low-level audio-frequency amplification.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
220 mA
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
57000 Ω
Transconductance
0.0014 S
Amplification factor
80
Max plate voltage
275 V
Max plate dissipation
0.85 W
Max cathode current
3.8 mA

Promoted fields mapped by printed headings; additional data retained in parameters.

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

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

  • Primary application

    Low-level audio-frequency amplification

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater Voltage, AC.or DC+ 6

    310.3 V

    Published datasheet line; semantic text-layer recovery

  • Heater Current# ’

    220 mA

    Published datasheet line; semantic text-layer recovery

  • Grid to Plate: (g to p)

    1 pF

    Published datasheet line; semantic text-layer recovery

  • Grid to Heater and Cathode: g to (h + k)

    1.5 pF

    Published datasheet line; semantic text-layer recovery

  • to Heater and Cathode: p to (h + k)

    0.03 pF

    Published datasheet line; semantic text-layer recovery

  • Heater to Cathode: (h to k)

    1.5 pF

    Published datasheet line; semantic text-layer recovery

  • DC Plate Voltage : ,

    275 V

    Published datasheet line; semantic text-layer recovery

  • Peak Plate Voltage

    400 V

    Published datasheet line; semantic text-layer recovery

  • Positive Peak and DC Grid Voltage o

    0 V

    Published datasheet line; semantic text-layer recovery

  • Plate Dissipation : ©

    0.85 W

    Published datasheet line; semantic text-layer recovery

  • ‘ Heater Positive with Respect to Cathode

    50 V

    Published datasheet line; semantic text-layer recovery

  • Heater Negative with Respect to Cathode

    50 V

    Published datasheet line; semantic text-layer recovery

  • Plate Voltage

    150 V

    Published datasheet line; semantic text-layer recovery

  • Cathode~-Bias Resistor

    1000 Ohm

    Published datasheet line; semantic text-layer recovery

  • Ib = 10 Microamperes, Eb =

    250 V

    Published datasheet line; semantic text-layer recovery

  • Ib = 10 Microamperes, Eb =

    4.7 V

    Published datasheet line; semantic text-layer recovery

  • + Heater current of a bogey tube at Ef =

    6.3 V

    Published datasheet line; semantic text-layer recovery

  • tube, turned

    90 deg

    Published datasheet line; semantic text-layer recovery

Characteristic

  • Plate Resistance, approximate

    57000 Ohm

    Published datasheet line; semantic text-layer recovery

  • Transconductance

    1400 uS

    Published datasheet line; semantic text-layer recovery