Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Voltage Pentode - Sharp Cutoff (single) ·Pentode

8084

Frame-grid sharp-cutoff VHF pentode designed for frequency multiplication, amplification, and oscillator service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7G
Base pins
7
Nominal heater
13.5 V / 160 mA

Description

Frame-grid sharp-cutoff VHF pentode for frequency multiplier, amplifier, and oscillator service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B7G
Base pins
7
Nominal heater voltage
13.5 V
Nominal heater current
160 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

Pentode

X-ray radiationInterelectrode capacitances
Transconductance
0.012 S
Max plate voltage
250 V
Max screen voltage
200 V
Max plate dissipation
2.3 W
Max screen dissipation
0.5 W
Max cathode current
20 mA

Published electrical limits and characteristics promoted from the approved source; non-schema quantities are retained in TUBE_SECTION_PARAMETER.

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

1947 Westinghouse

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    13.5 V

    Nominal

  • MaximumPlateOrOperatingVoltage

    250 V

  • Maximum Screen Voltage

    200 V

  • Heater Voltage

    13.5 V

    Nominal

Characteristic

  • Transconductance

    12000 µS

    Typical

  • FrequencyMultiplierServiceMaximum

    75 MHz

    Tripler service

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater Voltage

    13.5 V

  • Heater Current

    160 mA

  • Heater Voltage Minimum

    11.8 V

  • Heater Voltage Maximum

    15.5 V

  • Grid To Plate Capacitance

    0.04 pF

  • Input Capacitance

    8 pF

  • Output Capacitance

    3 pF

  • Plate Voltage

    125 V

  • Screen Voltage

    80 V

  • Grid Voltage

    -1 V

  • Transconductance

    10500 uS

  • GridCutoffBias

    -3.5 V

  • Plate Current

    7 mA

  • Screen Current

    1.7 mA

  • FrameGridConstruction

    1 boolean

Other

  • Power Output

    0.45 W

    ClassC;FrequencyTripler;75MHz

  • MaximumOperatingFrequency

    75 MHz

    FrequencyTripler