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Power - Triode Single (under 10W) ·Triode

5987

Premium subminiature low-mu high-perveance power triode for compact output and driver applications requiring comparatively high current capability.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
8DM
Socket code
B8D
Base pins
8
Nominal heater
6.3 V / 450 mA

Description

Premium subminiature low-mu, high-perveance power triode.

Socket description

Subminiature 8-lead

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8DM
Socket code
B8D
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8DM - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G1AG1 — Control Grid

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8DM

PIN2PAP — Plate (Anode)

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8DM

PIN3H—H — Heater

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8DM

PIN4PAP — Plate (Anode)

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8DM

PIN5KAK — Cathode

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8DM

PIN6H—H — Heater

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8DM

PIN8PAP — Plate (Anode)

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8DM

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.00185 S
Amplification factor
4.1
Max plate voltage
165 V
Max plate dissipation
4 W

Low-mu triode; Class A characteristics and capacitances published.

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 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltaget . . . . . . . 6.0 6.3 6.6V

    6.6 V

    Heater Voltaget . . . . . . . 6.0 6.3 6.6V

  • Heater Current . . . . . . . . 450 mA

    450 mA

    Heater Current . . . . . . . . 450 mA

  • Peak Plate Forward Voltage 330 v 017" +.002"

    330 V

    Peak Plate Forward Voltage 330 v 017" +.002"

  • Plate Dissipation . 4.0W 15"

    4 W

    Plate Dissipation . 4.0W 15"

  • Transconductance . C e 1850 umhos

    1850 umhos

    Transconductance . C e 1850 umhos

  • the heater voltage to its center-rated value of 6.3 volts SYLVANIA ELECTRIC

    6.3 V

    the heater voltage to its center-rated value of 6.3 volts SYLVANIA ELECTRIC

  • Heater Voltage . . . . . . . . . . . . 63V Grid Voltage

    63 V

    Heater Voltage . . . . . . . . . . . . 63V Grid Voltage

  • 4.10.8 Heater Current:. . .. ..ot 420 450 480 mA

    480 mA

    4.10.8 Heater Current:. . .. ..ot 420 450 480 mA

  • 4.10.9 Transconductance (1):Sm. ... ... ... i 1480 1850 2220 umhos

    2220 umhos

    4.10.9 Transconductance (1):Sm. ... ... ... i 1480 1850 2220 umhos

  • 4.10.11.1 Amplification Factor:...............

    11.1 A

    4.10.11.1 Amplification Factor:...............

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Input Capacitance

    3.2 pF

  • Output Capacitance

    5 pF

  • Grid-to-Plate Capacitance

    3.2 pF

Other

  • Plate Voltage

    100 V

    ClassA

  • Grid Voltage

    -18 V

    ClassA

  • Plate Current

    9 mA

    ClassA