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

Power - Triode ·Triode-Triode

7236

Long-life low-mu double triode designed particularly as a computer power amplifier. Each section combines high transconductance, substantial current capability, and moderate plate dissipation for dependable continuous operation in computer and control equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
IO
Base pins
-
Nominal heater
6.3 V / 2.4 A

Description

THE 7236 IS A LOW MU DOUBLE TRIODE INTENDED FOR LONG LIFE SERVICE AS A

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
IO
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
2.4 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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0125 S
Amplification factor
4.8
Max plate voltage
300 V
Max plate dissipation
15 W
Max cathode current
190 mA

Representative row for electrically identical repeated sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0125 S
Amplification factor
4.8
Max plate voltage
300 V
Max plate dissipation
15 W
Max cathode current
190 mA

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Service

    Computer power amplifier

  • Plate Voltage

    120 V

    EachTriode

Characteristic

  • Plate Current

    100 mA

    EachTriode

Capacitance

  • Input Capacitance

    9 pF

    EachUnit

  • Grid To Plate Capacitance

    10 pF

    EachUnit

Data set 02

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    2.4 A

    Nominal

  • Maximum plate voltage

    300 V

    Promoted published value

  • Maximum plate dissipation

    15 W

    Promoted published value

  • Maximum cathode current

    190 mA

    Promoted published value

  • HEATER VOLTAGE

    3 V

    RATINGS

  • MAXIMUM PLATE VOLTAGE 3OO VOLTS

    3 V

    RATINGS

  • MAXIMUM PLATE CURRENT PER PLATE 19O MA.

    19 mA

    RATINGS

  • MAXIMUM PLATE DISSIPATION PER PLATE

    15 W

    RATINGS

  • MAXIMUM GRID RESISTANCE

    0.25 mA

    RATINGS

  • MAXIMUM BULB TEMPERATURE A

    150 mA

    RATINGS

  • MAXIMUM POSITIVE GRID VOLTAGE +1 VOLT

    1 mA

    RATINGS

  • MAXIMUM NEGATIVE GRID VOLTAGE

    100 V

    RATINGS

  • MAXIMUM HEATER —CATHODE VOLTAGE

    100 V

    RATINGS

  • HEATER VOLTAGE 6.315% VOLTS

    6.315 V

    TypICAL OPERATING CONDITIONS AND CHARACTERISTICS

  • HEATER CURRENT

    2.4 A

    TypICAL OPERATING CONDITIONS AND CHARACTERISTICS

  • PLATE VOLTAGE 12O 6O 15O VOLTS

    15 V

    TypICAL OPERATING CONDITIONS AND CHARACTERISTICS

  • DC GRID VOLTAGE -14 0

    -24 V

    TypICAL OPERATING CONDITIONS AND CHARACTERISTICS

  • PLATE CURRENT 100 150 6O MA.

    6 mA

    TypICAL OPERATING CONDITIONS AND CHARACTERISTICS

  • AMPLIFICATION FACTOR 4,B ___ _

    4 A

    TypICAL OPERATING CONDITIONS AND CHARACTERISTICS

Characteristic

  • Transconductance

    12500 uS

    Promoted published value

  • Amplification factor

    4.8

    Promoted published value