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Power - Beam (NOT sweep) ·BeamPower-BeamPower

26A7GT

Twin beam-power amplifier designed for push-pull or parallel output service in aircraft and mobile equipment operating from approximately 28-volt heater and plate supplies.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
8BU
Socket code
IO
Base pins
8
Nominal heater
26.5 V / 600 mA

Description

The 26A7GT is a cathode-type twin beam-power amplifier intended for push-pull or parallel-connected output service in aircraft or mobile equipment where both heater and plate supplies are limited to about 28 volts.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8BU
Socket code
IO
Base pins
8
Nominal heater voltage
26.5 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8BU - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN11G1AG1 — Control Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

PIN21G3AG3 — Suppressor GridGroup 8BU2

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

PIN2KAK — CathodeGroup 8BU2

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

PIN22G3BG3 — Suppressor GridGroup 8BU2

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

PIN32G1BG1 — Control Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

PIN42PBP — Plate (Anode)

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

PIN51G2AG2 — Screen GridGroup 8BU5

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

PIN52G2BG2 — Screen GridGroup 8BU5

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

PIN6H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

PIN7H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

PIN81PAP — Plate (Anode)

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BU

Section ratings

2 physical sections, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances
Transconductance
0.0057 S
Max plate voltage
50 V
Max screen voltage
50 V
Max plate dissipation
2 W
Max screen dissipation
0.5 W
Rectifier max heater-cathode voltage
90 V

Representative row for two identical beam-power units.

Section 2

Beam Power

X-ray radiationInterelectrode capacitances
Transconductance
0.0057 S
Max plate voltage
50 V

Published promoted values applied where semantically applicable; additional table values retained in section 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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Maximum plate voltage

    50 V

    Published handbook rating

  • Maximum screen voltage

    50 V

    Published handbook rating

  • Plate voltage

    26.5 V

    ClassA

  • Screen voltage

    26.5 V

    ClassA

  • Control-grid bias

    4.5 V

    ClassA

  • Plate current

    20 mA

    ClassA

  • Screen current

    1.9 mA

    ClassA

  • Load resistance

    1500 ohm

    ClassA

  • Power output

    0.18 W

    ClassA

Characteristic

  • Transconductance

    5700 µS

    Published handbook characteristic

  • Heater/filament voltage

    26.5 V

    Published heater/filament rating

  • Heater/filament current

    600 mA

    Published heater/filament rating

Capacitance

  • Input capacitance

    16 pF

    Published capacitance column

  • Output capacitance

    13 pF

    Published capacitance column

  • Grid-to-plate capacitance

    1.2 pF

    Published capacitance column

Data set 02

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Plate voltage

    50 V

    ClassA1

  • Screen supply

    26.5 V

    ClassA1

  • Grid bias

    -4.5 V

    ClassA1

  • Screen current

    1.9 mA

    ClassA1

  • Plate current

    20 mA

    ClassA1

  • Power output

    0.18 W

    ClassA1

  • Grid bias

    -7 V

    ClassAB

  • Screen current

    2 mA

    ClassAB

  • Plate current

    19 mA

    ClassAB

  • Power output

    0.54 W

    ClassAB

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Maximum Signal Power Output

    165 mW

    ClassA1;EachUnit

  • Maximum Signal Power Output

    500 mW

    ClassB;TwoUnits

Data set 04

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • Grid-to-plate capacitance each unit

    1.2 pF

    WholeTube

  • Input capacitance each unit

    16 pF

    WholeTube

  • Output capacitance each unit

    13 pF

    WholeTube

Other

  • Plate voltage each unit

    50 V

    WholeTube

  • Screen voltage each unit

    50 V

    WholeTube

  • Plate dissipation each unit

    2 W

    WholeTube

  • Screen dissipation each unit

    0.5 W

    WholeTube

  • Plate voltage

    26.5 V

    ClassA1 OneTube

  • Transconductance

    5700 µS

    ClassA1 OneTube

  • Load resistance

    1500 ohm

    ClassA1 OneTube

  • Maximum signal power output

    0.165 W

    ClassA1 OneTube

  • Plate voltage

    26.5 V

    PushPull ClassAB1 TwoTubes

Data set 05

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristics

  • Voltage

    26.5 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Current

    0.6

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid No.l to plate•

    12

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • grid No.2, and heater•

    16

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • grid No.2, and heater•

    13

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • grid No.1 of unit No.2

    2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • plate of unit No.2

    2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • plate of unit No.l

    2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 1 - Grid No.l of — published value 1

    1

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 1 - Grid No.l of — published value 2

    4

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • No.l & No.2

    6

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 3 - Grid No.1 of — published value 1

    3

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 3 - Grid No.1 of — published value 2

    7

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Unit No.2

    8

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PLATE VOLTAGE

    50 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Voltage — published value 1

    26 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Voltage — published value 2

    5 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.2 Voltage — published value 1

    26 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.2 Voltage — published value 2

    5 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.l (Control rid) Voltage — published value 1

    -4 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.l (Control rid) Voltage — published value 2

    5 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Peak AF Grid~Jo.l Voltage

    45 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Zero-Signal Plate Current

    20 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Zero-Signal Grid-No.2 Current — published value 1

    1 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Zero-Signal Grid-No.2 Current — published value 2

    9 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Transconductance

    5700

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Load Resistance

    1500 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID-No.2 (SCREEN) VOLTAGE

    50 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.l (Control-Grid) Voltage

    -7 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid No.l Voltage

    14 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Zero-Signal Plate Current

    19 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Zero—Signal Grid—No.2 Current (Approx.)

    2 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • (Plate to plate)

    2500 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • HEATER VOLTS=GRID-Ns2 VOLTS=26.5

    26.5 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • HEATER VOLTS =26.5

    26.5 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Other

  • GRID-N o.2 (SCREEN) VOLTAGE

    50 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PLATE DISSIPATION

    2 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID-No.2 INPUT — published value 1

    0 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID-No.2 INPUT — published value 2

    5 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater negative with respect to cathode

    90 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater positive with respect to cathode

    90 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.-Signal Plate Current — published value 1

    20 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.-Signal Plate Current — published value 2

    5 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.-Signal Grid-No.2 Current

    55 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.-Signal Power Output

    180

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • With cathode bias — published value 1

    0 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • With cathode bias — published value 2

    5 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • With fixed bias — published value 1

    0 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • With fixed bias — published value 2

    1 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • With grid-resistor bias — published value 1

    0 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • With grid-resistor bias — published value 2

    5 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PLATE VOLTAGE

    50 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PLATE DISSIPATION (Per unit)

    2 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID-No.2 INPUT (Per unit) — published value 1

    0 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID-No.2 INPUT (Per unit) — published value 2

    5 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.—Signal Plate Current

    30 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.—Signal Grid—No.2 Current (Approx.)

    8.5 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.—Signal Power Output

    500

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • With cathode bias

    0.5 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • With fixed bias

    0.1 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • With grid—resistor bias

    0.5 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.