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Power - Beam Single (NOT sweep) (under 10W) ·BeamPower

5992

Bendix Red Bank beam-power amplifier engineered for aircraft and industrial service, with long-life construction and extensive run-in against shock, vibration, and early failure.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7AC
Socket code
IO
Base pins
7
Nominal heater
6.3 V / 600 mA

Description

This beam power amplifier is from the Bendix Red Bank line of reliable vacuum tubes. It is specifically designed to replace the 6Vé for aircraft and industrial applications where freedom from early failure, long average service life, and uniform operating characteristics are extremely important. Each tube is given a 45-hour run-in under var- ious overload, vibration, and shock conditions likely to be encountered in service. This run-in serves to reduce early failures by eliminating tubes with any minor defects that might lead to failure under actual operating conditions. The use of a coil type heater inside an extruded alu- mina insulator gives a long life heater structure which stands up well under high heater to cathode voltage. The short mount, the heavy side rods on the grids, and the multiple supports on the cage give an improved structure which maintains rigidity under shock and vibration. The tube requires an 8-pin octal socket and can be mounted in any position.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7AC
Socket code
IO
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7AC - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1Pin 1—NCVerified

12L6GT/25L6GT manufacturer basing, 7AC

PIN2Pin 2—H — HeaterVerified

12L6GT/25L6GT manufacturer basing, 7AC

PIN3Pin 3AP — Plate (Anode)Verified

12L6GT/25L6GT manufacturer basing, 7AC

PIN4Pin 4AG2 — Screen GridVerified

12L6GT/25L6GT manufacturer basing, 7AC

PIN5Pin 5AG1 — Control GridVerified

12L6GT/25L6GT manufacturer basing, 7AC

PIN7Pin 7—H — HeaterVerified

12L6GT/25L6GT manufacturer basing, 7AC

PIN8Pin 8ABP — Beam-Forming PlateGroup AC8Verified

12L6GT/25L6GT manufacturer basing, 7AC

PIN8Pin 8AK — CathodeGroup AC8Verified

12L6GT/25L6GT manufacturer basing, 7AC

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
45000 Ω
Transconductance
0.0035 S
Max plate voltage
300 V
Max screen voltage
275 V
Max plate dissipation
2.82 W
Max screen dissipation
1.32 W
Max cathode current
100 mA

Published characteristics and ratings promoted where clearly recoverable from source.

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

  • Plate Voltage

    250 V

    ClassA

  • Screen Voltage

    250 V

    ClassA

  • Grid Voltage

    -12.5 V

    ClassA

  • Plate Current

    45 mA

    ClassA

  • Screen Current

    4.5 mA

    ClassA

  • Load Resistance

    5000 ohm

    ClassA

  • Power Output

    4 W

    ClassA

Data set 02

196X Bendix

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • Heater Current

    600 mA

    Published datasheet value; see source context.

  • Plate Current

    70 mA

    Published datasheet value; see source context.

  • Transconductance

    3500 µS

    Published datasheet value; see source context.

Other

  • Plate Voltage

    300 V

    Published datasheet value; see source context.

  • Cathode Current

    100 mA

    Published datasheet value; see source context.