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Power - Beam (NOT sweep) ·BeamPower

5871

Special beam-power amplifier functionally comparable to the 6V6GT family, with published Class-A operating data supporting receiver and audio power-output service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7AC
Socket code
-
Base pins
7
Nominal heater
6.3 V / 450 mA

Description

Special beam-power amplifier equivalent in application to the 6V6-GT family.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7AC
Socket code
-
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
450 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
77000 Ω
Transconductance
0.00375 S
Max plate voltage
315 V
Max screen voltage
285 V

Promoted from clearly identified printed ratings/characteristics; additional published operating points, capacitances, and specialized ratings 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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Capacitance

  • Input capacitance

    9.5 pF

    Section1

  • Output capacitance

    7.5 pF

    Section1

  • Grid-to-plate capacitance

    0.7 pF

    Section1

Other

  • Plate voltage

    315 V

    ClassA

  • Screen voltage

    225 V

    ClassA

  • Control-grid voltage

    -13 V

    ClassA

  • Plate current

    34 mA

    ClassA

  • Screen current

    2.2 mA

    ClassA

  • Load resistance

    8500 Ω

    ClassA

  • Power output

    5.5 W

    ClassA

Characteristic

  • Plate resistance

    77000 Ω

    ClassA

  • Transconductance

    3750 µS

    ClassA