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Voltage - Triode (single high frequency) ·Triode

6AJ4

High-frequency triode for UHF/VHF amplification, mixing, or oscillator service in television, FM, communications, or specialized RF equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9BX
Socket code
-
Base pins
-
Nominal heater
6.3 V / 225 mA

Description

High-transconductance triode for grounded-grid RF amplification.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
9BX
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
225 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9BX - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G1AG1 — Control Grid

EIA source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9BX

PIN2KAK — Cathode

EIA source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9BX

PIN3G1AG1 — Control Grid

EIA source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9BX

PIN4G1AG1 — Control Grid

EIA source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9BX

PIN5PAP — Plate (Anode)

EIA source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9BX

PIN6G1AG1 — Control Grid

EIA source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9BX

PIN7H—H — Heater

EIA source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9BX

PIN8H—H — Heater

EIA source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9BX

PIN9G1AG1 — Control Grid

EIA source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9BX

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
4200 Ω
Transconductance
0.01 S
Amplification factor
42
Max plate voltage
150 V
Max plate dissipation
2 W
Max cathode current
20 mA

Published ratings/characteristics promoted where clearly stated; repeated identical sections compressed where applicable.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater voltage

    6.3 V

    Published nominal value

  • Heater current

    225 mA

    Published nominal value

  • Transconductance

    10000 µS

    Published operating characteristic

Other

  • Maximum plate dissipation

    2 W

    Published maximum rating

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    125 V

    ClassA

  • Cathode resistor

    68 ohm

    ClassA

  • Plate current

    16 mA

    ClassA