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Voltage - Dual Triode (similar high frequency) ·Triode-Triode

6BQ7

Medium-mu twin triode designed for low-noise VHF cascode and RF amplification in television tuners, with operating characteristics optimized for high-frequency reception.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9AJ
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 400 mA

Description

6BQ7 is a DualTriode device. Medium-mu twin triode for low-noise VHF cascode/RF amplifier service in television tuners.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9AJ
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 400 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9AJ - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN12P	B	P — Plate (Anode) Numbered source electrode preserved; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9AJ
PIN22G1	B	G1 — Control Grid Source label preserved; pending confirmation	Unverified EIA Base Connections, printed page 131, 9AJ
PIN32K	B	K — Cathode Numbered source electrode preserved; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9AJ
PIN4H	—	H — Heater Numbered source electrode preserved; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9AJ
PIN5H	—	H — Heater Numbered source electrode preserved; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9AJ
PIN61P	A	P — Plate (Anode) Numbered source electrode preserved; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9AJ
PIN71G1	A	G1 — Control Grid Source label preserved; pending confirmation	Unverified EIA Base Connections, printed page 131, 9AJ
PIN81K	A	K — Cathode Numbered source electrode preserved; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9AJ
PIN9IS	A	IS — Internal Screen Numbered source electrode preserved; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9AJ

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 5800 Ω
Transconductance: 0.006 S
Amplification factor: 35
Max plate voltage: 250 V
Max plate dissipation: 2 W

Representative specification for repeated identical sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 5800 Ω
Transconductance: 0.006 S
Amplification factor: 35
Max plate voltage: 250 V
Max plate dissipation: 2 W

Second identical physical triode section; added to align rows with SectionCount.

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

Triode

Other

Plate voltage
150 V
ClassA
Cathode resistor
220 Ω
ClassA
Plate current
9 mA
ClassA

Characteristic

Plate resistance
5800 Ω
ClassA
Transconductance
6000 µS
ClassA
Amplification factor
35
ClassA

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Voltage
250 V
Published operating/characteristic table

Characteristic

Transconductance
6000 uS
Published operating/characteristic table
Amplification Factor
35
Published operating/characteristic table
Plate Resistance
5800 ohm
Published operating/characteristic table

Data set 03

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
150 V
EachUnit; VHF
Plate current
9 mA
EachUnit; VHF

Characteristic

Amplification factor
39
EachUnit
Plate resistance
5.8 kOhm
EachUnit
Transconductance
6000 uS
EachUnit