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

6BZ7

Medium-mu twin triode for cascode VHF television-tuner amplification and push-pull cathode-drive RF amplifier service, with high transconductance for front-end use.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

Medium-mu twin triode used as a cascode amplifier in VHF television tuners and in push-pull cathode-drive RF amplifiers.

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: 5600 Ω
Transconductance: 0.0068 S
Amplification factor: 38
Max plate voltage: 250 V
Max plate dissipation: 2 W
Max cathode current: 20 mA

Each identical triode

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 5300 Ω
Transconductance: 0.0068 S
Amplification factor: 36
Max plate dissipation: 2 W

Medium-mu double triode for low-noise VHF cascode-amplifier service.

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

Maximum plate voltage
250 V
Published handbook rating
Plate voltage
150 V
ClassA
Plate current
10 mA
ClassA

Characteristic

Plate resistance
5600 ohm
Published handbook characteristic
Transconductance
6800 µS
Published handbook characteristic
Amplification factor
38
Published handbook characteristic
Heater voltage
6.3 V
Published heater rating
Heater current
400 mA
Published heater rating

Capacitance

Input capacitance
2.5 pF
Published capacitance column
Output capacitance
1.35 pF
Published capacitance column
Grid-to-plate capacitance
1.15 pF
Published capacitance column

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Voltage
150 V
Published operating/characteristic table
Grid Voltage
-7 V
Published operating/characteristic table

Characteristic

Plate Current
10 mA
Published operating/characteristic table
Transconductance
6800 uS
Published operating/characteristic table
Amplification Factor
36
Published operating/characteristic table
Plate Resistance
5300 ohm
Published operating/characteristic table

Data set 03

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Heater Voltage
6.3 V
Heater Current
400 mA

Other

Maximum Plate Voltage
250 V
Maximum Plate Dissipation
2 W

Data set 04

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

MAXIMUM PLATE DISSIPATION
2 W
Maximum Ratings | MAXIMUM PLATE DISSIPATION 2 WATTS
MAXIMUM GRID CIRCUIT RESISTANCE O
5 Mohm
Maximum Ratings | MAXIMUM GRID CIRCUIT RESISTANCE O.5 MEGOHM
Plate voltage
150 V
ClassA
Cathode bias resistor
220 ohm
ClassA
Plate current
10 mA
ClassA

Characteristic

HEATER CURRENT O
4 A
ClassA | HEATER CURRENT O.4 AMP.
Amplification factor
36
Plate resistance
5300 ohm
Transconductance
6800 uS

Capacitance

Grid-to-plate capacitance
1.2 pF
Section1
Plate-to-cathode capacitance
0.12 pF
Section1
Input capacitance
2.6 pF
Section1
Output capacitance
1.2 pF
Section1

SECTION 2

Triode

Capacitance

#
0.01 pF
Capacitances | #1 PLATE TO #2 PLATE: (1P TO 2P) (MAX.) 0.010 uuf
Grid-to-plate capacitance
1.2 pF
Section2
Plate-to-cathode capacitance
0.12 pF
Section2
Input capacitance
5 pF
Section2
Output capacitance
2.2 pF
Section2

Other

Plate voltage
150 V
ClassA
Cathode bias resistor
220 ohm
ClassA
Plate current
10 mA
ClassA

Characteristic

Amplification factor
36
Plate resistance
5300 ohm
Transconductance
6800 uS

Data set 05

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Voltage (AC or OC)
6 V
Published table column 1 of 3
Voltage (AC or OC)
3 V
Published table column 2 of 3
Voltage (AC or OC)
10 V
Published table column 3 of 3
Current at
6.3 V
Published table column 1 of 2
Current at
4 V
Published table column 2 of 2
Plate Supply Voltage
150 V
Cathode Resistor
220 Ω
Plate Resistance (Approx )
5300 Ω
Transconductance
6800 µS
Plate Current
10 mA
µa =
100 V
Published table column 1 of 2
µa =
-7 V
Published table column 2 of 2

Capacitance

Grid to plate
1.2 pF
Published table column 1 of 2
Grid to plate
1.2 pF
Published table column 2 of 2
shield, and heater
2.6 pF
shield, and heater
1.2 pF
Plate to cathode
0.12 pF
Published table column 1 of 2
Plate to cathode
0.12 pF
Published table column 2 of 2
Heater to cathode
2.6 pF
Published table column 1 of 2
Heater to cathode
2.6 pF
Published table column 2 of 2
shield, and heater
5 pF
shield, and heater
2.2 pF
plate of unit No
2 pF
Published table column 1 of 2
plate of unit No
0.01 pF
Published table column 2 of 2

Other

PLATE VOLTAGE
250 V
PLATE DISSIPATION
2 W
CATHODE CURRENT
20 mA
Heater negative with respect to cathode
2006 V
Heater positive with respect to cathode
200 V
Grid—Circuit Resistance
0 MΩ
Published table column 1 of 2
Grid—Circuit Resistance
5 MΩ
Published table column 2 of 2
pe rmisslD le for this voltage to be as high as
300 V
o The do component must not exceed
100 V

Data set 06

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater Voltage (ac/dc) 4.2 5.6
6.3 V
Published in approved 6BZ7 target datasheet entry; Section1
Heater Current 0.45
400 mA
Published in approved 6BZ7 target datasheet entry; Section1
Cathode Current
20 mA
Published in approved 6BZ7 target datasheet entry; Section1
Plate Dissipation
2 W
Published in approved 6BZ7 target datasheet entry; Section1
Plate Supply Voltage
150 V
Published in approved 6BZ7 target datasheet entry; Section1
Cathode-Bias Resistor
220 Ω
Published in approved 6BZ7 target datasheet entry; Section1
Plate Resistance (Approx.)
5900 Ω
Published in approved 6BZ7 target datasheet entry; Section1
Transconductance
6400 µS
Published in approved 6BZ7 target datasheet entry; Section1
Plate Current
9 mA
Published in approved 6BZ7 target datasheet entry; Section1
Grid-Circuit Resistance
0.5 MΩ
Published in approved 6BZ7 target datasheet entry; Section1
* Rating may be high as
300 V
Published in approved 6BZ7 target datasheet entry; Section1

Capacitance

Grid to Plate 1.2
1.2 pF
Published in approved 6BZ7 target datasheet entry; Section1
—
-5 pF
Published in approved 6BZ7 target datasheet entry; Section1
Plate to Grid, Heater, and Internal Shield
2.2 pF
Published in approved 6BZ7 target datasheet entry; Section1
Plate to Cathode 0.12
0.12 pF
Published in approved 6BZ7 target datasheet entry; Section1
Heater to Cathode 2.6
2.6 pF
Published in approved 6BZ7 target datasheet entry; Section1
* Rating: may be high as
300 V
Published in approved 6BZ7 target datasheet entry; Section1

Characteristic

For plate current of 100
-6.5 V
Published in approved 6BZ7 target datasheet entry; Section1