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Voltage - Dual Triode (similar) ·Triode-Triode

6211

Medium-mu twin triode intended for voltage amplification and related electronic service, with two similar sections and published Class-A operating characteristics.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9A
Socket code: B9A
Base pins: 9
Nominal heater: 12.6 V / 150 mA

Description

Miniature medium-mu twin triode designed for frequency-divider circuits in electronic computers and other on-off control applications involving long cutoff periods.

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: 9A
Socket code: B9A
Base pins: 9
Nominal heater voltage: 12.6 V
Nominal heater current: 150 mA
Parallel heater voltage: 6.3 V
Parallel heater current: 300 mA
Series capable: Yes

9A - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN12P	B	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN22G1	B	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN32K	B	K — Cathode EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN4H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN5H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN61P	A	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN71G1	A	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN81K	A	K — Cathode EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A
PIN9HCT	—	HCT — Heater Center Tap EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 9A

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 7500 Ω
Transconductance: 0.0036 S
Amplification factor: 27
Max plate voltage: 200 V
Max plate dissipation: 1 W
Max grid dissipation: 0.01 W
Max cathode current: 16 mA

Representative electrical row for repeated identical physical sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 7500 Ω
Transconductance: 0.0036 S
Amplification factor: 27
Max plate voltage: 200 V
Max plate dissipation: 1 W
Max cathode current: 16 mA

Second physical triode restored.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Class A plate voltage
100 V
ClassA
Class A plate current
4.6 mA
ClassA

Data set 02

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

Application
Industrial long-life amplifier

Other

Heater operation
Series or parallel

Data set 03

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Input capacitance
2.9 pF
Output capacitance
0.54 pF
Section1
Grid-to-plate capacitance
2.22 pF
Output capacitance
0.462 pF
Section2

Other

Plate voltage
100 V
ClassA
Cathode-bias resistor
470 ohm
ClassA
Plate current
4.6 mA
ClassA
Plate voltage
150 V
FrequencyHalter
Grid voltage
0 V
FrequencyHalter
Plate current
4.8 mA
FrequencyHalter
Input plate resistance
47000 ohm
FrequencyHalter
Anode load resistance
47000 ohm
FrequencyHalter
Output load resistance
20000 ohm
FrequencyHalter

Characteristic

Plate resistance
7500 ohm
Transconductance
3600 uS
Amplification factor
27

Data set 04

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater Voltage
6.3 V
Heater Current
300 mA
Application
Frequency divider
Computer

Data set 05

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
100 V
VoltageAmplifier;EachSection
Cathode resistor
470 Ω
VoltageAmplifier;EachSection
Plate current
4.6 mA
VoltageAmplifier;EachSection

Characteristic

Plate resistance
7500 Ω
EachSection
Transconductance
3600 µS
EachSection
Amplification factor
27
EachSection

Data set 06

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
600 mA
Plate Voltage
100 V
Plate Current
4.6 mA
Transconductance
3600 uS
Plate Resistance
7800 ohm
Amplification Factor
28

Data set 07

1963 Philips Electron Tubes Handbook V1

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Grid capacitance
2.6 pF
EachSection
Plate capacitance
0.4 pF
EachSection
Grid-to-plate capacitance
2.5 pF
EachSection

Other

Plate voltage
100 V
ComputerCircuit;EachSection
Cathode resistor
470 Ω
ComputerCircuit;EachSection
Plate current
4.6 mA
ComputerCircuit;EachSection
Application
Computer circuits with prolonged cutoff operation
Section1

Characteristic

Transconductance
3600 µS
EachSection
Plate resistance
7800 Ω
EachSection
Amplification factor
28
EachSection
Life expectancy
5000 h
ComputerCircuit

Data set 08

1963 Philips Electron Tubes Handbook V3

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage
6.3 V
Vf = 6.3 V 12.6V
Heater current
300 mA
If = 300 mA 150 mA
Plate voltage
85 V
Va = 85T V
Plate current
16 mA
Ia = 16 12-20 7.2 mA
Heater voltage
6.3 V
Vf = 6.3V Ra = 4.3 kQ
Load resistance
4.3 kohm
Vf = 6.3V Ra = 4.3 kQ
Plate supply voltage
150 V
Vba = 150 V Rg = 1.8 MC

Capacitance

Grid capacitance
2.6 pF
Cg = 2.6 2.1- 3.1 pF Cg' = 2.6 2.1- 3.1 pF
Plate capacitance
0.4 pF
Ca = 0.4 0.25-0.55 pF Ca' = 0.35 j0.23-0.47 pF
Grid-to-plate capacitance
2.5 pF
Cag = 2.5 2.0- 3.0 pF Ca'g' = 2.5 2.0- 3.0 pF
Cathode-heater capacitance
2.8 pF
Ckf = 2.8 pF Ck'f = 2.8 pF
Heater voltage
6.3 V
Vf 6.3 I I V
Heater current
300 mA
If = 300 285-315 285-315 mA

Other

Plate voltage
100 V
Va 100 V Va = 150 V
Cathode resistor
470 ohm
Rk = 470 Q Vg = -10 V
Plate current
4.6 mA
Ia = 4.6 3.6-5.6 mA Ia = <100 100 µA
Transconductance
3.6 mA/V
S = 3.6 2.7-4.5 1.6 mA/V
Plate voltage
100 V
Ri = 7.8 kQ Va = 100 V
Plate resistance
7.8 kohm
Ri = 7.8 kQ Va = 100 V
Amplification factor
28
µ = 28 Vg = -2 V
Heater voltage
12.6 V
Vf = 12.6V±5%
Transconductance
5 mA/V
S5

Data set 09

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
6.3 V
Nominal
Heater current
300 mA
Nominal
Heater voltage series
12.6 V
Series
Heater current series
150 mA
Series
Heater voltage parallel
6.3 V
Parallel
Heater current parallel
300 mA
Parallel
Maximum plate voltage
200 V
Promoted published value
Maximum plate dissipation
1 W
Promoted published value
Maximum cathode current
16 mA
Promoted published value
grid of unit No
0.06 mA
Direct Interelectrode Capacitances:°
Plate-Supply Vcltage
100 V
Characteristics, Class Ai Amplifier (Each Unit):
Cathode Resistor
470 ohm
Characteristics, Class Ai Amplifier (Each Unit):
Plate Resistance (Approx.)
7500 ohm
Characteristics, Class Ai Amplifier (Each Unit):
Transconductance
3600 uS
Characteristics, Class Ai Amplifier (Each Unit):
Plate Current
4.6 mA
Characteristics, Class Ai Amplifier (Each Unit):
of 150 volts and plate current of 100 µamp. . -8 volts
-8 V
Characteristics, Class Ai Amplifier (Each Unit):
PLATE VOLTAGE
200 V
Maximum Ratings, Absolute Values:
DC POSITIVE GRiD CURRENT
2 mA
Maximum Ratings, Absolute Values:
DC CATHODE CURRENT
16 mA
Maximum Ratings, Absolute Values:
PLATE DISSIPATION
1 W
Maximum Ratings, Absolute Values:
Heater negative with respect to cathode
180 V
Maximum Ratings, Absolute Values:
Heater positive with respect to cathode
180 V
Maximum Ratings, Absolute Values:
For cathode-bias operation
0.5 megohm
Maximum Ratings, Absolute Values:

Characteristic

Plate resistance
7500 ohm
Promoted published value
Transconductance
3600 uS
Promoted published value
Amplification factor
27
Promoted published value
Voltage
5 V
Current
300 mA

Data set 10

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Anode current
4.6 mA
Typical per triode
Anode-grid capacitance
2.5 pF
Interelectrode
Grid capacitance
2.6 pF
Interelectrode