Alternatives & variations Download PDF datasheet

Voltage - Dual Triode (similar) ·Triode-Triode

6SN7GTB

Medium-mu twin triode with controlled heater warm-up for television deflection oscillators, multivibrators, and general resistance-coupled amplification. Matched sections combine familiar 6SN7 gain with substantial pulse-voltage capability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: RETMA 8BD
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 600 mA

Description

Medium-mu twin triode used in television deflection oscillators, multivibrators, and resistance-coupled amplifiers. Explicit heater variant/co-designation of 12SN7GTA in the approved source.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: RETMA 8BD
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

RETMA 8BD - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 7700 Ω
Transconductance: 0.0026 S
Amplification factor: 20
Max plate voltage: 450 V
Max plate dissipation: 5 W
Max cathode current: 20 mA

Representative row for identical sections; each-plate maximum dissipation is 5 W, total both plates 7.5 W.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 7700 Ω
Transconductance: 0.0026 S
Amplification factor: 20
Max plate voltage: 450 V
Max plate dissipation: 5 W
Max cathode current: 20 mA

Second identical physical section; added to align physical 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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

Service
Horizontal multivibrator / phase inverter / vertical deflection

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum plate voltage
450 V
Published handbook rating
Plate voltage
250 V
ClassA OperatingPoint1
Control-grid bias
8 V
ClassA OperatingPoint1
Plate current
9 mA
ClassA OperatingPoint1
Plate voltage
90 V
ClassA OperatingPoint2
Control-grid bias
0 V
ClassA OperatingPoint2
Plate current
10 mA
ClassA OperatingPoint2
Maximum positive pulse plate voltage
1500 V
VerticalDeflection
Maximum plate dissipation
7.5 W
VerticalDeflection
Maximum DC cathode current
20 mA
VerticalDeflection

Characteristic

Plate resistance
7700 ohm
ClassA OperatingPoint1
Transconductance
2600 µS
ClassA OperatingPoint1
Amplification factor
20
ClassA OperatingPoint1
Plate resistance
6700 ohm
ClassA OperatingPoint2
Transconductance
3000 µS
ClassA OperatingPoint2
Amplification factor
20
ClassA OperatingPoint2
Heater voltage
6.3 V
Published heater rating
Heater current
600 mA
Published heater rating

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Plate Resistance
7700 ohm
AlternateOperatingPoint
Transconductance
2600 uS
AlternateOperatingPoint

Data set 04

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater Voltage
6.3 V
Heater Current
600 mA
ControlledWarmupHeater
1 boolean
Heater Warmup Time
11 s
Grid To Plate Capacitance
4 pF
Input Capacitance
2.2 pF
Output Capacitance
0.1 pF
Plate Voltage
250 V
Grid Voltage
-8 V
Plate Current
9 mA
Plate Resistance
7700 ohm
Transconductance
2600 uS
Amplification Factor
20

Data set 05

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
250 V
ClassA
Heater_warmup_time
11 s
Section1,Section2

Characteristic

Transconductance
2600 uS
ClassA
Plate resistance
7700 ohm
ClassA
Amplification factor
20
ClassA

Capacitance

Input capacitance
3 pF
Section1
Output capacitance
3 pF
Section1

Data set 06

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Peak Positive Pulse Plate Voltage
1500 V
VerticalDeflection
Peak Negative Grid Voltage
250 V
VerticalDeflection
Peak Cathode Current
70 mA
VerticalDeflection
Total Plate Dissipation Both Plates
7.5 W
BothSections
Plate Voltage
250 V
ClassA
Grid Voltage
-8 V
ClassA
Heater Warm-up Time
10.5 s

Characteristic

Plate Current
9 mA
ClassA

Data set 07

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
6.3 V
Heater current
600 mA
Heater warm-up time
11 s
ControlledWarmup
Plate voltage
250 V
ClassA;EachSection
Grid voltage
-8 V
ClassA;EachSection
Plate current
9 mA
ClassA;EachSection
Maximum plate voltage
450 V
EachSection
Plate dissipation
5 W
EachSection

Characteristic

Plate resistance
7700 ohm
EachSection
Transconductance
2600 uS
EachSection
Amplification factor
20
EachSection

Capacitance

Grid-to-plate capacitance
3.8 pF
EachSection

Data set 08

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater Warm-up Time (Average)
11 s
TypicalOperation
Peak value
200 V
TypicalOperation;PublishedValue1
Peak value
200 V
TypicalOperation;PublishedValue2
Average value
100 V
TypicalOperation;PublishedValue1
Average value
100 V
TypicalOperation;PublishedValue2
Plate Voltage
450 V
MaximumRating
Cathode Current
20 mA
MaximumRating
For either plate
5 W
MaximumRating
For both plates with both units operating
7.5 W
MaximumRating
Grid-Circuit Resistance, for fixed-bias operation
1 megohm
MaximumCircuitValue
DC Plate Voltage
450 V
MaximumRating;PublishedValue1
DC Plate Voltage
450 V
MaximumRating;PublishedValue2
Peak Negative-Pulse Grid Voltage
400 V
MaximumRating;PublishedValue1
Peak Negative-Pulse Grid Voltage
600 V
MaximumRating;PublishedValue2
Peak Cathode Current
70 mA
MaximumRating;PublishedValue1
Peak Cathode Current
300 mA
MaximumRating;PublishedValue2
Average Cathode Current
20 mA
MaximumRating;PublishedValue1
Average Cathode Current
20 mA
MaximumRating;PublishedValue2
For either plate
5 W
MaximumRating
For both plates with both units operating
7.5 W
MaximumRating
Grid-Circuit Resistance
2.2 megohm
MaximumCircuitValue

Capacitance

Grid to Plate
4 pF
Capacitance;PublishedValue1
Grid to Plate
3.8 pF
Capacitance;PublishedValue2
Grid to Cathode and Heater
2.2 pF
Capacitance;PublishedValue1
Grid to Cathode and Heater
2.6 pF
Capacitance;PublishedValue2
Plate to Cathode and Heater
0.7 pF
Capacitance;PublishedValue1
Plate to Cathode and Heater
0.7 pF
Capacitance;PublishedValue2

Characteristic

Plate Voltage
90 V
Characteristic;PublishedValue1
Plate Voltage
250 V
Characteristic;PublishedValue2
Grid Voltage
0 V
Characteristic;PublishedValue1
Grid Voltage
-8 V
Characteristic;PublishedValue2
Plate Resistance (Approx.)
6700 ohm
Characteristic;PublishedValue1
Plate Resistance (Approx.)
7700 ohm
Characteristic;PublishedValue2
Transconductance
3000 uS
Characteristic;PublishedValue1
Transconductance
2600 uS
Characteristic;PublishedValue2
Plate Current
10 mA
Characteristic;PublishedValue1
Plate Current
9 mA
Characteristic;PublishedValue2
Plate Current (or grid voltage of —
12.5 V
Characteristic
Grid Voltage (Approx.) for plate current of
10 V
Characteristic