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Power - TV Vertical Output ·Triode-Triode

6DN7

Dual triode intended for television vertical-deflection service, combining oscillator/driver and power-output functions where applicable. Manufacturer data emphasize vertical-sweep operation, pulse-voltage capability, and the stronger section’s current and dissipation requirements.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 8BD
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 900 mA

Description

The 6DN7 combines a vertical-deflection oscillator triode with a higher-power vertical-deflection amplifier triode.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8BD
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 900 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8BD - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN12G1	B	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BD
PIN22P	B	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BD
PIN32K	B	K — Cathode EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BD
PIN41G1	A	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BD
PIN51P	A	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BD
PIN61K	A	K — Cathode EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BD
PIN7H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BD
PIN8H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BD

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 9000 Ω
Transconductance: 0.0025 S
Amplification factor: 22.5
Max plate voltage: 350 V
Max plate dissipation: 1 W
Max cathode current: 20 mA

Higher-mu section.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 2000 Ω
Transconductance: 0.0077 S
Amplification factor: 15.4
Max plate voltage: 550 V
Max plate dissipation: 10 W
Max cathode current: 50 mA

Section 2 vertical-deflection amplifier; 2500 V pulse limit retained as parameter.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Voltage
250 V
Published operating/characteristic table
Grid Voltage
-9.5 V
Published operating/characteristic table

Characteristic

Plate Current
41 mA
Published operating/characteristic table
Transconductance
7700 uS
Published operating/characteristic table
Amplification Factor
15.4
Published operating/characteristic table
Plate Resistance
2000 ohm
Published operating/characteristic table

Data set 02

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
TVVerticalDeflection
Grid voltage
-8 V
TVVerticalDeflection
Plate current
8 mA
TVVerticalDeflection

Capacitance

Grid-to-plate capacitance
4 pF
Input capacitance
2.2 pF
Output capacitance
0.7 pF

SECTION 2

Triode

Other

Plate voltage
250 V
TVVerticalDeflection
Grid voltage
-9.5 V
TVVerticalDeflection
Plate current
41 mA
TVVerticalDeflection

Capacitance

Grid-to-plate capacitance
5.5 pF
Input capacitance
4.6 pF
Output capacitance
1 pF

Data set 03

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

HeaterVoltageNominal
6.3 V
HeaterCurrentNominal
900 mA

Characteristic

Plate Resistance
9000 Ohm
Transconductance
2500 uS
Amplification Factor
22.5

SECTION 2

Triode

Characteristic

Plate Resistance
2000 Ohm
Transconductance
7700 uS
Amplification Factor
15.4

Other

Peak Positive Pulse Plate Voltage
2500 V
VerticalDeflection
Peak Cathode Current
150 mA
VerticalDeflection

Data set 04

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
6.3 V
Heater current
900 mA
Plate voltage
250 V
Section1;ClassA
Grid voltage
-8 V
Section1;ClassA
Plate current
8 mA
Section1;ClassA

Characteristic

Amplification factor
22.5
Section1
Plate resistance
9000 ohm
Section1
Transconductance
2500 uS
Section1

Capacitance

Grid-to-plate capacitance
4 pF
Section1

SECTION 2

Triode

Other

Plate voltage
250 V
Section2;ClassA
Grid voltage
-9.5 V
Section2;ClassA
Plate current
41 mA
Section2;ClassA

Characteristic

Amplification factor
15.4
Section2
Plate resistance
2000 ohm
Section2
Transconductance
7700 uS
Section2

Capacitance

Grid-to-plate capacitance
5.5 pF
Section2

Data set 05

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
260 V
ClassA
Grid voltage
-8 V
ClassA
Plate current
8 mA
ClassA

SECTION 2

Triode

Other

Plate voltage
250 V
ClassA
Grid voltage
-9.5 V
ClassA
Plate current
41 mA
ClassA
Peak positive-pulse plate voltage
2500 V
VerticalDeflection
Average cathode current
50 mA
VerticalDeflection