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Power - TV Vertical Output ·Triode-Triode

6DR7

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
9MF
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 900 mA

Description

The 6DR7 combines a high-mu vertical oscillator section with a low-mu vertical-deflection amplifier section.

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
9MF
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
900 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9MF - 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
37000 Ω
Transconductance
0.0027 S
Amplification factor
70
Max plate voltage
330 V
Max plate dissipation
1 W
Max cathode current
20 mA

High-mu section.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
1200 Ω
Transconductance
0.01 S
Amplification factor
12
Max plate voltage
275 V
Max plate dissipation
7 W
Max cathode current
50 mA

Low-mu power/vertical-deflection section.

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

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

    -3 V

    TVVerticalDeflection

  • Plate current

    3.4 mA

    TVVerticalDeflection

Capacitance

  • Grid-to-plate capacitance

    4.5 pF

  • Input capacitance

    2.2 pF

  • Output capacitance

    0.3 pF

SECTION 2

Triode

Other

  • Plate voltage

    150 V

    TVVerticalDeflection

  • Grid voltage

    -17.5 V

    TVVerticalDeflection

  • Plate current

    35 mA

    TVVerticalDeflection

Capacitance

  • Grid-to-plate capacitance

    8.5 pF

  • Input capacitance

    5.5 pF

  • Output capacitance

    1 pF

Data set 02

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

    -3 V

    Section1;ClassA

  • Plate current

    2.5 mA

    Section1;ClassA

Characteristic

  • Amplification factor

    70

    Section1

  • Plate resistance

    37000 ohm

    Section1

  • Transconductance

    2700 uS

    Section1

Capacitance

  • Grid-to-plate capacitance

    4 pF

    Section1

SECTION 2

Triode

Other

  • Plate voltage

    150 V

    Section2;ClassA

  • Grid voltage

    -17.5 V

    Section2;ClassA

  • Plate current

    45 mA

    Section2;ClassA

Characteristic

  • Amplification factor

    12

    Section2

  • Plate resistance

    1200 ohm

    Section2

  • Transconductance

    10000 uS

    Section2

Capacitance

  • Grid-to-plate capacitance

    8.5 pF

    Section2

Data set 03

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater Warm-up Time (Average) —

    11 s

    Other;PublishedValue1

  • Heater Warm-up Time (Average) —

    11 s

    Other;PublishedValue2

  • Peak value

    200 V

    Other;PublishedValue1

  • Peak value

    200 V

    Other;PublishedValue2

  • Peak value

    200 V

    Other;PublishedValue3

  • Average value

    100 V

    Other;PublishedValue1

  • Average value

    100 V

    Other;PublishedValue2

  • Average value

    100 V

    Other;PublishedValue3

  • DC Plate Voltage

    330 V

    MaximumRating;PublishedValue1

  • DC Plate Voltage

    275 V

    MaximumRating;PublishedValue2

  • Peak Positive-Pulse Plate Voltage* —

    1500 V

    MaximumRating

  • Peak Negative-Pulse Grid Voltage

    400 V

    MaximumRating;PublishedValue1

  • Peak Negative-Pulse Grid Voltage

    250 V

    MaximumRating;PublishedValue2

  • Peak Cathode Current

    70 mA

    MaximumRating;PublishedValue1

  • Peak Cathode Current

    175 mA

    MaximumRating;PublishedValue2

  • Average Cathode Current

    20 mA

    MaximumRating;PublishedValue1

  • Average Cathode Current

    50 mA

    MaximumRating;PublishedValue2

  • Plate Dissipation

    1 W

    MaximumRating;PublishedValue1

  • Plate Dissipation

    7 W

    MaximumRating;PublishedValue2

  • For grid-resistance-bias or cathode-bias operation

    2.2 megohm

    MaximumCircuitValue;PublishedValue1

  • For grid-resistance-bias or cathode-bias operation

    2.2 megohm

    MaximumCircuitValue;PublishedValue2

  • Maximum Plate Voltage

    330 V

    Section1

  • Maximum Plate Dissipation

    1 W

    Section1

  • Maximum Cathode Current

    70 mA

    Section1

Capacitance

  • Grid to Plate

    4.5 pF

    Capacitance;PublishedValue1

  • Grid to Plate

    8.5 pF

    Capacitance;PublishedValue2

  • Grid to Cathode and Heater

    2.2 pF

    Capacitance;PublishedValue1

  • Grid to Cathode and Heater

    5.5 pF

    Capacitance;PublishedValue2

  • Plate to Cathode and Heater

    0.34 pF

    Capacitance;PublishedValue1

  • Plate to Cathode and Heater

    1 pF

    Capacitance;PublishedValue2

Characteristic

  • Plate Voltage

    250 V

    Characteristic;PublishedValue1

  • Plate Voltage

    150 V

    Characteristic;PublishedValue2

  • Grid Voltage

    -3 V

    Characteristic;PublishedValue1

  • Grid Voltage

    -17.5 V

    Characteristic;PublishedValue2

  • Plate Resistance (Approx.)

    40000 ohm

    Characteristic;PublishedValue1

  • Plate Resistance (Approx.)

    925 ohm

    Characteristic;PublishedValue2

  • Transconductance

    1600 uS

    Characteristic;PublishedValue1

  • Transconductance

    6500 uS

    Characteristic;PublishedValue2

  • Plate Current

    1.4 mA

    Characteristic;PublishedValue1

  • Plate Current

    35 mA

    Characteristic;PublishedValue2

  • Plate Current for grid voltage of —

    24 V

    Characteristic

  • Grid Voltage (Approx.) for plate current of

    10 uA

    Characteristic

  • Grid Voltage (Approx.) for plate current of

    50 uA

    Characteristic;PublishedValue1

  • Grid Voltage (Approx.) for plate current of

    44 uA

    Characteristic;PublishedValue2

  • PLATE

    92 V

    Characteristic;PublishedValue1

  • PLATE

    99 V

    Characteristic;PublishedValue2

  • PLATE

    92 V

    Characteristic;PublishedValue3

  • PLATE

    99 V

    Characteristic;PublishedValue4

  • Plate Resistance

    40000 ohm

    Section1

  • Transconductance

    1600 uS

    Section1

  • Amplification Factor

    68

    Section1

SECTION 2

Triode

Other

  • Maximum Plate Voltage

    275 V

    Section2

  • Maximum Plate Dissipation

    7 W

    Section2

  • Maximum Cathode Current

    175 mA

    Section2

Characteristic

  • Plate Resistance

    925 ohm

    Section2

  • Transconductance

    6500 uS

    Section2

  • Amplification Factor

    6

    Section2