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Power - TV Vertical Output ·Triode-Triode

6FD7

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
9HF
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 925 mA

Description

Dissimilar dual triode used as a combined vertical-deflection oscillator and vertical-deflection amplifier in television receivers.

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

9HF - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1Base PinBP — Plate (Anode)

Literal label 2P; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9HF

PIN2Base PinBG1 — Control Grid

Literal label 2G1; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9HF

PIN3Base PinBG3 — Suppressor Grid

Literal label 2G3; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9HF

PIN4Base Pin—H — Heater

Literal label H; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9HF

PIN5Base Pin—H — Heater

Literal label H; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9HF

PIN6Base PinAP — Plate (Anode)

Literal label 1P; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9HF

PIN7Base PinAG1 — Control Grid

Literal label 1G1; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9HF

PIN8Base PinAK — Cathode

Literal label 1K; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9HF

PIN9Base PinBK — Cathode

Literal label 2K; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9HF

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
40000 Ω
Transconductance
0.0016 S
Amplification factor
64
Max plate voltage
330 V
Max plate dissipation
1.5 W
Max cathode current
20 mA

Published values promoted where clearly attributable to this section.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
800 Ω
Transconductance
0.0075 S
Amplification factor
6
Max plate voltage
330 V
Max plate dissipation
10 W
Max cathode current
50 mA

Published maximum ratings and characteristic values promoted where applicable; additional values retained in TUBE_SECTION_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

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    250 V

    ClassA

  • Plate current

    1.4 mA

    ClassA

  • Maximum plate voltage

    330 V

  • respect to cathode

    200 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • respect to cathode

    200 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • DC PLATE VOLTAGE

    330 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PEAK NEGATIVE-PULSE GRID VOLTAGE

    400 V

    Pulse

  • PLATE DISSIPATION

    1.5 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • bias operation

    2.2 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • DC PLATE VOLTAGE

    330 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PEAK POSITIVE-PULSE PLATE VOLTAGEe

    1500 V

    Pulse

  • PEAK NEGATIVE-PULSE GRID VOLTAGE

    250 V

    Pulse

  • PLATE DISSIPATION

    10 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Characteristics

  • Plate resistance

    40000 ohm

    ClassA

  • Transconductance

    1600 uS

    ClassA

  • Amplification factor

    64

    ClassA

  • Voltage (AC or DC) — published value 1

    6.3 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Voltage (AC or DC) — published value 2

    0.6 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Current at heater volts = 6 3 — published value 1

    6 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Current at heater volts = 6 3 — published value 2

    3 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Current at heater volts = 6 3 — published value 3

    0.925 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid to plate — published value 1

    4.5

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid to plate — published value 2

    10

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid to cathode and heater — published value 1

    2.2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid to cathode and heater — published value 2

    6.5

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate to cathode and heater — published value 1

    0.4

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate to cathode and heater — published value 2

    1.2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Voltage — published value 1

    250 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Voltage — published value 2

    60 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Voltage — published value 3

    150 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid Voltage — published value 1

    -3 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid Voltage — published value 2

    0 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid Voltage — published value 3

    -17.5 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Resistance (Approx.) — published value 1

    40000 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Resistance (Approx.) — published value 2

    800 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Transconductance — published value 1

    1600

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Transconductance — published value 2

    7500

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Current — published value 1

    1.4 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Current — published value 2

    950 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Current — published value 3

    40 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 1 -Plate of — published value 1

    1

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 1 -Plate of — published value 2

    6

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 2 -Grid of — published value 1

    2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 2 -Grid of — published value 2

    7

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 3-Grid of — published value 1

    3

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 3-Grid of — published value 2

    8

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 4 -Heater — published value 1

    4

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 4 -Heater — published value 2

    9

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

SECTION 2

Triode

Other

  • Plate voltage

    150 V

    ClassA

  • Plate current

    40 mA

    ClassA

  • Maximum plate voltage

    330 V

Characteristics

  • Plate resistance

    800 ohm

    ClassA

  • Transconductance

    7500 uS

    ClassA

  • Amplification factor

    6

    ClassA

  • Pin 5 -Heater

    5

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater Voltage (ae/dc) 6.3

    13 V

    Published in approved 6FD7 target entry; Section1

  • Heater Current 0.925

    450 mA

    Published in approved 6FD7 target entry; Section1

  • Heater Warm-up Time (Average)

    11 seconds

    Published in approved 6FD7 target entry; Section1

  • Transconductance, For plate current of

    1 mA

    Published in approved 6FD7 target entry; Section1

  • Plate Current, For grid voltage of

    25 V

    Published in approved 6FD7 target entry; Section1

  • Plate Current, For grid voltage of 25 volts

    6 mA

    Published in approved 6FD7 target entry; Section1

  • DC Plate Voltage 330

    330 V

    Published in approved 6FD7 target entry; Section1

  • 400

    250 V

    Published in approved 6FD7 target entry; Section1

  • Peak Cathode Current 70

    175 mA

    Published in approved 6FD7 target entry; Section1

  • Average Cathode Current 20

    50 mA

    Published in approved 6FD7 target entry; Section1

  • Plate Dissipation 1.5

    10 W

    Published in approved 6FD7 target entry; Section1

  • For grid-resistor-bias or cathode-bias operation 2.2

    2.2 MΩ

    Published in approved 6FD7 target entry; Section1

Capacitance

  • Grid to Plate 4.5

    10 pF

    Published in approved 6FD7 target entry; Section1

  • Grid to Cathode and Heater 2.2

    6.5 pF

    Published in approved 6FD7 target entry; Section1

  • Plate lo Cathode and Heater 0.4

    0.2 pF

    Published in approved 6FD7 target entry; Section1

Characteristic

  • Plate Voltage 250 60

    150 V

    Published in approved 6FD7 target entry; Section1

  • Grid Voltage —3 0

    -17.5 V

    Published in approved 6FD7 target entry; Section1

  • Plate Resistance (Approx.) 40000

    800 Ω

    Published in approved 6FD7 target entry; Section1

  • Transconductance 1600

    7500 µS

    Published in approved 6FD7 target entry; Section1

  • Plate Current 1.5 95

    40 mA

    Published in approved 6FD7 target entry; Section1

SECTION 2

Triode

Other

  • Heater Voltage (ae/dc) 6.3

    13 V

    Published in approved 6FD7 target entry; Section2

  • Heater Current 0.925

    450 mA

    Published in approved 6FD7 target entry; Section2

  • Heater Warm-up Time (Average)

    11 seconds

    Published in approved 6FD7 target entry; Section2

  • Transconductance, For plate current of

    1 mA

    Published in approved 6FD7 target entry; Section2

  • Plate Current, For grid voltage of

    25 V

    Published in approved 6FD7 target entry; Section2

  • Plate Current, For grid voltage of 25 volts

    6 mA

    Published in approved 6FD7 target entry; Section2

  • DC Plate Voltage 330

    330 V

    Published in approved 6FD7 target entry; Section2

  • 400

    250 V

    Published in approved 6FD7 target entry; Section2

  • Peak Cathode Current 70

    175 mA

    Published in approved 6FD7 target entry; Section2

  • Average Cathode Current 20

    50 mA

    Published in approved 6FD7 target entry; Section2

  • Plate Dissipation 1.5

    10 W

    Published in approved 6FD7 target entry; Section2

  • For grid-resistor-bias or cathode-bias operation 2.2

    2.2 MΩ

    Published in approved 6FD7 target entry; Section2

Capacitance

  • Grid to Plate 4.5

    10 pF

    Published in approved 6FD7 target entry; Section2

  • Grid to Cathode and Heater 2.2

    6.5 pF

    Published in approved 6FD7 target entry; Section2

  • Plate lo Cathode and Heater 0.4

    0.2 pF

    Published in approved 6FD7 target entry; Section2

Characteristic

  • Plate Voltage 250 60

    150 V

    Published in approved 6FD7 target entry; Section2

  • Grid Voltage —3 0

    -17.5 V

    Published in approved 6FD7 target entry; Section2

  • Plate Resistance (Approx.) 40000

    800 Ω

    Published in approved 6FD7 target entry; Section2

  • Transconductance 1600

    7500 µS

    Published in approved 6FD7 target entry; Section2

  • Plate Current 1.5 95

    40 mA

    Published in approved 6FD7 target entry; Section2