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Voltage Pentode or Tetrode (with diode) ·Diode-Tetrode

6FA7

Diode and twin-plate tetrode designed specifically for frequency-divider and complex-wave-generator circuits, combining switching or waveform generation with an integrated rectifying/control diode.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 300 mA

Description

Diode and twin-plate tetrode for frequency-divider and complex-wave generator circuits. The supplied RCA datasheet was reviewed for heater data, maximum ratings, characteristics, typical operating conditions, capacitances, and application-specific electrical information.

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

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

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

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

Section 2

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
90000 Ω
Transconductance
0.0032 S
Max plate voltage
330 V
Max screen voltage
330 V

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

Diode

Characteristics

  • 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

    10 V

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

  • Current at 6.3 volts — published value 1

    6.3 V

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

  • Current at 6.3 volts — published value 2

    0.3 V

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

  • Grid No.i to plate A

    0.04

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

  • shield, grid No. 2, and heater — published value 1

    2

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

  • shield, grid No. 2, and heater — published value 2

    5.5

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

  • shield, grid No.2, and heater

    1.8

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

  • Plate Voltage

    100 V

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

  • Grid-No.2 Voltage

    100 V

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

  • Grid-No.1 Supply Voltage

    0 V

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

  • Grid-No.1 Resistor (Bypassed)

    2.2 Mohm

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

  • Plate Resistance (Approx )

    90000 ohm

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

  • Transconductance

    3200

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

  • Plate Current

    3.8 mA

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

  • Grid-No.2 Current

    1.7 mA

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

  • plate µa = 20 — published value 1

    20 V

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

  • plate µa = 20 — published value 2

    -4 V

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

  • A/1~ Grid-No.l Supply Voltage — published value 1

    1 V

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

  • A/1~ Grid-No.l Supply Voltage — published value 2

    0 V

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

  • F"' ~ Grid-No.1 Resistor (Bypassed)

    2.2 Mohm

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

  • Plate Resistance (Approx )

    130000 ohm

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

  • Transconductance

    1900

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

  • Plate Current

    2.2 mA

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

  • Grid-No.2 Current

    3 mA

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

  • Pin 3-Diode Plate

    3

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

  • Pin 5 -Heater

    5

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

  • between 165 and 330 volts .See Grid-No.a Input Rating Chart — published value 1

    165 V

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

  • between 165 and 330 volts .See Grid-No.a Input Rating Chart — published value 2

    330 V

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

  • Plate Current for plate volts = 10 — published value 1

    10 V

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

  • Plate Current for plate volts = 10 — published value 2

    2 V

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

  • GRID—NQ2 VOLTS=100

    100 V

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

Other

  • Grid No.1 to plate B

    0.03 mA

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

  • PLATE A VOLTAGE

    330 V

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

  • PLATE B VOLTAGE

    33 V

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

  • SUPPLY VOLTAGE

    330 V

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

  • Negative-bias value

    50 V

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

  • Positive-bias value

    0 V

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

  • PLATE A DISSIPATION — published value 1

    1 mA

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

  • PLATE A DISSIPATION — published value 2

    5 mA

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

  • PLATE 6 DISSIPATION — published value 1

    6 mA

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

  • PLATE 6 DISSIPATION — published value 2

    1 mA

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

  • PLATE 6 DISSIPATION — published value 3

    5 mA

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

  • Heater negative with respect to cathode

    200 V

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

  • Heater positive with respect to cathode

    200 V

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

  • For grid-No.l-resistor-bias operation

    2.2 mA

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

  • PLATE CURRENT

    1 mA

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

SECTION 2

Tetrode

Other

  • Plate voltage

    100 V

    ClassA

  • Plate current

    3.8 mA

    ClassA

  • Maximum plate voltage

    330 V

  • Maximum screen-grid voltage

    330 V

  • Tetrode plate A to diode plate

    0.02 mA

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

Characteristics

  • Plate resistance

    90000 ohm

    ClassA

  • Transconductance

    3200 uS

    ClassA

  • Tetrode grid No.l to diode plate

    0.022

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

  • Tetrode plate B to diode plate — published value 1

    0

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

  • Tetrode plate B to diode plate — published value 2

    55

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

  • Pin 1-Tetrode — published value 1

    1

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

  • Pin 1-Tetrode — published value 2

    6

    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

    8

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