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Hexode ·Hexode

12BN6

Gated-beam hexode designed as a combined limiter, discriminator, and audio-voltage amplifier in intercarrier television and FM receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7DF
Socket code
B7G
Base pins
7
Nominal heater
12.6 V / 300 mA

Description

Miniature type used as combined limiter, discriminator, and audio-voltage amplifier in intercarrier television and FM receivers. Outlines section, 5D; requires mini- ature 7-contact socket. Types 3BN6 and 4BN6 are iden- tical with type 6BN6/6KS6 except for heater ratings. 7DF 3BN6 4BN6 6BN6/6KS6 12BN6

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7DF
Socket code
B7G
Base pins
7
Nominal heater voltage
12.6 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7DF - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1ISAIS — Internal ScreenGroup 7DF1

Source-transcribed; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 129, 7DF

PIN1KAK — CathodeGroup 7DF1

Source-transcribed; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 129, 7DF

PIN2G1AG1 — Control Grid

Source-transcribed; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 129, 7DF

PIN3H—H — Heater

Source-transcribed; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 129, 7DF

PIN4H—H — Heater

Source-transcribed; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 129, 7DF

PIN5G2AG2 — Screen Grid

Source-transcribed; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 129, 7DF

PIN6G3AG3 — Suppressor Grid

Source-transcribed; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 129, 7DF

PIN7PAP — Plate (Anode)

Source-transcribed; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 129, 7DF

Section ratings

1 physical section, each with unique specifications.

Section 1

Hexode

X-ray radiationInterelectrode capacitances
Plate resistance
500000 Ω
Transconductance
0.0022 S
Max plate voltage
300 V
Max screen voltage
150 V
Max plate dissipation
2 W
Max cathode current
11.5 mA

Gated-beam discriminator; no non-heater electrical values copied from external 6BN6 sheet.

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

Hexode

Other

  • Heater voltage

    12.6 V

    Nominal

  • Heater current

    150 mA

    Nominal

  • Plate voltage

    63122121 V

    Typical operating conditions

Data set 02

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Hexode

Characteristic

  • Heater Voltage

    12.6 V

  • Heater Current

    150 mA

  • Grid1 To All Capacitance

    4.2 pF

  • Grid2 To All Capacitance

    3.3 pF

  • Grid1ToGrid3CapacitanceMaximum

    0.004 pF

Other

  • Plate Supply Voltage Maximum

    300 V

  • AcceleratorVoltageMaximum

    100 V

  • PeakPositiveLimiterGridVoltageMaximum

    55 V

  • Total Cathode Current Maximum

    11.5 mA

  • Plate Supply Voltage

    285 V

  • Plate Voltage

    122 V

  • AcceleratorVoltage

    100 V

  • Cathode Bias Resistance

    200 to 400 ohm

  • Plate Load Resistance

    330000 ohm

  • MinimumSignalVoltageForLimiting

    1.25 V

  • AverageDCPlateCurrent

    0.44 mA

  • AcceleratorCurrent

    10 mA

  • InputSignalForAMRejectionAdjustment

    2 V

  • AMRejection

    30 dB

    InputSignal=3Vrms

  • Total Harmonic Distortion

    1.8 %

  • PeakAudioOutputVoltage

    16.8 V

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Hexode

Capacitance

  • GRID k1 TO ALL

    4.2 pF

    Published datasheet

  • GRID k3 TO ALL

    3.3 pF

    Published datasheet

Other

  • TOTAL DC AND PEAK

    2 V

    Published datasheet

  • INPUT—SIGNAL CENTER FREQUENCY

    10.7 MHz

    Published datasheet; operating column 1

  • INPUT—SIGNAL CENTER FREQUENCY

    4.5 MHz

    Published datasheet; operating column 2

  • CATHODE —BIAS RESISTOR

    200 ohm

    Published datasheet; operating column 1

  • CATHODE —BIAS RESISTOR

    400 ohm

    Published datasheet; operating column 2

  • PLATE LOAD RESISTOR

    85000 ohm

    Published datasheet; operating column 1

  • PLATE LOAD RESISTOR

    330000 ohm

    Published datasheet; operating column 2

  • PLATE LINEARITY RESISTOR

    470 ohm

    Published datasheet; operating column 1

  • PLATE LINEARITY RESISTOR

    1500 ohm

    Published datasheet; operating column 2

  • PLATE LINEARITY RESISTOR

    0 ohm

    Published datasheet; operating column 3

  • LIMITING ACTION, RMS B

    1.25 V

    Published datasheet; operating column 1

  • AM REJECTION ADJUSTMENT A

    1.25 V

    Published datasheet; operating column 1

  • AM REJECTION ADJUSTMENT A

    2 V

    Published datasheet; operating column 2

  • AM REJECTION ADJUSTMENT A

    0 V

    Published datasheet; operating column 3

  • Ef =

    12.6 V

    Published datasheet

  • Eb =

    60 V

    Published datasheet

  • Eacc =

    60 V

    Published datasheet

  • Maximum plate voltage

    330 V

    Published datasheet; promoted section value

  • Maximum screen voltage

    110 V

    Published datasheet; promoted section value

  • Maximum cathode current

    13 mA

    Published datasheet; promoted section value

Characteristic

  • PLATE SUPPLY VOLTAGE

    33 V

    Published datasheet

  • GRID VOLTAGE

    110 V

    Published datasheet

  • PEAK POSITIVE LIMITER — GRID VOLTAGE

    60 V

    Published datasheet

  • DC CATHODE CURRENT

    13 mA

    Published datasheet

  • PLATE —SUPPLY VOLTAGE

    85 V

    Published datasheet; operating column 1

  • PLATE —SUPPLY VOLTAGE

    285 V

    Published datasheet; operating column 2

  • PLATE —SUPPLY VOLTAGE

    2 V

    Published datasheet; operating column 3

  • PLATE VOLTAGE

    63 V

    Published datasheet; operating column 1

  • PLATE VOLTAGE

    122 V

    Published datasheet; operating column 2

  • PLATE VOLTAGE

    121 V

    Published datasheet; operating column 3

  • ACCELERATOR VOLTAGE

    55 V

    Published datasheet

  • DC PLATE CURRENT

    0.25 mA

    Published datasheet; operating column 1

  • DC PLATE CURRENT

    0.49 mA

    Published datasheet; operating column 2

  • DC PLATE CURRENT

    0.44 mA

    Published datasheet; operating column 3

  • ACCELERATOR CURRENT

    4.1 mA

    Published datasheet; operating column 1

  • ACCELERATOR CURRENT

    9 mA

    Published datasheet; operating column 2

  • PEAK AUDIO

    0 V

    Published datasheet; operating column 1

  • PEAK AUDIO

    6 V

    Published datasheet; operating column 2

  • PEAK AUDIO

    1 V

    Published datasheet; operating column 3

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Hexode

Characteristic

  • Heater Voltage (ac/dc)

    12.6 volts

    Published value from supplied target entry

  • Heater Current

    0.15 ampere

    Published value from supplied target entry

  • Plate-Supply Voltage

    330 volts

    Published value from supplied target entry

  • Grid-No

    110 volts

    Published value from supplied target entry

  • Grid-No

    60 volts

    Published value from supplied target entry

  • Cathode Current

    13 mA

    Published value from supplied target entry

  • Heater Voltage (ac/dc)

    8.4 volts

    Published value from supplied target entry

  • Heater Current

    0.45 ampere

    Published value from supplied target entry

  • Heater Warm-up Time (Average)

    11 seconds

    Published value from supplied target entry

  • Plate Voltage

    330 volts

    Published value from supplied target entry

  • Plate Voltage

    250

    Published value from supplied target entry

  • Grid Voltage

    -3 volts

    Published value from supplied target entry

  • Plate Resistance (Approx.)

    28000 ohms

    Published value from supplied target entry

  • Plate Current

    1.6 mA

    Published value from supplied target entry

  • Grid Voltage (Approx.) for plate current of

    -5.5 volts

    Published value from supplied target entry

Capacitance

  • Triode Grid to Triode Plate

    2.6 pF

    Published value from supplied target entry

  • Triode Grid to Cathode and Heater

    3.6 pF

    Published value from supplied target entry

  • Triode Plate to Cathode and Heater

    0.26 pF

    Published value from supplied target entry

  • Diode Cathode to All Other Electrodes (Each Diode Unit)

    5 PF

    Published value from supplied target entry

  • Diode Plate to Diode Cathode and Heater (Each Diode Unit)

    1.9 PF

    Published value from supplied target entry

  • Diode Cathode to Diode Plate and Heater (Each Diode Unit)

    4.8 PF

    Published value from supplied target entry

  • Diode Plate to All Other Electrodes (Each Diode Unit)

    3 pF

    Published value from supplied target entry