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Voltage Pentode - Sharp Cutoff (single) ·Pentode

3JC6A

Sharp-cutoff pentode designed for television IF, picture-IF, video, or VHF tuner amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9PM
Socket code
B9A
Base pins
9
Nominal heater
3.5 V / 600 mA

Description

Sharp-cutoff frame-grid miniature pentode used in television IF-amplifier stages around 40 MHz.

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
9PM
Socket code
B9A
Base pins
9
Nominal heater voltage
3.5 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9PM - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
180000 Ω
Transconductance
0.016 S
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
3.1 W
Max screen dissipation
0.7 W

6JC6A-equivalent column used for the A-version ratings and characteristics.

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

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • 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

  • Plate Voltage

    330 V

    MaximumRating;PublishedValue1

  • Plate Voltage

    330 V

    MaximumRating;PublishedValue2

  • Grid-No.3 (Suppressor-Grid) Voltage, Positive value

    0 V

    MaximumRating;PublishedValue1

  • Grid-No.3 (Suppressor-Grid) Voltage, Positive value

    0 V

    MaximumRating;PublishedValue2

  • Grid-No.2 (Screen-Grid) Supply Voltage

    330 V

    MaximumRating;PublishedValue1

  • Grid-No.2 (Screen-Grid) Supply Voltage

    330 V

    MaximumRating;PublishedValue2

  • Grid-No.l (Control-Grid) Voltage, Positive-bias value

    0 V

    MaximumRating;PublishedValue1

  • Grid-No.l (Control-Grid) Voltage, Positive-bias value

    0 V

    MaximumRating;PublishedValue2

  • Plate Dissipation

    2.5 W

    MaximumRating;PublishedValue1

  • Plate Dissipation

    3.1 W

    MaximumRating;PublishedValue2

  • For grid-No.2 voltages up to 165 volts

    0.6 V

    MaximumRating;PublishedValue1

  • For grid-No.2 voltages up to 165 volts

    0.7 V

    MaximumRating;PublishedValue2

  • For fixed-bias operation

    0.25 megohm

    MaximumCircuitValue;PublishedValue1

  • For fixed-bias operation

    0.25 megohm

    MaximumCircuitValue;PublishedValue2

  • For cathode-bias operation

    1 megohm

    MaximumCircuitValue;PublishedValue1

  • For cathode-bias operation

    1 megohm

    MaximumCircuitValue;PublishedValue2

  • PLATE VOLTS

    48 V

    MaximumCircuitValue

Capacitance

  • Grid No.l to Plate

    0.019 pF

    Capacitance

Characteristic

  • Plate Supply Voltage

    125 V

    Characteristic;PublishedValue1

  • Plate Supply Voltage

    125 V

    Characteristic;PublishedValue2

  • Grid-No.2 Supply Voltage

    125 V

    Characteristic;PublishedValue1

  • Grid-No.2 Supply Voltage

    125 V

    Characteristic;PublishedValue2

  • Cathode-Bias Resistor

    56 ohm

    Characteristic;PublishedValue1

  • Cathode-Bias Resistor

    56 ohm

    Characteristic;PublishedValue2

  • Plate Resistance (Approx.)

    0.18 megohm

    Characteristic;PublishedValue1

  • Plate Resistance (Approx.)

    0.18 megohm

    Characteristic;PublishedValue2

  • Plate Current

    13 mA

    Characteristic;PublishedValue1

  • Plate Current

    14 mA

    Characteristic;PublishedValue2

  • Grid-No.2 Current

    3.2 mA

    Characteristic;PublishedValue1

  • Grid-No.2 Current

    3.4 mA

    Characteristic;PublishedValue2

  • 100

    -3 V

    Characteristic;PublishedValue1

  • 100

    -3 V

    Characteristic;PublishedValue2