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Power - Pentode (NOT beam) ·Pentode

9KX6

Frame-grid sharp-cutoff pentode specifically for high-current video-output amplification in color and monochrome televisions.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9GK
Socket code
B9A
Base pins
9
Nominal heater
8.7 V / 450 mA

Description

Frame-grid sharp-cutoff pentode for video-output amplification in color and black-and-white 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
9GK
Socket code
B9A
Base pins
9
Nominal heater voltage
8.7 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9GK - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1Base Pin—K — Cathode

Literal label K; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9GK

PIN2Base Pin—G1 — Control Grid

Literal label G1; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9GK

PIN3Base Pin—G3 — Suppressor GridGroup 9GK3

Literal label G3; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9GK

PIN3Base Pin—IS — Internal ScreenGroup 9GK3

Literal label IS; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9GK

PIN4Base Pin—H — Heater

Literal label H; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9GK

PIN5Base Pin—H — Heater

Literal label H; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9GK

PIN6Base Pin—P — Plate (Anode)

Literal label P; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9GK

PIN7Base Pin—G2 — Screen Grid

Literal label G2; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9GK

PIN8Base Pin—G3 — Suppressor GridGroup 9GK8

Literal label G3; manufacturer confirmation pending

Unverified

EIA Base Connections printed p132, 9GK

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
50000 Ω
Transconductance
0.036 S
Max plate voltage
400 V
Max screen voltage
330 V
Max plate dissipation
11.5 W
Max screen dissipation
1.5 W

Published ratings and characteristics extracted from the approved RCA source. Pulse-only ratings remain parameter rows unless explicitly continuous.

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

  • socket. Heater:

    8.7 V

    Other;PublishedValue1

  • socket. Heater:

    0.45 V

    Other;PublishedValue2

  • time

    11 s

    Other;PublishedValue1

  • time

    200 s

    Other;PublishedValue2

  • Plate Voltage

    400 V

    MaximumRating

  • Grid-No

    3 V

    MaximumRating;PublishedValue1

  • Grid-No

    0 V

    MaximumRating;PublishedValue2

  • Grid-No

    2 V

    MaximumRating;PublishedValue1

  • Grid-No

    330 V

    MaximumRating;PublishedValue2

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

    0 V

    MaximumRating

  • Plate Dissipation

    11.5 W

    MaximumRating

  • Grid-No

    2 W

    MaximumRating;PublishedValue1

  • Grid-No

    1.5 W

    MaximumRating;PublishedValue2

  • Maximum Plate Voltage

    400 V

    Section1

  • Maximum Screen Voltage

    330 V

    Section1

  • Maximum Plate Dissipation

    11.5 W

    Section1

  • Maximum Screen Dissipation

    1.5 W

    Section1

Characteristic

  • Plate Voltage

    250 V

    Characteristic;PublishedValue1

  • Plate Voltage

    50 V

    Characteristic;PublishedValue2

  • Grid-No

    2 V

    Characteristic;PublishedValue1

  • Grid-No

    150 V

    Characteristic;PublishedValue2

  • Grid-No

    125 V

    Characteristic;PublishedValue3

  • Grid-No.l Voltage

    0 V

    Characteristic;PublishedValue1

  • Grid-No.l Voltage

    0 V

    Characteristic;PublishedValue2

  • Cathode-Bias Resistor, Bypassed

    56 ohm

    Characteristic

  • Plate Resistance (Approx.)

    50000 ohm

    Characteristic

  • Plate Current

    28 mA

    Characteristic;PublishedValue1

  • Plate Current

    70 mA

    Characteristic;PublishedValue2

  • Grid-No.l Voltage (Approx.) for plate current

    100 V

    Characteristic;PublishedValue1

  • Grid-No.l Voltage (Approx.) for plate current

    -5.7 V

    Characteristic;PublishedValue2

  • Plate Resistance

    50000 ohm

    Section1

  • Transconductance

    36000 uS

    Section1