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Voltage Triode Pentode ·Pentode-Triode

10KR8

Television triode-pentode combining a general-purpose triode amplifier with a video-amplifier pentode.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9DX
Socket code
B9A
Base pins
9
Nominal heater
10.5 V / 450 mA

Description

Miniature type used in television receiver applications. The triode unit is used as a general-purpose amplifier; the pentode unit is used as a video amplifier. Outlines section, 6E; requires miniature 9-contact socket. Type 10KR8 is identical with type 6KR8 except for heater 9DX ratings. 6KR8 10KR8

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
9DX
Socket code
B9A
Base pins
9
Nominal heater voltage
10.5 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9DX - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN12KBK — Cathode

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN22G1BG1 — Control Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN32PBP — Plate (Anode)

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN4H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN5H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN61G3AG3 — Suppressor GridGroup 9DX6

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN6ISAIS — Internal ScreenGroup 9DX6

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN61KAK — CathodeGroup 9DX6

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN71G1AG1 — Control Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN81G2AG2 — Screen Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN91PAP — Plate (Anode)

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

Section ratings

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
60000 Ω
Transconductance
0.02 S
Amplification factor
68
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
5 W
Max screen dissipation
1.1 W

Source is a product-information/reference sheet and does not print the referenced base tube's section ratings/characteristics; promoted fields intentionally not inferred from an external datasheet.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
4400 Ω
Transconductance
0.0104 S
Amplification factor
46
Max plate voltage
330 V
Max plate dissipation
2 W

Source is a product-information/reference sheet and does not print the referenced base tube's section ratings/characteristics; promoted fields intentionally not inferred from an external datasheet.

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 2

Triode

Characteristic

  • Heater Voltage (ac/dc)

    10.5 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

  • Grid-No

    2

    Published value from supplied target entry

  • Grid-No

    300

    Published value from supplied target entry

  • Grid-No

    0 volts

    Published value from supplied target entry

  • Plate Dissipation

    5 watts

    Published value from supplied target entry

  • For voltages up to

    165 volts

    Published value from supplied target entry

  • For voltages between

    330 volts

    Published value from supplied target entry

  • Plate Supply Voltage

    200 volts

    Published value from supplied target entry

  • Grid-No

    100 volts

    Published value from supplied target entry

  • Transconductance

    20000

    Published value from supplied target entry

  • Plate Current

    19.5 mA

    Published value from supplied target entry

  • Grid-No

    3 mA

    Published value from supplied target entry

  • Heater Voltage (ac/dc)

    6.3 volts

    Published value from supplied target entry

  • Heater Current

    0.3 ampere

    Published value from supplied target entry

  • Plate Voltage

    330 volts

    Published value from supplied target entry

  • Grid-No

    330 volts

    Published value from supplied target entry

  • Grid-No.l (Control-Grid) Voltage

    0 volts

    Published value from supplied target entry

  • Plate Dissipation

    3.1 watts

    Published value from supplied target entry

  • For grid-No

    0.6 volts

    Published value from supplied target entry

  • For grid-No

    300 volts

    Published value from supplied target entry

Capacitance

  • Plate to Cathode, Heater, Grid No

    3

    Published value from supplied target entry