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Voltage Pentode - Remote Cutoff (single) ·Pentode

6HR6

Semi-remote-cutoff pentode for gain-controlled IF amplifier service, with controlled heater warm-up for coordinated receiver operation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7BK
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 450 mA

Description

Semi-remote-cutoff pentode designed for IF amplifier service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7BK
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7BK - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G1AG1 — Control Grid

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BK

PIN2G3AG3 — Suppressor GridGroup 7BK2

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BK

PIN2ISAIS — Internal ScreenGroup 7BK2

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BK

PIN3H—H — Heater

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BK

PIN4H—H — Heater

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BK

PIN5PAP — Plate (Anode)

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BK

PIN6G2AG2 — Screen Grid

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BK

PIN7KAK — Cathode

EIA chart transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 7BK

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
500000 Ω
Transconductance
0.0085 S
Max plate voltage
330 V
Max screen voltage
330 V

Published maximum ratings and characteristic values promoted where applicable; additional table 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 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    200 V

    ClassA

  • Plate current

    13.2 mA

    ClassA

  • Maximum plate voltage

    330 V

  • Maximum screen-grid voltage

    330 V

  • respect to cathode

    200 V

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

  • respect to cathode

    200 V

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

  • Grid No.l to plate — published value 1

    0 mA

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

  • Grid No.l to plate — published value 2

    6 mA

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

  • PLATE VOLTAGE

    300 V

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

  • GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE

    300 V

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

  • Negative-bias value

    50 V

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

  • Positive-bias value

    0 V

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

  • PLATE DISSIPATION

    3 mA

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

  • For fixed-bias operation — published value 1

    0 mA

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

  • For fixed-bias operation — published value 2

    5 mA

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

  • For cathode-bias operation

    1 mA

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

Characteristics

  • Plate resistance

    500000 ohm

    ClassA

  • Transconductance

    8500 uS

    ClassA

  • Voltage (AC or DCI• — published value 1

    6.38 V

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

  • Voltage (AC or DCI• — published value 2

    6.3 V

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

  • Voltage (AC or DCI• — published value 3

    0.6 V

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

  • Current — published value 1

    450 mA

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

  • Current — published value 2

    30 mA

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

  • Current — published value 3

    450 mA

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

  • Warm-up time (Average)

    11

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

  • and heater

    8.8

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

  • and heater

    5.2

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

  • Plate Supply Voltage

    200 V

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

  • Grid-No.2 Supply Voltage

    115 V

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

  • Grid-No.l Supply Voltage

    0 V

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

  • Cathode Resistor

    68 ohm

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

  • Plate Resistance (Approx )

    0.5 Mohm

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

  • Transconductance

    8500

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

  • Plate Current

    13.2 mA

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

  • Grid-No.2 Current

    4 mA

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

  • transconductance (µmhos) - 60 — published value 1

    60 V

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

  • transconductance (µmhos) - 60 — published value 2

    -15 V

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

  • Pin 1 -Grid No.l — published value 1

    1

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

  • Pin 1 -Grid No.l — published value 2

    4

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

  • Pin 2-Grid No.3, — published value 1

    2

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

  • Pin 2-Grid No.3, — published value 2

    5

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

  • Internal

    6

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

  • Shield

    7

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

  • Pin 3-Heater

    3

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

  • tween 150 and 300 volts .See Grid-No.a Input Rating Chart — published value 1

    150 V

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

  • tween 150 and 300 volts .See Grid-No.a Input Rating Chart — published value 2

    300 V

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

  • b at heater volts = 6.9

    6.9 V

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

  • GRID—Na2 VOLTS=115

    115 V

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

  • PLATE VOLTS=200

    200 V

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

  • GRID-No.2 VOLTS=115

    115 V

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