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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6AU6WB

High-reliability rugged 6AU6-family RF pentode designed for shock, vibration, and repeated heater cycling.

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

Description

High-reliability 6AU6-family fixed-slope pentode for RF amplification, designed for shock and vibration resistance and repeated heater cycling.

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
300 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
1000000 Ω
Transconductance
0.0052 S
Max plate voltage
330 V
Max screen voltage
165 V
Max plate dissipation
3.3 W
Max screen dissipation
0.7 W
Max cathode current
20 mA

Published ratings/characteristics promoted from source tables.

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

Pentode

Other

  • Heater voltage

    6.3 V

  • Heater current

    300 mA

  • Heater-cathode voltage

    100 V

Capacitance

  • Grid 1 to plate maximum

    0.0035 pF

Data set 02

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Plate resistance

    100000 ohm

    PromotedValue

  • Transconductance

    0.0052 A/V

    PromotedValue

  • AVERAGE CHARACTERISTICS — published value 1

    6.3 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • AVERAGE CHARACTERISTICS — published value 2

    300 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • LIMITS OF APPLIED VOLTAGE- AC OR DC — published value 1

    6.3

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • LIMITS OF APPLIED VOLTAGE- AC OR DC — published value 2

    0.6

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • HEATER POSITIVE WITH RESPECT TO CATHODE

    100 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • HEATER NEGATIVE WITH RESPECT TO CATHODE

    100 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • PLATE VOLTAGE -DC

    330 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 2 VOLTAGE

    2

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • PLATE DISSIPATION

    3.1 WATTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 2 DISSIPATION — published value 1

    2 WATT

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 2 DISSIPATION — published value 2

    0.7 WATT

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 3 VOLTAGE — published value 1

    3 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 3 VOLTAGE — published value 2

    0 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 1 VOLTAGE

    1

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • POSITIVE VALUE

    0 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 1 CURRENT — published value 1

    1 mA

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 1 CURRENT — published value 2

    1 mA

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • ENVELOPE TEMPERATURE

    165

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 1 CIRCUIT RESISTANCE — published value 1

    0.5

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 1 CIRCUIT RESISTANCE — published value 2

    15

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • PLATE VOLTAGE

    250 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 2 VOLTAGE — published value 1

    2 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 2 VOLTAGE — published value 2

    150 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 3 VOLTAGE -CONNECTED TO NEGATIVE END OF CATHODE RESISTOR — published value 1

    3 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 3 VOLTAGE -CONNECTED TO NEGATIVE END OF CATHODE RESISTOR — published value 2

    0 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • CATHODE RESISTOR

    68 OHMS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • PLATE CURRENT

    10.6 mA

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 2 CURRENT — published value 1

    2 mA

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 2 CURRENT — published value 2

    4.3 mA

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • TRANSCONDUCTANCE — published value 1

    5.2

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • TRANSCONDUCTANCE — published value 2

    1

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • PLATE RESISTANCE

    1

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

Other

  • Maximum plate voltage

    300 V

    PromotedValue

  • Maximum screen voltage

    150 V

    PromotedValue

  • Maximum plate dissipation

    3.5 W

    PromotedValue

  • Maximum screen dissipation

    0.6 W

    PromotedValue

  • Maximum cathode current

    20 mA

    PromotedValue

  • GRID 1 VOLTAGE FOR 1y=35 E[A MAX. — published value 1

    35 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • GRID 1 VOLTAGE FOR 1y=35 E[A MAX. — published value 2

    -9 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

Data set 03

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage ……s …… VÊ

    6.3 V

  • Intensité filament. vesssc 00 f

    300 mA

  • onsous oucaconses cossercoum en coss ns …… VÊ

    6.9 V

  • cucs ersameenente es secèe se va

    330 V

  • Tension de grille n°3 ……uueressarenceeninncceseannencreseense« … VE;

    0 V

  • Tension de grill® n° 2 ...c serscccncensencanverense soeuseuree comsen vacv s Vgz

    165 V

  • Tension négative de grille n°Î ..………vssrerererencrnteress casssaronsen monoer -“Vg;

    50 V

  • Plate dissipation …… … Pa

    3.1 W

  • cuc en se Pg2

    0.7 W

  • c00e Ig,

    1 mA

  • Tension entre filament et CathodE ... rveeeennnnnnnnne Vfk

    100 V

  • Résistance du circuit de grille ne1 … … Rg:

    0.5 MΩ

  • Altitude maximale sans pressuriSation ……s

    18 km

  • Tension d'ANOËE _.……esssoserecessarensecrseseramesereeces 100 250

    250 V

  • Tension de grill® n°2 ......….…s cousonsanens vans soanse c00000 100 125

    150 V

  • sorses sonsen vemesssemessause s00000 5,0 7,6

    10.6 mA

  • Courant de grille n°2 ……esmensens sorasacernse vovvce 2,1 3,0

    4.3 mA

  • PEnt@E…………sersres sorrencrenercane 3,9 4,5

    5.2 mA/V

  • Vs =

    2 Veff

  • Rg:

    100 kΩ

  • Ra 100 240

    510 kΩ

  • Ra 100 240

    510 kΩ

  • Rk 1,7

    1.8 kΩ

  • R'g 240

    510 kΩ

  • vs 25

    31 veff

  • Rg1

    100 kΩ

  • Ra 100 240

    510 kΩ

  • Rg2 200 600 700 1 100

    1300 kΩ

  • R'& 100 240| 510 510

    1000 kΩ

  • vs 47 44 53 38

    44 Veff

  • scssveresace en semenscosesc cn cerencieccess V@

    250 V

  • Résistance d@ CALROQE …. cros sraverseressrveeraneraevscecse smeesereresrereeurs RE

    330 Ω

Characteristic

  • Capacitance grille n° 1/ An0d@ ….……srmsesss CB1/ &

    3.5 pF

    InterelectrodeCapacitance

  • Capacitance d'entrée … ……s … Ce

    6 pF

    InterelectrodeCapacitance

  • Capacitance de SOrtiE ……ssesesesssansenensnsennsce CS

    4.9 pF

    InterelectrodeCapacitance