Data set 01
1958 Brimar Radio Valve No 7
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Heater Voltage
6.3 V
Heater Current
300 mA
Voltage Pentode - Sharp Cutoff (single) ·Pentode
6AU6
Fixed-slope sharp-cutoff pentode for general RF voltage amplification in receiver and electronic equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7BK
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 6.3 V / 300 mA
Description
Indirectly heated fixed-slope pentode for RF voltage amplification.
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.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1G1 | A | G1 — Control Grid EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN2G3 | A | G3 — Suppressor GridGroup 7BK2 EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN2IS | A | IS — 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 |
| PIN5P | A | P — Plate (Anode) EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN6G2 | A | G2 — Screen Grid EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN7K | A | K — 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
- 150 V
- Max plate dissipation
- 3.3 W
- Max screen dissipation
- 0.7 W
- Max cathode current
- 18 mA
Promoted from the printed maximum-rating/characteristic columns; operating points retained as section parameters.
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 02
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
250 V
ClassA
Screen voltage
150 V
ClassA
Plate current
10.6 mA
ClassA
Screen current
4.3 mA
ClassA
Characteristic
Plate resistance
1000000 Ω
ClassA
Transconductance
5200 µS
ClassA
Transconductance
4800 µS
TriodeConnection
Amplification factor
36
TriodeConnection
Data set 03
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
Data set 04
1963 Amperex Condensed
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
250 V
Published table
Screen voltage
150 V
Published table
Control-grid bias
-6.5 V
Published table
Plate current
10.6 mA
Published table
Screen current
4.3 mA
Published table
Triode-connected plate voltage
250 V
TriodeConnection
Triode-connected grid bias
-1 V
TriodeConnection
Triode-connected plate current
13 mA
TriodeConnection
Characteristic
Transconductance
5200 µS
Published table
Amplification factor
36
Published table
Plate resistance
1000000 ohm
Published table
Heater voltage
6.3 V
Published heater rating
Heater current
300 mA
Published heater rating
Triode-connected amplification factor
36
TriodeConnection
Triode-connected transconductance
4800 µS
TriodeConnection
Data set 05
1963 Mullard
Published operating points and test conditions from this source.
SECTION 1
Pentode
Capacitance
Input capacitance
5.5 pF
PentodeConnection
Output capacitance
5 pF
PentodeConnection
Grid-to-plate capacitance maximum
0.003 pF
PentodeConnection
Characteristics
Plate voltage
100 V
PentodeConnection;Point1
Screen-grid voltage
100 V
PentodeConnection;Point1
Plate current
5 mA
PentodeConnection;Point1
Screen-grid current
2.1 mA
PentodeConnection;Point1
Transconductance
3900 uS
PentodeConnection;Point1
Plate resistance
500000 Ohm
PentodeConnection;Point1
Plate voltage
250 V
PentodeConnection;Point2
Screen-grid voltage
125 V
PentodeConnection;Point2
Plate current
7.6 mA
PentodeConnection;Point2
Screen-grid current
3 mA
PentodeConnection;Point2
Transconductance
4500 uS
PentodeConnection;Point2
Plate resistance
1500000 Ohm
PentodeConnection;Point2
Triode-connected transconductance
4800 uS
TriodeConnection;Va=250V
Triode-connected amplification factor
36 ratio
TriodeConnection;Va=250V
Triode-connected plate resistance
7500 Ohm
TriodeConnection;Va=250V
Data set 06
1965 Sylvania Electronic Tubes Vol3
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Plate voltage
250 V
PentodeConnection
Screen-grid voltage
125 V
PentodeConnection
Cathode resistor
100 Ohm
PentodeConnection
Transconductance
4500 uS
PentodeConnection
Plate resistance
1500000 Ohm
PentodeConnection
Plate current
7.6 mA
PentodeConnection
Screen-grid current
3 mA
PentodeConnection
Triode-connected plate voltage
250 V
TriodeConnection
Triode-connected amplification factor
36 ratio
TriodeConnection
Triode-connected plate resistance
7500 Ohm
TriodeConnection
Capacitance
Grid-to-plate capacitance
0.0035 pF
PentodeConnection
Input capacitance
5.5 pF
PentodeConnection
Output capacitance
5 pF
PentodeConnection
Data set 07
1965 Westinghouse Data Book
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
300 mA
Plate Voltage
250 V
Screen Voltage
150 V
Grid Voltage
-2 V
Plate Current
10.5 mA
Screen Current
4.2 mA
Transconductance
5200 uS
Plate Resistance
500000 ohm
GridToPlateCapacitanceMaximum
0.0035 pF
Input Capacitance
5.5 pF
Output Capacitance
5 pF
TriodeConnectedAmplificationFactor
36
TriodeConnectedPlateResistance
7500 ohm
TriodeConnection
Data set 08
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Heater voltage
6.3 V
Published table
Heater current
300 mA
Published table
Plate resistance
1000000 ohm
Published table
Transconductance
5200 µS
Published table
Amplification factor
36
Published table
Other
Plate voltage
250 V
RFAmplifier
Screen voltage
150 V
RFAmplifier
Plate current
10.6 mA
RFAmplifier
Screen current
4.3 mA
RFAmplifier
Data set 09
1968 Mazda Belvu
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater voltage = ...…eccrerseersermescenserçeesesssesesesousess VË
6.3 V
Heater current …If
300 mA
Tension d'ANOËE L.………scosriesencenssensescenceoncessensesssesraerenaveenees VO
300 V
Screen-grid voltage … Ve
150 V
Screen-grid voltage àcourant nul ascssssssassseeeserssecen V 82 DL
300 V
Plate dissipation … asnoncrsosesssccoreausnerersenveemernsenseccsecnren PB
3 W
Screen-grid dissipation arsccsseressertenenaene se ssssecace en se sess se E 22
0.65 W
valeur de polarisation négative … … -VEg
50 V
valeur de polarisation positive … … Ve
0 V
Tension entre filament et cathod@ ……s VIE
180 V
Plate voltage … sevsestensessesenseneesenemenventencse | V 100 | 250
250 V
Screen-grid voltage … Vg, 100 | 125 |j
150 V
Plate resistance (approx.) p 0,5 | 1,5
1 MΩ
Characteristic
Capacitance d'Entré@ … …srenseeenenenesnmennätîssss CC
5.5 pF
InterelectrodeCapacitance
Capacitance d€ SOIÈLE .… …cessenssseencassrsssncancansemenens CS
5 pF
InterelectrodeCapacitance
Capacitance grille n° 1/ AN0d€ ………rrreereeereessene CB,/à
3.5 pF
InterelectrodeCapacitance
Capacitance d'Entrée …..……meemeeiassenenennnnnnnÜNCe
3.1 pF
InterelectrodeCapacitance
sossvens CS
1.7 pF
InterelectrodeCapacitance
Capacitance grille n° 1/ AN0d€ ………………ersecerrererres CB1/A
2.5 pF
InterelectrodeCapacitance