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Voltage Radio Detector Converter ·Heptode

6BE6

Widely used miniature pentagrid oscillator-converter for superheterodyne radio receivers, combining local oscillation and mixing in one envelope for compact AM receiver frequency-changing stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7CH
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 300 mA

Description

Indirectly heated heptode intended for frequency-converter 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: 7CH
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

7CH - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1G1	A	G1 — Control Grid Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN2G5	A	G5 — Fifth GridGroup 7CH2 Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN2K	A	K — CathodeGroup 7CH2 Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN3H	—	H — Heater Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN4H	—	H — Heater Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN5P	A	P — Plate (Anode) Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN6G2	A	G2 — Screen GridGroup 7CH6 Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN6G4	A	G4 — Fourth GridGroup 7CH6 Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN7G3	A	G3 — Suppressor Grid Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH

Section ratings

1 physical section, each with unique specifications.

Section 1

Heptode

X-ray radiationInterelectrode capacitances

Plate resistance: 1000000 Ω
Transconductance: 0.000475 S
Max plate voltage: 300 V
Max screen voltage: 100 V
Max plate dissipation: 1 W
Max screen dissipation: 1 W
Max cathode current: 14 mA
Rectifier max heater-cathode voltage: 100 V

Published converter characteristic is conversion transconductance, preserved as a parameter rather than promoted as generic transconductance.

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

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristic

Heater Voltage
6.3 V
Heater Current
300 mA
MaximumOscillatorFrequency
60 MHz
Stable self-oscillating frequency changer above this region

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

Plate voltage
250 V
ClassA; OperatingPoint1
Screen voltage
100 V
ClassA; OperatingPoint1
Control-grid bias
1.5 V
ClassA; OperatingPoint1
Plate current
2.9 mA
ClassA; OperatingPoint1
Screen current
6.8 mA
ClassA; OperatingPoint1
Plate resistance
1000000 ohm
ClassA; OperatingPoint1
Transconductance
475 uS
ClassA; OperatingPoint1
Plate voltage
100 V
ClassA; OperatingPoint2
Screen voltage
100 V
ClassA; OperatingPoint2
Control-grid bias
1.5 V
ClassA; OperatingPoint2
Plate current
2.6 mA
ClassA; OperatingPoint2
Screen current
7 mA
ClassA; OperatingPoint2
Plate resistance
400000 ohm
ClassA; OperatingPoint2
Transconductance
455 uS
ClassA; OperatingPoint2

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristic

Conversion Transconductance
475 uS
Typical
Plate Resistance
1000000 ohm
Typical

Data set 04

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

Plate voltage
250 V
Published table
Screen voltage
100 V
Published table
Control-grid bias
-1.5 V
Published table
Plate current
2.9 mA
Published table
Screen current
6.8 mA
Published table
Oscillator grid voltage
-3 V
Converter Oscillator
Oscillator grid current
0.5 mA
Converter Oscillator

Characteristic

Transconductance
475 µS
Published table
Plate resistance
1000000 ohm
Published table
Heater voltage
6.3 V
Published heater rating
Heater current
300 mA
Published heater rating

Data set 05

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristics

Heater voltage
6.3 V
Heater current
300 mA
Conversion transconductance
475 uS
Oscillator transconductance
7250 uS
Oscillator amplification factor
20

Other

Maximum plate voltage
300 V
Maximum grids 2 and 4 voltage
100 V
Maximum plate dissipation
1 W
Maximum grids 2 and 4 dissipation
1 W
Maximum total cathode current
14 mA
Typical plate voltage
250 V
Typical grids 2 and 4 voltage
100 V

Data set 06

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

Screen Supply Voltage
300 V
Plate Voltage
100 V
ConverterService; PlateVoltage=100V; ScreenVoltage=100V
Screen Voltage
100 V
ConverterService; PlateVoltage=100V; ScreenVoltage=100V
Grid3 Voltage
-1.5 V
ConverterService; PlateVoltage=100V; ScreenVoltage=100V
Grid1VoltageRMS
10 V
ConverterService; PlateVoltage=100V; ScreenVoltage=100V
Grid1 Resistance
20000 ohm
ConverterService; PlateVoltage=100V; ScreenVoltage=100V
Plate Voltage
250 V
ConverterService; PlateVoltage=250V; ScreenVoltage=100V
Screen Voltage
100 V
ConverterService; PlateVoltage=250V; ScreenVoltage=100V
Grid3 Voltage
-1.5 V
ConverterService; PlateVoltage=250V; ScreenVoltage=100V
Grid1VoltageRMS
10 V
ConverterService; PlateVoltage=250V; ScreenVoltage=100V

Characteristic

Plate Resistance
400000 ohm
ConverterService; PlateVoltage=100V; ScreenVoltage=100V
Conversion Transconductance
455 uS
ConverterService; PlateVoltage=100V; ScreenVoltage=100V
Plate Current
2.6 mA
ConverterService; PlateVoltage=100V; ScreenVoltage=100V
Screen Current
7 mA
ConverterService; PlateVoltage=100V; ScreenVoltage=100V
Cathode Current
10.1 mA
ConverterService; PlateVoltage=100V; ScreenVoltage=100V

Data set 07

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

Heater voltage
6.3 V
Heater current
300 mA
Plate voltage …..…..….….….…… … Va
300 V
Tension de gmlles n°2 et bn …… VE21+E4
100 V
Tension de grilles n° 2 et n° 4 à courant nul … V@-8,bl
300 V
Plate dissipation ... recerseesen P
1 W
Dissipation des grilles n°2 et n° 4 ucroone PE2+84
1 W

Characteristic

Capacitance d'entrée oscillateur (grille n°1) …… Ce (g,)
5.5 pF
InterelectrodeCapacitance
Capacitance d'entrée mélangeur (grille n° 3)
7.2 pF
InterelectrodeCapacitance
Capacitance de SOrtiE….….….…..……eanentssnnennnes
3.6 pF
InterelectrodeCapacitance
Capacitance grille n°3/anode …….….…..……...……eececissens
0.3 pF
InterelectrodeCapacitance
Capacitance grille n° 1/ grille n°3 .…n Ce,/ 8
0.15 pF
InterelectrodeCapacitance
Capacitance grille n° 1/ anode ……c Cg,/a
0.05 pF
InterelectrodeCapacitance
Capacitance grille n° 1/ cathode- ……s Cg,/k
2.8 pF
InterelectrodeCapacitance

Data set 08

1969 Tesla Manual of Electronic Tubes

Published operating points and test conditions from this source.

SECTION 1

Heptode

Application

Application
MixerFrequencyConverter text

Data set 09

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

Voltage (AC or DC) ± %
63 V
PublishedColumn1
Voltage (AC or DC) ± %
10 V
PublishedColumn2
Current at
6.3 V

Capacitance

trodes IRF input)
7 pF
PublishedColumn1
(Mixer input)
8 pF
PublishedColumn1
(Mixer input)
13 pF
PublishedColumn2
trodes (Osci llator input)
5.5 pF
PublishedColumn1
Grid No. to plate max. max
3 pF
PublishedColumn1
Grid No. to plate max. max
0.25 pF
PublishedColumn2
Grid No. to grid No max. max
0.15 pF
PublishedColumn1
Grid No. to plate. max. max
0.1 pF
PublishedColumn1
Grid No. to plate. max. max
0.05 pF
PublishedColumn2
Grid No.l to cathode &grid No.S
3 pF
PublishedColumn1
electrodes except grid No.l
15 pF
PublishedColumn1

Data set 10

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Heptode

Capacitance

Grid No.3-to-plate capacitance
0.3 pF
Unshielded
Grid No.3-to-grid No.1 capacitance
0.16 pF
Unshielded
Grid No.1-to-plate capacitance
0.1 pF
Unshielded
Grid No.3-to-all-other-electrodes capacitance
7 pF
Unshielded
Grid No.1-to-all-other-electrodes capacitance
5.5 pF
Unshielded
Plate-to-all-other-electrodes capacitance
8 pF
Unshielded

Other

Plate voltage
100 V
ConverterSeparateExcitation
Conversion transconductance
455 uS
ConverterSeparateExcitation;PlateVoltage=100V
Plate current
2.6 mA
ConverterSeparateExcitation;PlateVoltage=100V
Plate voltage
250 V
ConverterSeparateExcitation
Conversion transconductance
475 uS
ConverterSeparateExcitation;PlateVoltage=250V
Plate current
2.9 mA
ConverterSeparateExcitation;PlateVoltage=250V
Screen-grid current
6.8 mA
ConverterSeparateExcitation;PlateVoltage=250V
Oscillator-grid current
0.5 mA
ConverterSeparateExcitation