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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6BC5

Sharp-cutoff pentode for compact RF/IF equipment operating at frequencies extending to approximately 400 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7BC
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 600 mA

Description

Sharp-cutoff pentode used as an RF or IF amplifier in compact radio equipment at frequencies up to 400 MHz.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7BC
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7BC - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1F	—	F — Filament EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7BC
PIN22P	B	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7BC
PIN32G1	B	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7BC
PIN4FCT	—	FCT — Filament Center Tap EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7BC
PIN51G1	A	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7BC
PIN61P	A	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7BC
PIN7F	—	F — Filament EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 128, 7BC

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 800000 Ω
Transconductance: 0.0061 S
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 2.3 W
Max screen dissipation: 0.55 W
Rectifier max heater-cathode voltage: 200 V
Rectifier warm-up time: 11 s

Published promoted fields populated semantically; identical repeated sections compressed where applicable.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Heater Voltage. ....................... 3.15 4,2 6.3 Volts
6.3 V
Heater Voltage. ....................... 3.15 4,2 6.3 Volts
Heater Current. .. ..................... 600 450 300 Ma
300 mA
Heater Current. .. ..................... 600 450 300 Ma
Output. . .o 2.6 1.8 uuf
1.8 pF
Output. . .o 2.6 1.8 uuf
Plate Voltage. . ....... ........iuuenone. 300 300 Volts
300 V
Plate Voltage. . ....... ........iuuenone. 300 300 Volts
Piate Dissipation. ............. ... ... 2.53 2.0 Watts
2 W
Piate Dissipation. ............. ... ... 2.53 2.0 Watts
Grid No. 2 Supply Voltage.................. Plate 300 Volts
300 V
Grid No. 2 Supply Voltage.................. Plate 300 Volts
Grid No. 2 Dissipation. .................... 0.5 Watts
0.5 W
Grid No. 2 Dissipation. .................... 0.5 Watts
Plate Voltage. .. ............... ...t 100 125 250 Volts
250 V
Plate Voltage. .. ............... ...t 100 125 250 Volts
Grid No. 2 Voltage. . ..................... 100 125 150 Volts
150 V
Grid No. 2 Voltage. . ..................... 100 125 150 Volts
Transconductance. . ...................... 4900 6100 5700 umhos
5700 umhos
Transconductance. . ...................... 4900 6100 5700 umhos
Plate Resistance (approx.)................. 0.6 0.5 0.8 Megohm
0.8 Megohm
Plate Resistance (approx.)................. 0.6 0.5 0.8 Megohm
Plate Current. . ........... .. ..ooiiinn. 4.7 8.0 7.5 Ma
7.5 mA
Plate Current. . ........... .. ..ooiiinn. 4.7 8.0 7.5 Ma
Grid No.2 Current. .. ..........oooiunn. 1.4 2.4 2.1 Ma
2.1 mA
Grid No.2 Current. .. ..........oooiunn. 1.4 2.4 2.1 Ma
Grid No. 1 Voltage for lp= 10pua........... -5 -6 -8 Volts
-8 V
Grid No. 1 Voltage for lp= 10pua........... -5 -6 -8 Volts
Plate Voltage. . ............ccovvvnninnoin, 250 180 Volts
180 V
Plate Voltage. . ............ccovvvnninnoin, 250 180 Volts
Transconductance. . ...........c.c.ovenve... 4400 6000 umhos
6000 umhos
Transconductance. . ...........c.c.ovenve... 4400 6000 umhos
Plate Resistance (approx.}.................. 9000 6000 Ohms
6000 Ohms
Plate Resistance (approx.}.................. 9000 6000 Ohms
Plate Current. ........c.oviviniiininnnns 6.0 8.0 Ma
8 mA
Plate Current. ........c.oviviniiininnnns 6.0 8.0 Ma

Other

Grid No. 2 Voltage. . ...................... Plate See Rating Chart
2 V
Grid No. 2 Voltage. . ...................... Plate See Rating Chart

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
PentodeConnection; OperatingPoint1
Screen voltage
150 V
PentodeConnection; OperatingPoint1
Plate current
7.5 mA
PentodeConnection; OperatingPoint1
Screen current
2.1 mA
PentodeConnection; OperatingPoint1
Plate resistance
800000 ohm
PentodeConnection; OperatingPoint1
Transconductance
5700 uS
PentodeConnection; OperatingPoint1
Plate voltage
125 V
PentodeConnection; OperatingPoint2
Screen voltage
125 V
PentodeConnection; OperatingPoint2
Plate current
8 mA
PentodeConnection; OperatingPoint2
Screen current
2.4 mA
PentodeConnection; OperatingPoint2
Plate resistance
500000 ohm
PentodeConnection; OperatingPoint2
Transconductance
6100 uS
PentodeConnection; OperatingPoint2
Plate voltage
100 V
PentodeConnection; OperatingPoint3
Screen voltage
100 V
PentodeConnection; OperatingPoint3
Cathode resistor
180 ohm
PentodeConnection; OperatingPoint3
Plate current
4.7 mA
PentodeConnection; OperatingPoint3
Screen current
1.4 mA
PentodeConnection; OperatingPoint3
Plate resistance
600000 ohm
PentodeConnection; OperatingPoint3
Transconductance
4900 uS
PentodeConnection; OperatingPoint3
Plate voltage
250 V
TriodeConnection; OperatingPoint4
Cathode resistor
820 ohm
TriodeConnection; OperatingPoint4
Plate current
6 mA
TriodeConnection; OperatingPoint4
Plate resistance
9000 ohm
TriodeConnection; OperatingPoint4
Transconductance
4400 uS
TriodeConnection; OperatingPoint4
Amplification factor
40
TriodeConnection; OperatingPoint4
Plate voltage
180 V
TriodeConnection; OperatingPoint5

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Transconductance
6100 uS
Typical
Heater Warmup Time
11 s

Data set 04

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
125 V
Screen-grid voltage
125 V
Cathode bias resistor
100 Ohm
Plate current
8 mA
Screen-grid current
2.4 mA

Characteristics

Plate resistance
500000 Ohm
Transconductance
6100 uS
Maximum useful frequency
400 MHz
Approximate

Capacitance

Grid-to-plate capacitance
0.02 pF
Shielded
Input capacitance
6.5 pF
Shielded
Output capacitance
2.6 pF
Shielded

Data set 05

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Voltage ac or do
6.3 V
Current
300 mA
PLATE VOLTAGE max
300 V
GRID-No. (SCREEN) SUPPLY VOLTAGE max
2 V
PublishedColumn1
GRID-No. (SCREEN) SUPPLY VOLTAGE max
300 V
PublishedColumn2
Positive bias value max
0 V
PLATE DISSIPATION max
2 W
For grid-No. voltages up to
2 V
PublishedColumn1
For grid-No. voltages up to
150 V
PublishedColumn2
and
300 V
Heater negative with respect to cathode. max
90 V
Heater positive with respect to cathode. max
90 V

Capacitance

Grid No.l to plate max. max
0.03 pF
PublishedColumn1
Grid No.l to plate max. max
0.02 pF
PublishedColumn2
and heater
6.5 pF
PublishedColumn1
and heater
6.6 pF
PublishedColumn2
and heater
1.8 pF
PublishedColumn1
and heater
2.6 pF
PublishedColumn2
and grid No
2.5 pF
PublishedColumn1
shield, and heater
3.9 pF
PublishedColumn1
shield, and heater
4 pF
PublishedColumn2
shield, and heater .G
3 pF
PublishedColumn1
shield, and heater .G
4.3 pF
PublishedColumn2

Characteristics

Plate Voltage
125 V
PublishedColumn1
Plate Voltage
250 V
PublishedColumn2
Grid-No. Voltage
125 V
PublishedColumn1

Data set 06

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

rf or if amplifier at frequencies up to
400 MHz
Published in approved 6CE5 target datasheet entry; Section1
Heater Voltage (ac/dc) 3.15
6.3 V
Published in approved 6CE5 target datasheet entry; Section1
Heater Current 0.6
300 mA
Published in approved 6CE5 target datasheet entry; Section1
Heater Warm-up Time (Average)
11 seconds
Published in approved 6CE5 target datasheet entry; Section1
Grid-No.l (Control-Grid) Voltage, Positive-bias value. 0.006 0
0 V
Published in approved 6CE5 target datasheet entry; Section1
For grid-No.2 voltages up to
150 V
Published in approved 6CE5 target datasheet entry; Section1
For grid-No.2 voltages between 160 and
300 V
Published in approved 6CE5 target datasheet entry; Section1

Capacitance

Internal Shield
6.5 pF
Published in approved 6CE5 target datasheet entry; Section1
Shield
1.8 pF
Published in approved 6CE5 target datasheet entry; Section1
Grid No.l to Plate and Grid No.2
2.5 pF
Published in approved 6CE5 target datasheet entry; Section1
Grid No.l to Cathode, Heater, Grid No.3, and Internal Shield
3.9 pF
Published in approved 6CE5 target datasheet entry; Section1

Characteristic

Cathode-Bias Resistor 820 180 100
180 Ω
Published in approved 6CE5 target datasheet entry; Section1
Plate Resistance (Appro*.) 0.009 0.6 0.5
0.8 MΩ
Published in approved 6CE5 target datasheet entry; Section1
Transconductance 4400 4900 6100
6700 µS
Published in approved 6CE5 target datasheet entry; Section1
Plate Current 8 6 4.7 8
7.6 mA
Published in approved 6CE5 target datasheet entry; Section1
Grid-No.2 Current — — 1.4 2.4
2.1 mA
Published in approved 6CE5 target datasheet entry; Section1