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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6GX6

Dual-control sharp-cutoff pentode for television FM detection, gated AGC, and noise-inverter signal-processing circuits.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7EN
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 450 mA

Description

Sharp-cutoff dual-control-grid pentode for gated AGC and television noise-inverter 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: 7EN
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

7EN - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1G1	A	G1 — Control Grid Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EN
PIN2IS	A	IS — Internal ScreenGroup 7EN2 Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EN
PIN2K	A	K — CathodeGroup 7EN2 Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EN
PIN3H	—	H — Heater Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EN
PIN4H	—	H — Heater Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EN
PIN5P	A	P — Plate (Anode) Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EN
PIN6G2	A	G2 — Screen Grid Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EN
PIN7G3	A	G3 — Suppressor Grid Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EN

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 140000 Ω
Transconductance: 0.0037 S
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 1.7 W
Max screen dissipation: 1 W
Max grid dissipation: 0.1 W

Dual-control pentode; grid-3-to-plate transconductance preserved as 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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater voltage
6.3 V
Heater current
450 mA
Plate voltage
300 V
Typical operating conditions
Plate current
3.7 mA
Typical operating conditions

Data set 02

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Grid 1 to plate capacitance
0.026 pF
Grid 1 input capacitance
8 pF
Grid 1 to grid 3 capacitance
0.12 pF
Grid 3 to plate capacitance
1.6 pF
Grid 3 total capacitance
6.5 pF

Other

Plate supply voltage
150 V
ClassA1
Grid 2 supply voltage
100 V
ClassA1
Cathode resistor
180 ohm
ClassA1
Plate current
3.7 mA
ClassA1
Grid 2 current
3 mA
ClassA1

Characteristics

Grid 3 transconductance
750 µS
ClassA1

Data set 03

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Grid3 Transconductance
750 uS
Typical Plate Current
3.7 mA
Typical Screen Current
3 mA

Other

TypicalPlateSupplyVoltage
150 V
TypicalScreenSupplyVoltage
100 V

Data set 04

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
150 V
ClassA
Plate current
3.7 mA
ClassA
Maximum plate voltage
330 V
Maximum screen-grid voltage
330 V
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.
For grid-No.2 voltages up to 150 volts — published value 1
150 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
For grid-No.2 voltages up to 150 volts — published value 2
1 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
GRID-No.3 INPUT
0.1 mA
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
PLATE DISSIPATION
1.7 mA
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Heater negative with respect to cathode
200 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Heater positive with respect to cathode
2006 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Grid-No.3-Circuit Resistance — published value 1
0 mA
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Grid-No.3-Circuit Resistance — published value 2
68 mA
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
For fixed-bias operation
0.22 mA
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
For cathode-bias operation — published value 1
0 mA
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
For cathode-bias operation — published value 2
47 mA
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.

Characteristics

Plate resistance
140000 ohm
ClassA
Transconductance
3700 uS
ClassA
Voltage (AC or DC)
6.3 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
6 A
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.
Grid No.1 to plate
0.022
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
and heater
8
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Grid No.3 to plate
1.6
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Grid No.l to grid No 3 — published value 1
3
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Grid No.l to grid No 3 — published value 2
0.11
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
No.1, and heater
7.5
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Plate Supply Voltage
150 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Grid-No.3 Supply Voltage
0 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Grid-No.2 Supply Voltage
100 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
180 ohm
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Plate Resistance (Approx )
0.14 Mohm
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Transconductance, Grid No.l to Plate
3700
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Transconductance, Grid No.3 to Plate
750
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Plate Current
3.7 mA
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Grid-No.2 Current
3 mA
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
for plate µa = 20 — published value 1
20 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
for plate µa = 20 — published value 2
-4.5 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
for plate µa = 20 — published value 1
20 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
for plate µa = 20 — published value 2
-7 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 -Cathode, — published value 1
2
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
Pin 2 -Cathode, — 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.
For grid-No.2 voltages between 150
150 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
and 300 volts
300 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
GRID-No.2 VOLTS=100
100 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
PLATE (Iy)OR GRID-No.2 (I~2) MILLIAMPERES
2 mA
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
PLATE VOLTS=150
150 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
GRID—No.2 VOLTS=100
100 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
GRID—Na2 VOLTS=100
100 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.
GRID—No.2 VOLTS = 100
100 V
Published datasheet value; multiple values on one source row represent separate limits or operating conditions.

Data set 05

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Grid No.1-to-plate capacitance
0.026 pF
Grid No.1-to-Grid No.3 capacitance
0.12 pF
Grid No.3-to-plate capacitance
1.6 pF

Other

Plate supply voltage
150 V
ClassA
Screen-grid supply voltage
100 V
ClassA
Cathode-bias resistor
180 ohm
ClassA
Plate current
3.7 mA
ClassA
Peak positive-pulse plate voltage
600 V
GatedAGC

Characteristic

Transconductance Grid No.3 to plate
750 uS