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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6EW6

Very-high-transconductance sharp-cutoff pentode for picture-IF amplification in VHF color and monochrome television receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7CM
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 400 mA

Description

Sharp-cutoff pentode used in gain-controlled picture-IF stages of VHF color and black-and-white television receivers.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7CM
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
400 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7CM - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G1AG1 — Control Grid

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN2KAK — Cathode

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN3H—H — Heater

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN4H—H — Heater

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN5PAP — Plate (Anode)

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN6G2AG2 — Screen Grid

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN7G3AG3 — Suppressor GridGroup 7CM7

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN7ISAIS — Internal ScreenGroup 7CM7

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
200000 Ω
Transconductance
0.014 S
Max plate voltage
330 V
Max screen voltage
300 V
Max plate dissipation
3.1 W
Max screen dissipation
0.65 W
Rectifier max heater-cathode voltage
200 V
Rectifier warm-up time
11 s

Sharp-cutoff pentode; screen voltage governed by published screen-rating chart.

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

  • Plate Dissipation

    3.1 W

Characteristic

  • Heater Warmup Time

    11 s

Data set 02

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage maximum

    330 V

  • Screen supply voltage maximum

    330 V

  • Grid2 input maximum

    0.65 W

  • Typical plate voltage

    125 V

  • Typical grid2 voltage

    125 V

  • Grid2 current

    3.2 mA

Capacitance

  • Grid1-to-plate capacitance maximum

    0.03 pF

  • Output capacitance shielded

    3.4 pF

Characteristics

  • Plate resistance

    200000 ohm

  • Transconductance

    15000 uS

Application

  • Application

    Television IF amplifier

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate_voltage

    125 V

    ClassA

  • Screen_voltage

    125 V

    ClassA

  • Cathode_bias_resistor

    56 ohm

    ClassA

Characteristic

  • Plate_current

    11 mA

    ClassA

  • Screen_current

    3 mA

    ClassA

Capacitance

  • Grid-1-to-plate capacitance maximum

    0.03 pF

  • Input capacitance

    10 pF

  • Output capacitance

    3.4 pF

Data set 04

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Screen Voltage

    125 V

    AverageCharacteristics

  • Plate Current

    11 mA

    AverageCharacteristics

  • Screen Current

    3.2 mA

    AverageCharacteristics

Data set 05

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    125 V

    ClassA

  • Plate current

    11 mA

    ClassA

  • Maximum plate voltage

    330 V

  • Maximum screen-grid voltage

    330 V

  • Grid No.1 to plate — published value 1

    0.04 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid No.1 to plate — published value 2

    0.03 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PLATE VOLTAGE

    330 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE

    0 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE

    330 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Positive-bias value

    0 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PLATE DISSIPATION

    3.1 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater negative with respect to cathode

    200 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater positive with respect to cathode

    200 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Characteristics

  • Plate resistance

    200000 ohm

    ClassA

  • Transconductance

    14000 uS

    ClassA

  • Voltage (AC or DC) — published value 1

    6.3 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Voltage (AC or DC) — published value 2

    10 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Current

    400 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • shield, grid No. 2, and

    2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • heater — published value 1

    10

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • heater — published value 2

    10

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • grid No. 2, and heater — published value 1

    2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • grid No. 2, and heater — published value 2

    2.4

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • grid No. 2, and heater — published value 3

    3.4

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Supply Voltage

    125 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.2 Supply Voltage

    125 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Cathode Resistor

    56 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Resistance (Approx )

    0.2 Mohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Transconductance

    14000

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.2 Current

    3.2 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • plate µa = 20 — published value 1

    20 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • plate µa = 20 — published value 2

    -3.5 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 1 -Grid No.l — published value 1

    1

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 1 -Grid No.l — published value 2

    6

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 2 -Cathode — published value 1

    2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 2 -Cathode — published value 2

    7

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 3-Heater

    3

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 4 -Heater

    4

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 5-Plate

    5

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • tween 165 and 330 volts — published value 1

    165 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • tween 165 and 330 volts — published value 2

    330 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID N~3 CONNECTED TO

    3

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • CATHODE AT SOCKET

    0

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID-N$2 VOLTS = 125 — published value 1

    2 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID-N$2 VOLTS = 125 — published value 2

    125 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PLATE VOLTS=125

    125 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • GRID-N42 VOLTS =125

    125 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Data set 06

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • order of

    40 MHz

    Published in approved 6EW6 target entry; Section1

  • Heater Voltage (ac/dc) 5.6

    6.3 V

    Published in approved 6EW6 target entry; Section1

  • Heater Current 0.45

    400 mA

    Published in approved 6EW6 target entry; Section1

  • Heater Warm-up Time (Average)

    11 seconds

    Published in approved 6EW6 target entry; Section1

  • Plate Voltage

    330 V

    Published in approved 6EW6 target entry; Section1

  • Grid No.3 (Suppressor-Grid) Voltage, Positive value

    0 V

    Published in approved 6EW6 target entry; Section1

  • Grid-No.2 (Screen-Grid) Supply Voltage

    330 V

    Published in approved 6EW6 target entry; Section1

  • Grid-No.l (Control-Grid) Voltage, Positive-bias value

    0 V

    Published in approved 6EW6 target entry; Section1

  • Plate Dissipation

    3.1 W

    Published in approved 6EW6 target entry; Section1

  • For grid-No.2 voltages up to

    165 V

    Published in approved 6EW6 target entry; Section1

  • For grid-No.2 voltages up to 165 volts

    0.65 W

    Published in approved 6EW6 target entry; Section1

  • For grid-No.2 voltages between 165 and

    330 V

    Published in approved 6EW6 target entry; Section1

Capacitance

  • Grid No. 3, and Internal Shield . 10

    10 pF

    Published in approved 6EW6 target entry; Section1

  • Grid No.3, and Internal Shield 2.4

    3.4 pF

    Published in approved 6EW6 target entry; Section1

Characteristic

  • Grid-No.2 Supply Voltage

    125 V

    Published in approved 6EW6 target entry; Section1

  • Cathode-Bias Resistor

    55 Ω

    Published in approved 6EW6 target entry; Section1

  • Plate Resistance (Approx.)

    0.2 MΩ

    Published in approved 6EW6 target entry; Section1

  • Grid-No.l Voltage (Approx.) for plate current of 20 juA

    3.5 V

    Published in approved 6EW6 target entry; Section1