Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Voltage Pentode - Remote Cutoff (single) ·Pentode

4EH7

Semi-remote-cutoff pentode used as an IF amplifier in color and black-and-white television receivers. Its controlled transconductance provides automatic gain regulation in wideband television IF stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9A0
Socket code
B9A
Base pins
9
Nominal heater
4.4 V / 450 mA

Description

Semiremote-cutoff pentode used as an IF-amplifier tube in color and black-and-white television receivers.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
9A0
Socket code
B9A
Base pins
9
Nominal heater voltage
4.4 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9A0 - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
500000 Ω
Transconductance
0.0155 S
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
2.5 W
Max screen dissipation
0.7 W
Max cathode current
20 mA

Remote-cutoff pentode; promoted gm from published typical table.

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

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Input capacitance

    9.5 pF

    Published source value

  • Output capacitance

    3 pF

    Published source value

  • Plate-to-grid No. 1 capacitance

    0.005 pF

    Published source value

Other

  • Typical plate voltage

    200 V

    Published source value

  • Typical screen-grid voltage

    90 V

    Published source value

  • Typical plate current

    12 mA

    Published source value

  • Typical screen-grid current

    4.5 mA

    Published source value

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • TransconductancePublished

    15500 uS

Data set 03

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    250 V

    IF amplifier

  • Screen voltage

    250 V

    IF amplifier

  • Grid voltage

    -1.3 V

    IF amplifier

  • Plate current

    1 mA

    IF amplifier

  • Screen current

    4.1 mA

    IF amplifier

Characteristic

  • Transconductance

    15000 uS

    IF amplifier

Data set 04

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • CURRENT OPERATION

    30 mA

    Average Characteristics | CURRENT OPERATION. 450±30 MA.

  • MAXIMUM HEATER CATHODE VOLTAGE

    165 V

    Average Characteristics | MAXIMUM HEATER CATHODE VOLTAGE 165 VOLTS

  • HEATER WARM—UP TIME

    11 s

    Average Characteristics | HEATER WARM—UP TIME 11 SECONDS

  • PLATE DISSIPATION

    2.5 W

    Maximum Ratings | PLATE DISSIPATION 2.5 WATTS

  • GRID #

    250 V

    Maximum Ratings | GRID #2 VOLTAGE 250 VOLTS

  • GRID #

    0.65 W

    Maximum Ratings | GRID #2 DISSIPATION 0.65 WATTS

  • GRID #

    -2 V

    Maximum Ratings | GRID #1 VOLTAGE -2 -2 VOLTS

  • GRID #

    1250 ΜMHOS

    Maximum Ratings | GRID #1 CUTOFF: EC1 --6.5 1250 µMHOS

Data set 05

1967 Mullard Receiving and Amplifying Valves

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • I. 11.6 11.8 11 .7

    11.4 mA

    Published in approved EF183 target datasheet entry; Section1

  • Ig2 4.3 4.4 4.4

    4.3 mA

    Published in approved EF183 target datasheet entry; Section1

  • gm 12 .3 12.4 12 .2

    12 mA

    Published in approved EF183 target datasheet entry; Section1

  • Itota1 16 27 24

    21 mA

    Published in approved EF183 target datasheet entry; Section1

  • I. 11.8 11.9 12

    11.6 mA

    Published in approved EF183 target datasheet entry; Section1

  • Ig2 4.4 4.5 4.5

    4.4 mA

    Published in approved EF183 target datasheet entry; Section1

  • gm 12.3 12.5 12.5

    15.5 mA

    Published in approved EF183 target datasheet entry; Section1

  • ltotal 19.7 18 .5 14.7

    16 mA

    Published in approved EF183 target datasheet entry; Section1

  • la 11.7 12 11.8

    11.4 mA

    Published in approved EF183 target datasheet entry; Section1

  • Ig2 4.3 4.5 4.4

    4.3 mA

    Published in approved EF183 target datasheet entry; Section1

  • gm 12.4 13 12.3

    12 mA

    Published in approved EF183 target datasheet entry; Section1

  • Itotal 16 27 24

    21 mA

    Published in approved EF183 target datasheet entry; Section1

  • la 11.8 12

    12 mA

    Published in approved EF183 target datasheet entry; Section1

  • Ig2 4.4 4.5

    4.5 mA

    Published in approved EF183 target datasheet entry; Section1

  • gm 12 .4 12 .5 12

    5 mA

    Published in approved EF183 target datasheet entry; Section1

  • Ito'al 19.7 18.5

    17.5 mA

    Published in approved EF183 target datasheet entry; Section1

  • Pg2 max

    650 mW

    Published in approved EF183 target datasheet entry; Section1

  • Ik max

    20 mA

    Published in approved EF183 target datasheet entry; Section1

  • T bu1b max

    180 °C

    Published in approved EF183 target datasheet entry; Section1

Data set 06

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    200 V

    IF-Amplifier

  • Grid 2 voltage

    90 V

    IF-Amplifier

  • Grid 1 voltage

    -2 V

    IF-Amplifier

  • Plate current

    12 mA

    IF-Amplifier

  • Grid 2 current

    4.5 mA

    IF-Amplifier

Characteristic

  • Grid 1 impedance at 40 MHz

    13 kohm

    IF-Amplifier

  • Heater warm-up time

    11 s

    ControlledWarmUp

Data set 07

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater Voltage (ac/dc) 3.4 4.4

    6.3 V

    Published in approved XF183 target datasheet entry; Section1

  • Heater Current 0.6 0.45

    300 mA

    Published in approved XF183 target datasheet entry; Section1

  • Plate Supply Voltage

    550 V

    Published in approved XF183 target datasheet entry; Section1

  • Plate Voltage

    250 V

    Published in approved XF183 target datasheet entry; Section1

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

    0 V

    Published in approved XF183 target datasheet entry; Section1

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

    550 V

    Published in approved XF183 target datasheet entry; Section1

  • Grid-No.2 Voltage

    250 V

    Published in approved XF183 target datasheet entry; Section1

  • Cathode Current

    20 mA

    Published in approved XF183 target datasheet entry; Section1

  • Plate Dissipation

    2.5 W

    Published in approved XF183 target datasheet entry; Section1

  • Grid-No.2 Input

    0.65 W

    Published in approved XF183 target datasheet entry; Section1

  • Plate Voltage

    200 V

    Published in approved XF183 target datasheet entry; Section1

  • Grid-No.2 Voltage

    90 V

    Published in approved XF183 target datasheet entry; Section1

  • Plate Voltage 200 200 200

    200 V

    Published in approved XF183 target datasheet entry; Section1

  • Grid-No.2 Supply Voltage 200 200 200

    200 V

    Published in approved XF183 target datasheet entry; Section1

  • Grid-No.2 Series Resistor 22000 22000 22000

    22000 Ω

    Published in approved XF183 target datasheet entry; Section1

  • Transconductance 125 625 1250

    12500 µS

    Published in approved XF183 target datasheet entry; Section1

  • cross-modulation factor of 0.01 450 160

    100 mV

    Published in approved XF183 target datasheet entry; Section1

Characteristic

  • Grid-No. 1 Voltage

    -2 V

    Published in approved XF183 target datasheet entry; Section1

  • Plate Resistance (Approx.)

    0.5 MΩ

    Published in approved XF183 target datasheet entry; Section1

  • Transconductance

    12500 µS

    Published in approved XF183 target datasheet entry; Section1

  • Plate Current

    12 mA

    Published in approved XF183 target datasheet entry; Section1

  • Grid-No.2 Current

    4.5 mA

    Published in approved XF183 target datasheet entry; Section1