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Power - Beam (NOT sweep) (over 1000V 100W) ·BeamPower

4E27A

Higher-dissipation 4E27 transmitting tube for RF amplification, oscillator and modulator service, capable of hundreds of watts Class-C RF output.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
J5
Base pins
-
Nominal heater
5 V / 7.5 A

Description

Higher-dissipation beam power transmitting tube for AF/RF amplifier, modulator, and oscillator service.

Socket description

Jumbo 5-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
J5
Base pins
-
Nominal heater voltage
5 V
Nominal heater current
7.5 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

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

Beam Power

X-ray radiationInterelectrode capacitances
Transconductance
0.00215 S
Max plate voltage
4000 V
Max screen voltage
750 V
Max plate dissipation
125 W
Max screen dissipation
20 W
Max grid dissipation
5 W

Single electrical section; values mapped from printed ratings/characteristics.

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

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Maximum full-rating frequency

    75 MHz

Data set 02

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • The Eimac

    5.125 a

    The Eimac 4E27A/5.125B is a power pentode intended for use as a modulator, oscillator or

  • eliminated entirely. The tube has a maximum plate-dissipation rating of

    125 a

    eliminated entirely. The tube has a maximum plate-dissipation rating of 125 watts and a maximum

  • plate voltage rating of

    75 volts

    plate voltage rating of 4000 volts at frequencies up to 75 Mc. Cooling is by convection and radia-

  • The

    375 watts

    The 4E27A/5-125B in class-C r-f service will deliver up to 375 watts plate power output with

  • less than

    75 watts

    less than 2 watts driving power. It will deliver up to 75 watts of carrier for suppressor modulation.

  • Two

    300 watts

    Two 4E27A/5-125B's will deliver up to 300 watts maximum-signal plate power output in class

  • AB, modulator service,

    400 watts

    AB, modulator service, 400 watts in class AB, with less than | watt driving power.

  • Voltage

    5 volts

    Voltage 5.0 volts

  • Current

    1.5 amperes

    Current - - - 1.5 amperes

  • Zero Suppressor Yolts,

    500 Volts

    Zero Suppressor Yolts, 500 Screen Volts

  • OR OSCILLATOR D.C Plate Voltage

    3000 volts

    OR OSCILLATOR D.C Plate Voltage - - . - 1000 2000 2500 3000 volts

  • Class-C Telegraphy or FM Telephony, Frequencies up to

    200 volts

    Class-C Telegraphy or FM Telephony, Frequencies up to 75 Me. D-C Grid Voltage - - - - =120 ~i50 —170 —200 volts

  • {Key-down conditions, per tube) D-C Plate Current

    167 ma

    {Key-down conditions, per tube) D-C Plate Current - - - - 145 200 184 167 ma

  • MAXIMUM RATINGS D-C Screen Current* - - - t

    12 ma

    MAXIMUM RATINGS D-C Screen Current* - - - t7 23 8 12 ma

  • D-C PLATE VOLTAGE

    9 VOLTS

    D-C PLATE VOLTAGE - 4000 MAX. VOLTS D-C Grid Current* . - . . I3 I 9 ma

  • D-C SCREEN VOLTAGE

    270 VOLTS

    D-C SCREEN VOLTAGE - 750 MAX. VOLTS Peak R-F Grid Input VYoltage - 170 240 250 270 volts

  • D-C GRID VOLTAGE - —

    1.9 watts

    D-C GRID VOLTAGE - —500 MAX. YOLTS Driving Power* - - . - 1.0 26 23 1.9 watts

  • D-C PLATE CURRENT

    8 MA

    D-C PLATE CURRENT - 200 MAX. MA Grid Dissipation® - - - - 3 1.0 .8 watts

  • PLATE DISSIPATION

    9 WATTS

    PLATE DISSIPATION - 125 MAX. WATTS Screen Dissipation* - - - . 85 12 9 watts

  • SUPPRESSOR DISSIPATION

    125 WATTS

    SUPPRESSOR DISSIPATION . 20 MAX. WATTS Plate Dissipation - - - - S5 125 125 125 watts

  • SCREEN DISSIPATION

    460 WATTS

    SCREEN DISSIPATION - 20 MAX, WATTS Plate Power Input - - - - 148 400 460 watts

  • GRID DISSIPATION

    375 WATTS

    GRID DISSIPATION - 5 MAX. WATTS Plate Power Output - . - 90 275 335 375 watts

  • D-C Plate Voltage

    3000 volts

    D-C Plate Voltage 1000 1500 2000 2500 30080 volts D-C Plate Voltage - - - - 1000 1500 2000 2500 3000 volts

  • D-C Grid Voltage - o

    225 volts

    D-C Grid Voltage - o120 —130 —I50 —170 —200 volts D-C Grid Voltage - - - - —I70 —180 —=200 -225 volts

  • D-C Plate Current

    167 ma

    D-C Plate Current - - 167 200 200 186 187 ma D-C Plate Current - - - - 160 200 200 186 167 ma

  • D-C Suppressor Current® [

    12 ma

    D-C Suppressor Current® [ - 4 3 3 ma D-C Screen Current* - - - 21 24 22 12 ma

  • D-C Screen Curcent* - n H ]

    4 ma

    D-C Screen Curcent* - n H ] 7 S ma 0-C Grid Current* - - 3 ] 4 ma

  • D-C Grid Current*

    270 ma

    D-C Grid Current* 6 8 8 7 6 ma Peak R-F Grid Inpuf Vol'aqe - 208 257 270 volts

  • Peak R-F Grid |npuf'vouage

    260 volts

    Peak R-F Grid |npuf'vouage 170 200 222 240 260 volts

  • Driving Power*

    1.6 watts

    Driving Power* 1.0 16 1.8 1.7 1.6 watts

  • Grid Dissipation*

    2 watts

    Grid Dissipation* 3 K3 K 5 6 watts Grid Dissipation* - - A 3 2 watts

  • Screen Dissipation*

    9 watts

    Screen Dissipation* 5.5 55 &5 35 25 watts Screen Dissipation* - - - 16 17 9 watts

  • Plate Dissipation

    125 watts

    Plate Dissipation - 47 85 100 t15 125 watts Plate Dissipation - - - - 45 100 11§ 125 watts

  • Plate Power Input

    500 watts

    Plate Power Input - 167 300 400 485 500 watts Plate Power Input - - - 160 300 400 445 500 watts

  • Plate Power Output

    375 watts

    Plate Power Output 120 215 300 350 75 watts Plate Power Output - - - Hs 218 300 350 375 watts

  • (Effective

    1968 A

    (Effective 8-15-52) c 1968 by Varian Printed in U.S.A.

  • Zero Suppressor Volts,

    500 Volts

    Zero Suppressor Volts, 500 Screen Yolts

  • Class-C Telephony, Frequencias up to

    2500 volts

    Class-C Telephony, Frequencias up to 75 Mc. D-C Pla.fc VYoltage - - - . - {000 1500 2000 2500 volts

  • D-C Plate Current

    152 ma

    D-C Plate Current - - - - - 149 150 IS1 152 ma

  • MAXIMUM RATINGS D-C Screen Current* <

    16 ma

    MAXIMUM RATINGS D-C Screen Current* < - - - 20 18 17 16 ma

  • D-C PLATE VOLTAGE

    8 VOLTS

    D-C PLATE VOLTAGE - - - 3200 MAX. VOLTS D-C &rid Current* . - . - - 7 7 8 8 ma

  • D-C SCREEN VOLTAGE

    750 VOLTS

    D-C SCREEN VOLTAGE - - . 750 MAX. VOLTS ool oo,o Modutation)

  • i - e

    350 volts

    i - e .- 380 350 350 350 volts

  • D-C GRID VOLTAGE

    275 volts

    D-C GRID VOLTAGE - . . - -500 MAX. YOLTS Peak R-F Grid Input Volfage - . 20 265 270 275 volts

  • D-C PLATE CURRENT

    2 MA

    D-C PLATE CURRENT - - - 160 MAX, MA Driving Power* - - - - - 2 2 2 2 watts

  • PLATE DISSIPATION

    5 WATTS

    PLATE DISSIPATION - - - . 85 MAX, WATTS Grid Dissipation® - - - - - 05 05 05 05 waths

  • SUPPRESSOR DISSIPATION

    20 WATTS

    SUPPRESSOR DISSIPATION - - 20 MAX. WATTS payba o/

  • SCREEN DISSIPATION

    380 WATTS

    SCREEN DISSIPATION - - - 20 MAX. WATTS Plate Power Input - - - - . 149 225 300 380 watts

  • GRID DISSIPATION

    295 WATTS

    GRID DISSIPATION - - - - 5 MAX. WATTS Plate Power Qutput - - . . - 85 53 220 295 watts

  • RADIO-FREQUENCY AMPLIFIER D-C Plate Voltage - - - - - [S

    3000 volts

    RADIO-FREQUENCY AMPLIFIER D-C Plate Voltage - - - - - [S00 2000 2500 3000 volts

  • Class-C Telephony Frequencies up to

    350 volts

    Class-C Telephony Frequencies up to 75 Mc D-C Suppressor Voltage - - - - =220 --260 —305 —350 volts

  • {Carrier conditions, per tube, unless otherwise specified) * (

    350 volts

    {Carrier conditions, per tube, unless otherwise specified) * (100% fi:;fi:iron)o aq-. - - - 220 260 305 350 volts

  • MAXIMUM RATINGS D-C Screen Yoltage

    400 volts

    MAXIMUM RATINGS D-C Screen Yoltage - - - - - 400 400 400 400 volts

  • Fixed D-C Screen VYoltage

    610 volts

    Fixed D-C Screen VYoltage - - - 610 645 650 610 volts

  • D-C PLATE VOLTAGE

    8300 ohms

    D-C PLATE VOLTAGE - - - 4000 MAX. YOLTS Screen Dropping Resistor! - - - 5500 910010,000 8300 ohms

  • D-C Grid Voltage - - - - - —~I

    200 volts

    D-C Grid Voltage - - - - - —~I70 ~180 —|90 —200 volts

  • D-C SCREEN VOLTAGE

    0 ma

    D-C SCREEN VOLTAGE - - - 750 MAX. YOLTS D-C Plate Current - - - . - & 59 5 &0 ma

  • D-C Screen Current*

    25 ma

    D-C Screen Current* - - - - 38 27 25 25 ma

  • D-C GRID VOLTAGE - - - - =

    4 ma

    D-C GRID VOLTAGE - - - - =500 MAX. YOLTS D-C Grid Current* - - - . . . 5 5 4 ma

  • D-C PLATE CURRENT - . R

    250 MA

    D-C PLATE CURRENT - . R 200 MAX. MA Peak R-F Grid Input Voliage - - - 230 235 245 250 volts

  • Driving Power®

    1.2 watts

    Driving Power® - - - - - 14 13 12 1.2 watts

  • PLATE DISSIPATION

    20 WATTS

    PLATE DISSIPATION - - - - 126 MAX, WATTS Grid Dissipation* -« -« -~ 35 25 25 .20 watts

  • Screen Dissipation* - - - - - i

    10 watts

    Screen Dissipation* - - - - - i5 1 10 10 watts

  • SUPPRESSOR DISSIPATION

    105 WATTS

    SUPPRESSOR DISSIPATION - 20 MAX. WATTS blate Dissipation T T s s 8 105 waths

  • SCREEN DISSIPATION

    7 WATTS

    SCREEN DISSIPATION - . - 20 MAX. WATTS blate Power OuBut -+ o . 15 B0 81 7 watts

  • GRID DISSIPATION

    1 WATTS

    GRID DISSIPATION - - - - 5 MAX. WATTS 1Adjust to stated d-¢ screen voltage.

  • OR MODULATOR D-C Plate VYoltage

    2500 volts

    OR MODULATOR D-C Plate VYoltage - - - - - 1500 2000 2500 volts

  • Class-AB, Sinusoidal Wave D-C Suppressor Voltage

    0 volts

    Class-AB, Sinusoidal Wave D-C Suppressor Voltage - - - - 0 0 0 volts

  • D-C Screen Yoltage - - B

    500 volts

    D-C Screen Yoltage - - B - - 500 500 500 volts

  • MAXIMUM RATINGS (Per Tube) D-C Grid Voltage! N

    85 volts

    MAXIMUM RATINGS (Per Tube) D-C Grid Voltage! N -70 —80 —85 volts

  • Zero-Signal D-C Plate Currenf

    65 ma

    Zero-Signal D-C Plate Currenf - . 110 85 65 ma

  • D-C PLATE VOLTAGE ) ) )

    220 VOLTS

    D-C PLATE VOLTAGE ) ) ) 4000 MAX. VOLTS Max-Signal D-C Plate Current - 205 210 220 ma

  • Max-Signal D-C Screen Current*

    8 ma

    Max-Signal D-C Screen Current* - - 1S 13 8 ma

  • D-C GRID YOLTAGE

    0 ohms

    D-C GRID YOLTAGE - - - - -500 MAX. YOLTS Effective Plate-to-Plate load - - - 13,700 18,00020,000 ohms

  • Peak A-F Grid VYoltage {per tube)

    85 A

    Peak A-F Grid VYoltage {per tube) - 70 80 85 volts

  • D-C PLATE CURRENT

    0 MA

    D-C PLATE CURRENT - - - 200 MAX. MA Max-Signal Driving Power* - - 0 0 0 watts

  • PLATE DISSIPATION

    300 WATTS

    PLATE DISSIPATION - - - - 125 MAX. WATTS Max-Signal Plate Power Output - . 200 250 300 watts

  • SUPPRESSOR DISSIPATION

    20 WATTS

    SUPPRESSOR DISSIPATION - - 20 MAX. WATTS iAdiust fo stated

  • SCREEN DISSIPATION

    20 WATTS

    SCREEN DISSIPATION - - - 20 MAX. WATTS TYPICAL OPERATION (Two fubes unfess ofherwise specified)

  • GRID DISSIPATION

    5 WATTS

    GRID DISSIPATION . - . - 5 MAX. WATTS Class-AB,

  • D-C Plate Voltage - - - B

    2500 volts

    D-C Plate Voltage - - - B - 1500 2000 2500 volts

  • D-C Suppressor Yoltage

    0 volts

    D-C Suppressor Yoltage - - - - 60 0 0 volts

  • D-C Screen Voltage

    500 volts

    D-C Screen Voltage - - - - - 500 500 500 volts

  • D-C Grid VYoltage! - - - -~

    5 volts

    D-C Grid VYoltage! - - - -~70 -~-80 ~B85 volts

  • Zero-Signal D-C Plate Currenf

    65 ma

    Zero-Signal D-C Plate Currenf - - 110 85 65 ma

  • Max-Signal D-C Plate Current

    250 ma

    Max-Signal D-C Plate Current - - 35 295 250 ma

  • Zero-Signal D-C Screen Current*

    0 ma

    Zero-Signal D-C Screen Current* - - 0 0 0 ma

  • Max-Signal D-C Screen Current* - - h

    13 ma

    Max-Signal D-C Screen Current* - - h 16 13 ma

  • Effective Plate-to-Plate Load

    0 ohms

    Effective Plate-to-Plate Load - - - 730013,00020,000 ohms

  • Peak A-F Grid Input Voltage (per tube)

    95 A

    Peak A-F Grid Input Voltage (per tube) - 100 100 95 volts

  • Max-Signal Driving Power*

    2 watts

    Max-Signal Driving Power* - - - 05 03 02 watts

  • Max-Signal Plate Power Input

    625 watts

    Max-Signal Plate Power Input - - 6§50 590 625 watts

  • Max-Signal Plate Power Output

    400 watts

    Max-Signal Plate Power Output - - 300 356 400 watts

  • Cooling —A heat dissipating connector (Eimac HR

    20 A

    Cooling —A heat dissipating connector (Eimac HR-5 or equiva- cess of the 20 watt maximum rating. The tube may be protected

  • or when the flow of air is restricted, it may become necessary Plate Dissipation —Plate di

    25 watt

    or when the flow of air is restricted, it may become necessary Plate Dissipation —Plate dissipation in excess of the [25-watt

  • value of

    5 volts

    value of 5.0 volts. Variations shouid be held within the range of tube. Power-supply leads entering the amplifier should be by-

  • Grid Voltage —Although a maximum of —

    500 a

    Grid Voltage —Although a maximum of —500 volts bias may be antenna feeders should be arranged so as to preclude any

  • SCREEN VOLTAGE =

    500 VOLTS

    SCREEN VOLTAGE = 500 VOLTS

  • SUPPRESSOR VOLTAGE =

    0 VOLTS

    SUPPRESSOR VOLTAGE = 0 VOLTS