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Power - Tetrode (NOT beam) (over 1000V 100W) ·Tetrode

4X150A

Forced-air-cooled external-anode radial-beam tetrode for mobile, wide-band, video, and RF power-amplifier service, with useful operation extending to approximately 500 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B8G
Base pins: 9
Nominal heater: 6 V / 2.6 A

Description

4X150A is a Tetrode device. Forced-air-cooled external-anode tetrode for high-power mobile and wide-band/video amplifier service.

Socket description

Loctal 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B8G
Base pins: 9
Nominal heater voltage: 6 V
Nominal heater current: 2.6 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

Tetrode

X-ray radiationInterelectrode capacitances

Transconductance: 0.012 S
Amplification factor: 5
Max plate voltage: 1250 V
Max screen voltage: 300 V
Max plate dissipation: 250 W
Max screen dissipation: 12 W
Max grid dissipation: 2 W
Max cathode current: 250 mA

Promoted from printed maximum-rating and general-characteristics tables.

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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

rating of 26.5 + 10% volts,
10 V
rating of 26.5 + 10% volts,
0.58 ampere.
580 mA
0.58 ampere.
Unipotential Cathode For Use at Frequencies Up to 500 Mc 2-15/32" Max. Length
32 MHz
Unipotential Cathode For Use at Frequencies Up to 500 Mc 2-15/32" Max. Length
Compact Design 370 Watts CW Output up to 150 Mc Integral Radiator
150 W
Compact Design 370 Watts CW Output up to 150 Mc Integral Radiator
140 Watts CW Output at
500 W
140 Watts CW Output at 500 Mc
service at frequencies up to 500 Mc. 1t is and heater . . [
16 MHz
service at frequencies up to 500 Mc. 1t is and heater . . [ 16 prf
useful as an af power amplifier and modulator, a and heater . . . e e e e
4.4
useful as an af power amplifier and modulator, a and heater . . . e e e e 4.4 gt
linear rf power amplifier Maximum Overall Length. e
32
linear rf power amplifier Maximum Overall Length. e 2-15/32"
amplifier or oscillator. Johnson No,
-1
amplifier or oscillator. Johnson No,124-110-1
250 watts. air over the base seals; past the grid-No.2 seal, glass
2 W
250 watts. air over the base seals; past the grid-No.2 seal, glass
cies up to 150 Mc, itoffers substantially higher altitudes and ambient temperatures,the air flow mus
150 MHz
cies up to 150 Mc, itoffers substantially higher altitudes and ambient temperatures,the air flow must be
250 watts with no sacrifice in tube reliability. altitudes and ambient temperatures, the air flow mu
250 W
250 watts with no sacrifice in tube reliability. altitudes and ambient temperatures, the air flow must be
DC PLATE VOLTAGE . e e e 2000 max, volts
2000 V
DC PLATE VOLTAGE . e e e 2000 max, volts
DC GRID-No.2 (SCREEN) VOLTAGE. . . . . 400 max. volts
400 V
DC GRID-No.2 (SCREEN) VOLTAGE. . . . . 400 max. volts
MAX.-SIGNAL OC PLQTE CURRENT . . . . . 250 max. ma
250 mA
MAX.-SIGNAL OC PLQTE CURRENT . . . . . 250 max. ma
GENERAL DATA PLATE DISSIPATION . . . « . « « & « « 250 max. watts
250 W
GENERAL DATA PLATE DISSIPATION . . . « . « « & « « 250 max. watts
Electrical: GRID-NC.2 DISSIPATION 12 max, watts
12 W
Electrical: GRID-NC.2 DISSIPATION 12 max, watts
voltage (AC or 0c)® . . . . . . . ... 6.0+10% volis Heater negative with
10 V
voltage (AC or 0c)® . . . . . . . ... 6.0+10% volis Heater negative with
respect to cathode . 150 max. volts
150 V
respect to cathode . 150 max. volts
Current at 6.0 volts . e e e
2.6 V
Current at 6.0 volts . e e e 2.6 amperes
Minimum heating time . . . e 30 seconds respect to cathocde . 150 max. volts
150 V
Minimum heating time . . . e 30 seconds respect to cathocde . 150 max. volts
for grid-No.2 volts =
300 V
for grid-No.2 volts = 300 and
Typical CCS Operation: Typical CCS Operation (With bandwidth of
5 MHz
Typical CCS Operation: Typical CCS Operation (With bandwidth of 5 Mc):
DC Plate voltage . . . . . . . 750 1000
1250 V
DC Plate voltage . . . . . . . 750 1000 1250 volts
DC Grid-No.2 voltage . . . . . 300 300
300 V
DC Grid-No.2 voltage . . . . . 300 300 300 volts
DC Plate voltage . . . . . 800 1000 1500
2000 V
DC Plate voltage . . . . . 800 1000 1500 2000 volts
DC Grid-No.1 voltage . . . . . -60 -65 =
70 V
DC Grid-No.1 voltage . . . . . -60 -65 =70 volts
DC Grid-No.2 voltage . . . 300 300 300
300 V
DC Grid-No.2 voltage . . . 300 300 300 300 volts
Peak RF Grid-No
1 V
Peak RF Grid-No.1 voltage:
Grid) voltage. . . . . . -40 -43 -50 -50 volts Synchronizing level. . . . . 85 95
100 V
Grid) voltage. . . . . . -40 -43 -50 -50 volts Synchronizing level. . . . . 85 95 100 volts
Peak AF Grid-No.1-to—Grid— Pedestal level . . . . . . . 65 70
75 V
Peak AF Grid-No.1-to—Grid— Pedestal level . . . . . . . 65 70 75 volts

Data set 02

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Construction

Cooling method
Forced air

Application

Service
RF power amplifier / oscillator

Data set 03

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Maximum full-rating frequency
500 MHz

Construction

Cooling method
Forced air

Data set 04

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Plate voltage
1250 V
RFAmplifierOrOscillator; ClassC; Telegraphy
Plate current
200 mA
RFAmplifierOrOscillator; ClassC; Telegraphy
RF output power
195 W
RFAmplifierOrOscillator; ClassC; Telegraphy
Grid voltage
-90 V
RFAmplifierOrOscillator; ClassC; Telegraphy
Grid current
11 mA
RFAmplifierOrOscillator; ClassC; Telegraphy
Maximum frequency at full input rating
500 MHz
Screen voltage
250 V
RFAmplifierOrOscillator; ClassC; Telegraphy

Capacitance

Grid-to-plate capacitance
0.03 pF
Grid-to-filament/cathode capacitance
15.7 pF
Plate-to-filament/cathode capacitance
4.3 pF

Data set 05

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Capacitance

Input Capacitance
15.7 pF
Output Capacitance
4.5 pF
Feedback Capacitance
0.03 pF

Other

Frequency of Maximum Rating
150 MHz
Maximum DC Plate Current
250 mA
ClassAB1
Typical Linear Plate Voltage
2000 V
ClassAB1
Typical Linear Plate Output Power
300 W
ClassAB1
Class C Plate-Modulated Maximum Plate Voltage
1600 V
ClassC;Telephony

Characteristic

Highest Useful Frequency
500 MHz

Data set 06

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Plate voltage
1250 V
RFAmplifierOrOscillator; ClassC; Telegraphy
Plate current
200 mA
RFAmplifierOrOscillator; ClassC; Telegraphy
RF output power
195 W
RFAmplifierOrOscillator; ClassC; Telegraphy
Grid voltage
-90 V
RFAmplifierOrOscillator; ClassC; Telegraphy
Grid current
11 mA
RFAmplifierOrOscillator; ClassC; Telegraphy
Maximum frequency at full input rating
500 MHz
Screen voltage
250 V
RFAmplifierOrOscillator; ClassC; Telegraphy

Capacitance

Grid-to-plate capacitance
0.03 pF
Grid-to-filament/cathode capacitance
15.7 pF
Plate-to-filament/cathode capacitance
4.3 pF

Data set 07

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

Voltage (AC or DC)a — published value 1
6
Published datasheet value
Voltage (AC or DC)a — published value 2
0
Published datasheet value
Voltage (AC or DC)a — published value 3
10
Published datasheet value
Current at heater volts = 6.0 — published value 1
6 A
Published datasheet value
Current at heater volts = 6.0 — published value 2
26 A
Published datasheet value
/'"'~,
300
Published datasheet value
grid-No.2 ma. = 50 — published value 1
50 mA
Published datasheet value
grid-No.2 ma. = 50 — published value 2
5 mA
Published datasheet value
Grid No.l to plate
0.03
Published datasheet value
and heater
16
Published datasheet value
and heater — published value 1
4
Published datasheet value
and heater — published value 2
4
Published datasheet value
Pin 1 -Grid No.24 — published value 1
1
Published datasheet value
Pin 1 -Grid No.24 — published value 2
8
Published datasheet value
Pin 3 -Heater
3
Published datasheet value
Pin 4 -Cathode
4
Published datasheet value
Pin 7 -Heater
7
Published datasheet value
20° C
20
Published datasheet value
DC Plate Voltage — published value 1
800
Published datasheet value
DC Plate Voltage — published value 2
1000
Published datasheet value
DC Plate Voltage — published value 3
1500
Published datasheet value

Other

for each class of service, a minimum air flow of 5.6 cfim
5.6
Published datasheet value
class of service, a minimum air flow of 5.3 cfm must
5.3 cfm
Published datasheet value
of plate surface at junction with fins)
250 mA
Published datasheet value
Temperature of Plate Seal
200 mA
Published datasheet value
Grid—No.2 Seal
175 mA
Published datasheet value
DC PLATE VOLTAGE
2 A
Published datasheet value
DC GRID—No.2 (SCREEN~RID) VOLTAGE
400 mA
Published datasheet value
MAX.—SIGNAL DC PLATE CURRENTh
250 mA
Published datasheet value
GRID—No.2 INPUTh
12 mA
Published datasheet value
PLATE DISSIPATIONh
250 mA
Published datasheet value
Heater negative with respect to cathode
150 mA
Published datasheet value

Data set 08

199X Svetlana

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Maximum Plate Voltage
2000 V
Maximum Screen Voltage
400 V
Maximum Plate Dissipation
250 W
Maximum Screen Dissipation
12 W