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Power - Pentode (NOT beam) ·Pentode

837

Heater-cathode transmitting pentode for RF power-amplifier and oscillator service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7G
Base pins
7
Nominal heater
12.6 V / 700 mA

Description

Heater-cathode transmitting pentode for RF power-amplifier and oscillator 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
-
Socket code
B7G
Base pins
7
Nominal heater voltage
12.6 V
Nominal heater current
700 mA
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

Pentode

X-ray radiationInterelectrode capacitances
Transconductance
0.0034 S
Max plate voltage
500 V
Max screen voltage
200 V
Max plate dissipation
12 W

Published ratings and characteristics from source sheet.

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

1938 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • D-C Plate Voltace

    500 V

    D-C Plate Voltace.. 500 max. Volts

  • D-C Suppressor Voltage (Grid No. 3)

    200 V

    D-C Suppressor Voltage (Grid No. 3) 200 max. Volts

  • D-C Screen Voltage (Grid No. 2)

    200 V

    D-C Screen Voltage (Grid No. 2) 200 max. Volts

  • D-C Plate Current

    40 mA

    D-C Plate Current 40 max. Milliamperes

  • Plate Input

    16 W

    Plate Input 16 max. Watts

  • Suppressor Input

    5 W

    Suppressor Input 5 max. Watts

  • Screen Input

    5 W

    Screen Input 5 max. Watts

  • Plate Dissipation

    12 W

    Plate Dissipation 12 max. Watts

  • D-C Plate Voltage ... 400 500

    500 V

    D-C Plate Voltage ... 400 500 500 Volts

  • D-C Screen Voltage .............. 200 200

    200 V

    D-C Screen Voltage .............. 200 200 200 Volts

  • Peak R-F Grid Voltage . 28 25

    24 V

    Peak R-F Grid Voltage . 28 25 24 Volts

  • D-C Screen Current .. 10 15

    12 mA

    D-C Screen Current .. 10 15 12 Milliamperes

  • D-C Plate Voltage

    500 V

    D-C Plate Voltage ... 500 max.Volts

  • D-C Screen Voltage (Grid No. 2)

    200 V

    D-C Screen Voltage (Grid No. 2) ... 200 max.Volts

  • D-C Grid Voltage (Grid No. 1)

    -200 V

    D-C Grid Voltage (Grid No. 1) ... -200 max.Volts

  • D-C Plate Current

    40 mA

    D-C Plate Current... 40 max.Milliamperes

  • D-C Grid Current

    8 mA

    D-C Grid Current ..... 8 max. Milliamperes

  • Plate Input

    16 W

    Plate Input... 16 max. Watts

  • D-C Plate Voltage.. 400

    500 V

    D-C Plate Voltage.. 400 500 Volts

  • D-C Grid Voltage .. -20

    -20 V

    D-C Grid Voltage .. -20 -20 Volts

  • Peak R-F Grid Voltage. 45

    32 V

    Peak R-F Grid Voltage. 45 32 Volts

  • Peak A-F Suppressor Voltage. 55

    65 V

    Peak A-F Suppressor Voltage. 55 65 Volts

  • D-C Plate Current..... 35

    30 mA

    D-C Plate Current..... 35 30 Milliamperes

  • D-C Screen Current... 37

    23 mA

    D-C Screen Current... 37 23 Milliamperes

  • D-C Grid Current (Approx.) . 8

    3.5 mA

    D-C Grid Current (Approx.) . 8 3.5 Milliamperes

  • Screen Resistor. 6500

    14000 Ω

    Screen Resistor. 6500 14000 Ohms

  • Grid Resistor .-. 2500

    5700 Ω

    Grid Resistor .-. 2500 5700 Ohms

  • Driving Power (Approx.) .-... 0.4

    0.1 W

    Driving Power (Approx.) .-... 0.4 0.1 Watt

  • Power Output (Approx.) ...... 4

    5 W

    Power Output (Approx.) ...... 4 5 Watts

  • D'C Plate Voltage

    500 V

    D'C Plate Voltage 500 max. Volts

  • D-C Suppressor Voltage (Grid No. 3)

    200 V

    D-C Suppressor Voltage (Grid No. 3) 200 max. Volts

  • D-C Screen Voltage (Grid No. 2)

    200 V

    D-C Screen Voltage (Grid No. 2) 200 max. Volts

  • D-C Grid Voltage (Grid No. 1)

    -200 V

    D-C Grid Voltage (Grid No. 1) -200 max. Volts

  • D'C Plate Current

    40 mA

    D'C Plate Current 40 max. Milliamperes

  • Plate Input

    16 W

    Plate Input 16 max. Watts

  • Suppressor Input

    5 W

    Suppressor Input 5 max. Watts

  • Screen Input

    5 W

    Screen Input 5 max. Watts

  • Plate Dissipation

    12 W

    Plate Dissipation 12 max. Watts

  • D-C Screen Voltage --- 200 200

    200 V

    D-C Screen Voltage --- 200 200 200 Volts

  • D-C Grid Voltage -- -50 -45

    -43 V

    D-C Grid Voltage -- -50 -45 -43 Volts

  • Peak R'F Grid Voltage --- 58 48

    44 V

    Peak R'F Grid Voltage --- 58 48 44 Volts

  • D-C Plate Current .. 35 30

    30 mA

    D-C Plate Current .. 35 30 30 Milliamperes

  • Power Output (Approx.) - 4 5

    5.5 W

    Power Output (Approx.) - 4 5 5.5 Watts

  • D-C Plate Voltage .. 400 max

    400 V

    D-C Plate Voltage .. 400 max. 400 max. Volts

  • D-C Screen Voltage*** _:_ 200 max

    200 V

    D-C Screen Voltage*** _:_ 200 max. 200 max. Volts

  • D'C Grid Voltage (Grid No. 1)_ -200 max

    -200 V

    D'C Grid Voltage (Grid No. 1)_ -200 max. -200 max. Volts

  • D-C Plate Current ..— 50 max

    50 mA

    D-C Plate Current ..— 50 max. 50 max. Milliamperes

  • D-C Grid Current _ 8 max

    8 mA

    D-C Grid Current _ 8 max. 8 max. Milliamperes

  • Plate Input _ 20 max

    20 W

    Plate Input _ 20 max. 20 max. Watts

  • Screen Input*** __—. 5 max

    7.5 W

    Screen Input*** __—. 5 max. 7.5 max. Watts

  • Plate Dissipation- 8 max

    8 W

    Plate Dissipation- 8 max. 8 max. Watts

  • D-C Plate Voltage--- 400

    400 V

    D-C Plate Voltage--- 400 400 Volts

  • D'C Grid Voltage .. -40

    -70 V

    D'C Grid Voltage .. -40 -70 Volts

  • Peak R-F Grid Voltage . 60

    100 V

    Peak R-F Grid Voltage . 60 100 Volts

  • D-C Plate Current .. 45

    45 mA

    D-C Plate Current .. 45 45 Milliamperes

  • D'C Screen Current .. 20

    30 mA

    D'C Screen Current .. 20 30 Milliamperes

  • Grid Resistor . 8000

    10000 Ω

    Grid Resistor . 8000 10000 Ohms

  • Driving Power (Approx.) .. 0.3

    0.7 W

    Driving Power (Approx.) .. 0.3 0.7 Watt*

  • D-C Plate Voltage . 500 max

    500 V

    D-C Plate Voltage . 500 max. 500 max. Volts

  • D-C Screen Voltage*** . 200 max

    200 V

    D-C Screen Voltage*** . 200 max. 200 max. Volts

  • D-C Grid Volt. (Grid No. 1). -200 max

    -200 V

    D-C Grid Volt. (Grid No. 1). -200 max. -200 max. Volts

  • D-C Plate Current . 80 max

    80 mA

    D-C Plate Current . 80 max. 80 max. Milliamperes

  • D-C Grid Current .. 8 max

    8 mA

    D-C Grid Current .. 8 max. 8 max. Milliamperes

  • Plate Input . 32 max

    32 W

    Plate Input . 32 max. 32 max. Watts

  • Suppressor Input

    5 W

    Suppressor Input . 5 max. Watts

  • Screen Input*** . 8 max

    8 W

    Screen Input*** . 8 max. 8 max. Watts

  • Plate Dissipation . 12 max

    12 W

    Plate Dissipation . 12 max. 12 max. Watts

  • D-C Plate Voltage . 500 500 400

    500 V

    D-C Plate Voltage . 500 500 400 500 Volts

  • D-C Grid Voltage ... -85 -75 -70

    -70 V

    D-C Grid Voltage ... -85 -75 -70 -70 Volts

  • D-C Screen Current ... 30 15 25

    15 mA

    D-C Screen Current ... 30 15 25 15 Milliamperes

  • D-C Grid Current (Approx.) 8 4 8

    8 mA

    D-C Grid Current (Approx.) 8 4 8 8 Milliamperes

  • For high-frequency operation above

    20 MHz

    For high-frequency operation above 20 megacycles, see page 144.

Data set 02

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • HeaterOrFilamentVoltage

    12.6 V

  • HeaterOrFilamentCurrent

    700 mA

Other

  • FrequencyForMaximumRatings

    20 MHz

  • Power Output

    45 W

    ClassC

Data set 03

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • HeaterOrFilamentVoltage

    12.6 V

  • HeaterOrFilamentCurrent

    700 mA

Other

  • MaximumOperatingFrequency

    20 MHz

    Reduced ratings may apply at upper frequencies