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Power - Triode ·Triode

UH50

Eimac radiation-cooled ultra-high-frequency power triode with directly heated thoriated-tungsten filament. Approximately 50 W plate dissipation and kilovolt-class capability suit compact UHF transmitting applications.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
7.5 V / 3.25 A

Description

Radiation cooled; ultra high frequency triode embodying all of the superior constructional features common to Eimac tubes but specially designed to be directly interchangeable with certain conventional Tantalum elements specially treated by the exclusive Eimac process, the new Eimac thoriated tungsten filament, elimination of the need for a “getter,” and the long, severe exhaust give this tube vastly superior performance capabilities, yet in physical appearance it is

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
7.5 V
Nominal heater current
3.25 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

Triode

X-ray radiationInterelectrode capacitances
Amplification factor
10.6
Max plate voltage
1250 V
Max plate dissipation
50 W

Promoted fields populated only where the published value maps directly to the schema; device-specific values retained as parameters.

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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • UH5

    0

    UH50 is unconditionally guaranteed against tube failures resulting

  • Filament Voltage

    75

    Filament Voltage - - - - - . - - . - . . . - 75Vols

  • Amplification Factor -~

    106

    Amplification Factor -~ - - - - - - - - - - - - . 106

  • Grid-Plate Capacity

    2.6 pF

    Grid-Plate Capacity - - - - - - - . - - - . 2.6 mmfds.

  • Grid-Filament Capacity

    2.2 pF

    Grid-Filament Capacity - - - - - - - - - - . 2.2 mmfds.

  • Maximum Plate Voltage

    1250 V

    Maximum Plate Voltage - - - - - - - - - - . 1250 Volts

  • Plate Dissipation

    50 W

    Plate Dissipation - - - - - - - - - - - - - - 50 Watts

  • Grid Current (milliamperes) [1]

    25 mA

    Grid Current (milliamperes) - 25 25

  • Grid Current (milliamperes) [2]

    25 mA

    Grid Current (milliamperes) - 25 25

  • Plate Current (milliamperes) [1]

    125 mA

    Plate Current (milliamperes) - 125 125 . . i .

  • Plate Current (milliamperes) [2]

    125 mA

    Plate Current (milliamperes) - 125 125 . . i .

  • Plate Dissipation (watts) [1]

    50 W

    Plate Dissipation (watts) - - - 50 50 Typical Operating Conditions for Class “C"” Telegraphy

  • Plate Dissipation (watts) [2]

    50 W

    Plate Dissipation (watts) - - - 50 50 Typical Operating Conditions for Class “C"” Telegraphy

  • fate Voltage Plate Volts [1]

    1000 V

    fate Voltage Plate Volts - - - - - - - - - - . 1000 1250

  • fate Voltage Plate Volts [2]

    1250 V

    fate Voltage Plate Volts - - - - - - - - - - . 1000 1250

  • As frequency is increased circuit inefficiencies may necessitate a re- Plate Current (milliamperes) [1]

    125 mA

    As frequency is increased circuit inefficiencies may necessitate a re- Plate Current (milliamperes) - - - - 125 125

  • As frequency is increased circuit inefficiencies may necessitate a re- Plate Current (milliamperes) [2]

    125 mA

    As frequency is increased circuit inefficiencies may necessitate a re- Plate Current (milliamperes) - - - - 125 125

  • duction of plate voltage or plate current so that maximum dissipation Grid Current (milliamperes) [1]

    20 mA

    duction of plate voltage or plate current so that maximum dissipation Grid Current (milliamperes) - - - - - 20 20

  • duction of plate voltage or plate current so that maximum dissipation Grid Current (milliamperes) [2]

    20 mA

    duction of plate voltage or plate current so that maximum dissipation Grid Current (milliamperes) - - - - - 20 20

  • Power Output (watts) [1]

    94 W

    Power Output (watts) - - - - - - - 94 115

  • Power Output (watts) [2]

    115 W

    Power Output (watts) - - - - - - - 94 115

  • Plate Current (milliamperes) [1]

    115 mA

    Plate Current (milliamperes) - - - 115 125 125 ] ) :

  • Plate Current (milliamperes) [2]

    125 mA

    Plate Current (milliamperes) - - - 115 125 125 ] ) :

  • Plate Current (milliamperes) [3]

    125 mA

    Plate Current (milliamperes) - - - 115 125 125 ] ) :

  • Grid Current (fnilliampzres)) [1]

    20

    Grid Current (fnilliampzres))- - - - 20 20 20 Plate is designed to operate at a cherry-red color on its normal dissipation

  • Grid Current (fnilliampzres)) [2]

    20

    Grid Current (fnilliampzres))- - - - 20 20 20 Plate is designed to operate at a cherry-red color on its normal dissipation

  • Grid Current (fnilliampzres)) [3]

    20

    Grid Current (fnilliampzres))- - - - 20 20 20 Plate is designed to operate at a cherry-red color on its normal dissipation

  • Power Output (watts) [1]

    60 W

    Power Output (watts) - - - - - - 60 95 115 temperatures are perfectly permissible and no damage will result from

  • Power Output (watts) [2]

    95 W

    Power Output (watts) - - - - - - 60 95 115 temperatures are perfectly permissible and no damage will result from

  • Power Output (watts) [3]

    115 W

    Power Output (watts) - - - - - - 60 95 115 temperatures are perfectly permissible and no damage will result from

  • Excitation power roughly [1]

    1

    Excitation power roughly 1/10 the input power, cator will be readily appreciated as you become familiar with the UHS50.

  • Excitation power roughly [2]

    10

    Excitation power roughly 1/10 the input power, cator will be readily appreciated as you become familiar with the UHS50.

  • Excitation power roughly [3]

    0

    Excitation power roughly 1/10 the input power, cator will be readily appreciated as you become familiar with the UHS50.