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Power - Triode ·Triode

834

Directly heated radiation-cooled power triode for RF oscillator and amplifier service, primarily as a replacement type. Approximately 50 W plate dissipation and kilovolt plate capability provide moderate transmitter output.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
UX4
Base pins
-
Nominal heater
7.5 V / 3.25 A

Description

Radiation-cooled directly heated RF oscillator and amplifier triode for replacement service.

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
UX4
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
10.5
Max plate voltage
1250 V
Max plate dissipation
50 W

Maximum ratings and characteristic constants promoted where reliably published in the approved 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

Triode

Other

  • high as

    100 MHz

    high as 100 megacycles; it may be operated at reduced plate voltage and input up

  • services is

    50 W

    services is 50 watts.

  • D-C Plate Voltage

    1250 V

    D-C Plate Voltage . 1250 max. Volts

  • D-C Plate Current

    100 mA

    D-C Plate Current . 100 max. Milliamperes

  • Plate Input

    75 W

    Plate Input .. 75 max. Watts

  • Plate Dissipation

    50 W

    Plate Dissipation . 50 max. Watts

  • D-C Plate Voltage ... 750 1000

    1250 V

    D-C Plate Voltage ... 750 1000 1250 Volts

  • Peak R-F Grid Voltage . 90 100

    115 V

    Peak R-F Grid Voltage . 90 100 115 Volts

  • D-C Plate Current ... 50 50

    50 mA

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

  • D-C Crid Current (Approx.) . 1 0.5

    0 mA

    D-C Crid Current (Approx.) . 1 0.5 0 Milliampere

  • Driving Power (Approx.)t ... 3.3 3.1

    3 W

    Driving Power (Approx.)t ... 3.3 3.1 3 Watts

  • D-C Plate Voltage

    1000 V

    D-C Plate Voltage ... 1000 max. Volts

  • D-C Grid Voltage

    -400 V

    D-C Grid Voltage . -400 max. Volts

  • D-G Pi ate Current

    100 mA

    D-G Pi ate Current . . 100 max. Milliamperes

  • D-C Grid Current

    20 mA

    D-C Grid Current . 20 max. Milliamperes

  • Plate Input

    100 W

    Plate Input . 100 max. Watts

  • Plate Dissipation

    35 W

    Plate Dissipation . 35 max. Watts

  • Power Output (Approx.) ... 42

    58 W

    Power Output (Approx.) ... 42 58 Watts

  • D-C Plate Voltage

    1250 V

    D-C Plate Voltage .. 1250 max. Volts

  • D-C Grid Voltage

    -400 V

    D-C Grid Voltage . -400 max. Volts

  • D-C Grid Current

    20 mA

    D-C Grid Current .. ... 20 max. Milliamperes

  • Plate Dissipation

    50 W

    Plate Dissipation .. 50 max. Watts

  • D-C Plate Voltage .... 750 1000

    1250 V

    D-C Plate Voltage .... 750 1000 1250 Volts

  • D-C Plate Current ... 90 90

    90 mA

    D-C Plate Current ... 90 90 90 Milliamperes

  • Grid Resistor ...-... 8750 11400

    15000 Ω

    Grid Resistor ...-... 8750 11400 15000 Ohms

  • each stated value of grid voltage should be decreased by

    5 V

    each stated value of grid voltage should be decreased by 5 volts and the circuit returns made to the

  • at frequencies higher than

    60 MHz

    at frequencies higher than 60 megacycles, forced cooling of the tube is recom¬

  • For high-frequency operation above

    100 MHz

    For high-frequency operation above 100 megacycles, see page 144.

Data set 02

1945 United Electronics

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Filament voltage

    7.5 V

  • Filament current

    3.25 A

Other

  • Maximum direct plate voltage

    1000 V

  • Maximum plate dissipation

    50 W

Data set 03

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    7.5 V

  • HeaterOrFilamentCurrent

    2 A

Data set 04

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    1250 V

    RFPowerAmplifier

  • Plate current

    100 mA

    RFPowerAmplifier

  • Power output

    75 W

    RFPowerAmplifier

  • Control-grid voltage

    -225 V

    RFPowerAmplifier

  • Grid current

    15 mA

    RFPowerAmplifier

  • Maximum frequency at full input

    100 MHz

    RFPowerAmplifier

Capacitance

  • Grid-to-plate capacitance

    2.6 pF

    Section1

  • Grid-to-filament capacitance

    2.2 pF

    Section1

  • Plate-to-filament capacitance

    0.6 pF

    Section1