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Power - Triode ·Triode

861

High-mu transmitting triode designed for radio-frequency power-amplifier and oscillator service in professional transmitting equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
UX4
Base pins
4
Nominal heater
11 V / 10 A

Description

High-mu transmitting triode for RF power-amplifier and oscillator 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
4
Nominal heater voltage
11 V
Nominal heater current
10 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
Transconductance
0.0021 S
Amplification factor
300
Max plate voltage
3500 V
Max screen voltage
750 V
Max plate dissipation
400 W
Max cathode current
350 mA

Published maximum ratings and characteristic values promoted from the approved source.

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

  • HeaterVoltageNominal

    11 V

    Nominal

  • HeaterCurrentNominal

    10 A

    Nominal

  • Maximum Plate Voltage

    3500 V

  • Maximum Screen Voltage

    750 V

  • Maximum Plate Dissipation

    400 W

  • Maximum Frequency

    20 MHz

    Published full-rating frequency guidance

  • RFPowerOutput

    700 W

    ClassC Telegraphy; 3500 V plate

Characteristic

  • Transconductance

    2100 µS

    Typical

  • Amplification Factor

    300

    Typical

Data set 02

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    11 V

  • HeaterOrFilamentCurrent

    10 A

Other

  • MaximumOperatingFrequency

    63 MHz

    Reduced ratings may apply at upper frequencies