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Power - Triode ·Triode

843

Heater-cathode power triode designed for RF amplifier and oscillator service. Moderate plate dissipation and several-hundred-volt operation provide useful radio-frequency output from an indirectly heated cathode.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
UX4
Base pins
4
Nominal heater
2.5 V / 2.5 A

Description

Heater-cathode power triode for RF 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
2.5 V
Nominal heater current
2.5 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
7.7
Max plate voltage
550 V
Max plate dissipation
15 W

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

    2.5 V

    Nominal

  • HeaterCurrentNominal

    2.5 A

    Nominal

  • Maximum Plate Voltage

    550 V

  • Maximum Plate Dissipation

    15 W

  • Maximum Frequency

    6 MHz

    Published full-rating frequency guidance

Characteristic

  • Amplification Factor

    7.7

    Typical

Data set 02

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    2.5 V

  • HeaterOrFilamentCurrent

    2.5 A

Other

  • MaximumOperatingFrequency

    80 MHz

    Reduced ratings may apply at upper frequencies