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Power - Triode ·Triode

865

High-mu transmitting triode retained primarily for renewal service in older RF power equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
UX4
Base pins
-
Nominal heater
7.5 V / 2 A

Description

High-mu transmitting triode retained primarily for renewal 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
2 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
0.00075 S
Amplification factor
150
Max plate voltage
750 V
Max screen voltage
175 V
Max plate dissipation
15 W

Promoted ratings/characteristics from 865.pdf.

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

    7.5 V

    Nominal

  • HeaterCurrentNominal

    2 A

    Nominal

  • Maximum Plate Voltage

    750 V

  • Maximum Screen Voltage

    175 V

  • Maximum Plate Dissipation

    15 W

  • Maximum Frequency

    15 MHz

    Published full-rating frequency guidance

Characteristic

  • Transconductance

    750 µS

    Typical

  • Amplification Factor

    150

    Typical

Data set 02

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    7.5 V

  • HeaterOrFilamentCurrent

    2 A