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T55

High-frequency Taylor transmitting triode designed for substantial RF output through approximately 60 MHz. Rated around 55 W plate dissipation and 2.5 kV, it combines moderate plate voltage with practical grid-drive requirements.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: UX4
Base pins: 4
Nominal heater: 7.5 V / 3.25 A

Description

High-frequency transmitting triode designed for substantial power output through about 60 MHz with moderate plate voltage and grid drive.

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: 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

Plate resistance: 9000 Ω
Transconductance: 0.0022 S
Amplification factor: 20
Max plate voltage: 2500 V
Max plate dissipation: 55 W

Published maximum ratings and characteristics promoted from the approved datasheet; mode-specific values preserved 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

193X Taylor Transmitting

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Filament Voltage
7.5 V
Nominal published value
Filament Current
3.25 A
Nominal published value
Maximum Operating Plate Voltage
2500 V
Class C oscillator / RF power-amplifier service where published
Maximum Plate Dissipation
55 W
Published maximum rating
Plate to Grid,
2.5 pF
Published direct interelectrode capacitance
Plate to Filament, mmf
7 pF
Published direct interelectrode capacitance

Characteristics

Plate Resistance
9000 ohm
Published general characteristic
Mutual Conductance
2200 µS
Published general characteristic
Amplification Factor
20
Published general characteristic

Data set 02

1940 Taylor Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Grid-plate capacitance
3.85 pF
Published general characteristics