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T20

Power transmitting triode intended for RF amplification, oscillation, modulation, or industrial RF service. Manufacturer documentation emphasizes professional radio-frequency operation and substantial power handling.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: UX4
Base pins: 4
Nominal heater: 7.5 V / 1.75 A

Description

General-purpose triode recommended as an amplifier through 60 MHz, with conservative ratings and low excitation requirements.

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: 1.75 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: 20
Max plate voltage: 750 V
Max plate dissipation: 20 W

Maximum/characteristic values promoted where clearly published on the source 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

1940 Taylor Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Grid-plate capacitance
5.05 pF
Published general characteristics
Grid-filament capacitance
4.85 pF
Published general characteristics
Plate-filament capacitance
0.65 pF
Published general characteristics