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Tube Tinker — Electron Tube Database
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Power - Triode ·Triode

203B

Taylor transmitting power triode closely related to the 203-Z, but with amplification factor about 25 and the plate lead brought through the base. Published ratings cover Class C oscillator and RF power-amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
UX4
Base pins
4
Nominal heater
10 V / 3.85 A

Description

Taylor 203-B has the same characteristics as the 203-Z except for an amplification factor of 25, with the plate lead brought through the base.

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
10 V
Nominal heater current
3.85 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
6000 Ω
Transconductance
0.0048 S
Amplification factor
25
Max plate voltage
1000 V
Max plate dissipation
50 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

    10 V

    Nominal published value

  • Filament Current

    3.85 A

    Nominal published value

  • Maximum Operating Plate Voltage

    1000 V

    Class C oscillator / RF power-amplifier service where published

  • Maximum Plate Dissipation

    50 W

    Published maximum rating

  • Grid to Filament, mmf

    6 pF

    Published direct interelectrode capacitance

  • Plate to Filament, mmf

    5 pF

    Published direct interelectrode capacitance

Characteristics

  • Plate Resistance

    6000 ohm

    Published general characteristic

  • Mutual Conductance

    4800 µS

    Published general characteristic

  • Amplification Factor

    25

    Published general characteristic