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Power - Triode (over 1000V 100W) ·Triode

HD203A

Taylor heavy-duty general-purpose transmitting triode with a floating carbon anode for RF amplification, oscillation, and Class B audio modulation. Rated for approximately 150 W plate dissipation and 2 kV plate operation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
JUMBO4B
Base pins
4
Nominal heater
10 V / 4 A

Description

Heavy-duty general-purpose transmitting triode with a floating carbon anode, intended as an oscillator, RF amplifier, and Class B audio modulator.

Socket description

Super Jumbo 4-pin bayonet

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
JUMBO4B
Base pins
4
Nominal heater voltage
10 V
Nominal heater current
4 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
5600 Ω
Transconductance
0.004464285714285714 S
Amplification factor
25
Max plate voltage
2000 V
Max plate dissipation
150 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

    4 A

    Nominal published value

  • Maximum Operating Plate Voltage

    2000 V

    Class C oscillator / RF power-amplifier service where published

  • Maximum Plate Dissipation

    150 W

    Published maximum rating

  • Plate to Grid, mmf

    12 pF

    Published direct interelectrode capacitance

  • Plate to Filament, mmf

    5 pF

    Published direct interelectrode capacitance

Characteristics

  • Plate Resistance

    5600 ohm

    Published general characteristic

  • Amplification Factor

    25

    Published general characteristic