TA20250

Water-cooled ultra-high-power transmitting triode for Class B and Class C RF service. Approximately 130 kW plate dissipation, 20 kV capability, and enormous filament current support major broadcast and communications transmitters.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 35 V / 420 A

Description

TA20250 is a water-cooled ultra-high-power transmitting triode for rf class b/c service. The supplied Philips datasheet was read for filament data, limiting ratings, characteristic constants, operating classes, cooling requirements, and interelectrode capacitances where published.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 35 V
Nominal heater current: 420 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: 0.025 S
Amplification factor: 45
Max plate voltage: 20000 V
Max plate dissipation: 130000 W

Water-cooled ultra-high-power transmitting triode for RF Class B/C service

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

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum plate voltage Class C unmodulated
20000 V
ClassC
Maximum plate voltage Class C anode-modulated
15000 V
ClassC

Characteristic

Filament current
420 A