D1027A

General-purpose metal-ceramic high-power triode for CW or pulsed RF amplification, oscillation, and Class B modulation. Rated around 60 kW plate dissipation, with published Class C operation reaching roughly 72 kW RF output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 11 V / 210 A

Description

General-purpose metal-ceramic water/forced-air power triode for CW or pulsed amplifier, oscillator and Class-B modulator service.

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: 11 V
Nominal heater current: 210 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: 17
Max plate voltage: 14000 V
Max plate dissipation: 60000 W

Applicable promoted fields mapped semantically from the printed ratings; device-specific electrical limits and operating conditions are preserved densely in TUBE_SECTION_PARAMETER.

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

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Filament Starting Current
800 A
Filament Heating Time Minimum
15 s
Grid-Plate Capacitance
65 pF
Grid-Filament Capacitance
90 pF
Plate-Filament Capacitance
5.5 pF
RF Plate Voltage
10000 V
ClassC
RF Plate Voltage
12500 V
ClassC
RF Output Power
72 kW
ClassC
Frequency Maximum
110 MHz
ReducedRating