F8146

General-purpose metal-ceramic water-cooled power triode for amplifier, oscillator, and Class B modulator service under continuous or pulsed conditions. Approximately 40 kW plate dissipation and 18 kV capability support very-high-power transmitters.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 11 V / 155 A

Description

General-purpose metal-and-ceramic power triode for amplifier, oscillator, or Class B modulator service under CW or pulsed conditions. F8146 is the 40 kW water-cooled variant.

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: 155 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: 18000 V
Max plate dissipation: 40000 W
Max grid dissipation: 800 W
Max cathode current: 8 A

Cooling: Water

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

Characteristic

Amplification factor
17

Capacitance

Grid-plate capacitance
53 pF
Grid-filament capacitance
58 pF
Plate-filament capacitance
3 pF

Other

Maximum CW plate voltage
11000 V
Maximum pulse plate voltage
18000 V
Maximum instantaneous peak plate voltage
20000 V
Maximum grid dissipation
800 W
Plate dissipation
40000 W
Maximum rated frequency
110 MHz
Pulse output power
1.6 MW

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

GridPlateCapacitance
53 pF
GridFilamentCapacitance
58 pF
PlateFilamentCapacitance
3 pF
FilamentStartingCurrent
500 A
FilamentColdResistance
0.008 ohm

Other

Maximum DC Plate Current
8 A
ClassC
Maximum DC Grid Voltage
-2000 V
ClassC
Maximum DC Grid Current
800 mA
ClassC
Maximum Plate Input
80 kW
ClassC