FP146

Thoriated-tungsten pliotron designed for Class B audio-frequency and RF power-amplifier service. It combines high amplification factor around 78 with 125 W plate dissipation and approximately 125 W published Class B output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 10 V / 3.25 A

Description

The FP146 is a three-electrode thoriated-tungsten pliotron for Class B audio-frequency and radio-frequency power-amplifier 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: 10 V
Nominal heater current: 3.25 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: 20000 Ω
Transconductance: 0.0039 S
Amplification factor: 78
Max plate voltage: 1500 V
Max plate dissipation: 125 W
Max cathode current: 160 mA

Page 1 ratings/characteristics visually verified.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Plate-to-Grid Capacitance
9.2 pF
Grid-to-Filament Capacitance
7.2 pF
Plate-to-Filament Capacitance
3.9 pF

Other

Plate Voltage
1250 V
ClassB Audio
Plate Current Maximum Signal
160 mA
ClassB Audio
Plate Input Maximum Signal
200 W
ClassB Audio
Power Output Maximum Signal
125 W
ClassB Audio