PJ21

General Electric high-vacuum Pliotron power triode for amplification and relay applications. Published linear operation provides about 1.7 W output at 5% second-harmonic distortion from a 350 V plate supply.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B4B
Base pins: -
Nominal heater: 4.5 V / 1.1 A

Description

High-vacuum Pliotron triode for amplification and relay applications.

Socket description

Medium 4-pin bayonet

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B4B
Base pins: -
Nominal heater voltage: 4.5 V
Nominal heater current: 1.1 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: 0.00095 S
Amplification factor: 3
Max plate voltage: 350 V
Max plate dissipation: 7.5 W
Max cathode current: 195 mA

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

Characteristic

Filament voltage cciuerieeno
45 V
Published datasheet value; semantic OCR text extraction.
Filament current veve
1.1 A
Published datasheet value; semantic OCR text extraction.
Grid voltage . . e —
83 V
Published datasheet value; semantic OCR text extraction.
Grid-plate transconductance
950 uS
Published datasheet value; semantic OCR text extraction.

Other

D-c plate voltage . 350
350 V
Published datasheet value; semantic OCR text extraction.
Plate dissipation . . . e
7.5 W
Published datasheet value; semantic OCR text extraction.
D-cplatecurrent. . e i
195 mA
Published datasheet value; semantic OCR text extraction.
Plate power output, 5% second harmonic
1.7 W
Published datasheet value; semantic OCR text extraction.