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Power - Beam (NOT sweep) ·BeamPower-BeamPower

C144

Twin beam tetrode designed for push-pull high-frequency power amplification, with operation extending to approximately 200 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: -
Nominal heater: 12.6 V / 1.125 A

Description

Twin beam tetrode for push-pull HF power amplification.

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: 12.6 V
Nominal heater current: 1.125 A
Parallel heater voltage: 6.3 V
Parallel heater current: 2.25 A
Series capable: Yes

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Transconductance: 0.009 S
Max plate voltage: 750 V
Max screen voltage: 225 V
Max plate dissipation: 20 W

Section 2

Beam Power

X-ray radiationInterelectrode capacitances

Transconductance: 0.009 S
Max plate voltage: 750 V
Max screen voltage: 225 V
Max plate dissipation: 20 W

Second identical physical beam-power section; added to align rows with SectionCount.

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

Heater Voltage Series
12.6 V
Both sections
Heater Current Series
1.125 A
Both sections
Heater Voltage Parallel
6.3 V
Both sections
Heater Current Parallel
2.25 A
Both sections
Transconductance
9000 uS
Per section

Other

Maximum Anode Voltage
750 V
Per section
Maximum Screen Voltage
225 V
Per section
Maximum Anode Dissipation
20 W
Per section
Maximum Frequency
200 MHz

Capacitance

Grid-Anode Capacitance
0.12 pF
Per section
Input Capacitance
14.5 pF
Output Capacitance
7 pF
Screen Bypass Capacitance
65 pF