TH347

Forced-air-cooled ceramic-metal coaxial tetrode designed for linear television relay amplifiers. Its broadband power capability supports professional television retransmission.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 7.5 A

Description

Forced-air-cooled ceramic-metal coaxial tetrode for linear television relay amplifiers.

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: 6.3 V
Nominal heater current: 7.5 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

Tetrode

X-ray radiationInterelectrode capacitances

Max plate voltage: 4500 V
Max screen voltage: 650 V
Max plate dissipation: 4500 W
Max screen dissipation: 25 W
Max cathode current: 2.5 A

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

1972 Thomson CSF

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Operating Frequency
1000 MHz
Maximum Anode Voltage
4500 V
Maximum Anode Dissipation
4500 W
Maximum Screen/Grid 2 Voltage
650 V
Maximum Screen/Grid 2 Dissipation
25 W
Maximum/Peak Cathode Current
2.5 A
Typical Anode Voltage
3200 V
Class A TV translator
Typical Screen Voltage
600 V
Typical Anode Current
400 mA
Typical Gain
14 dB
Peak Video Power
400 W

Characteristic

Heater/Filament Voltage
6.3 V