BR179

Forced-air-cooled Marconi transmitting triode for HF and VHF power service. With 8 kW plate dissipation and full ratings to about 100 MHz, it suits substantial communications and broadcast-frequency amplification.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.6 V / 90 A

Description

Forced-air-cooled transmitting triode for HF/VHF power 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: 6.6 V
Nominal heater current: 90 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: 0.01 S
Amplification factor: 28
Max plate voltage: 8500 V
Max plate dissipation: 8000 W
Max grid dissipation: 600 W
Max cathode current: 16 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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Filament Voltage
6.6 V
Filament Current
90 A
Amplification Factor
28
Transconductance
10000 uS

Other

Maximum Anode Voltage
8500 V
Maximum Anode Dissipation
8000 W
Maximum Grid Dissipation
600 W
Maximum/Peak Cathode Current
16 A
Frequency at Full Ratings
100 MHz

Capacitance

Anode-Grid Capacitance
32 pF
Anode-Cathode Capacitance
1 pF
Grid-Cathode Capacitance
33 pF

Construction

Cooling
Forced air