BR194

Very-high-power forced-air-cooled Marconi transmitting triode. Approximately 40 kW plate dissipation, 15 kV plate capability, and very high peak-current capacity support severe professional RF service through the HF range.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 13 V / 240 A

Description

Forced-air-cooled transmitting triode for high-power HF amplifier and oscillator 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: 13 V
Nominal heater current: 240 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: 0.038 S
Amplification factor: 34
Max plate voltage: 15000 V
Max plate dissipation: 40000 W
Max grid dissipation: 1800 W
Max cathode current: 100 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
13 V
Filament Current
240 A
Amplification Factor
34
Transconductance
38000 uS

Other

Maximum Anode Voltage
15000 V
Maximum Anode Dissipation
40000 W
Maximum Grid Dissipation
1800 W
Maximum/Peak Cathode Current
100 A
Frequency at Full Ratings
25 MHz

Capacitance

Anode-Grid Capacitance
60 pF
Anode-Cathode Capacitance
1.5 pF
Grid-Cathode Capacitance
95 pF

Construction

Cooling
Forced air