BR154

Industrial transmitting power triode intended for RF amplification, oscillation, or modulation. Manufacturer data emphasize substantial plate power, professional transmitter operation, and construction suited to continuous high-power service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 3.3 V / 11.5 A

Description

The Marconi BR154 is a indirectly heated forced-air-cooled transmitting triode for grounded-grid vhf 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: 3.3 V
Nominal heater current: 11.5 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

Triode

X-ray radiationInterelectrode capacitances

Amplification factor: 25
Max plate voltage: 1500 V
Max plate dissipation: 250 W

Highest published service maximums promoted; cooling and operating conditions preserved in parameters.

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

Other

Heater/filament voltage
3.3 V
Heater/filament current
11.5 A
Maximum plate voltage
1500 V
Maximum plate dissipation
250 W
Maximum frequency at full ratings
220 MHz
Minimum cathode heating time
2 min
Typical grounded-cathode plate voltage
1500 V
Typical grounded-cathode output power
290 W
Typical grounded-grid output power
325 W

Characteristic

Amplification factor
25

Capacitance

Grid-plate capacitance
10.3 pF
Plate-cathode capacitance
0.5 pF
Grid-cathode capacitance
2.6 pF

Construction

Cooling
Forced air