Barrett 4075 High Power HF Transmitter

The Barrett 4075 high power HF Transmitter is a compact rack mounted communications solution developed for base station applications in large HF networks. It can be supplied in 1kW and 500 W versions.

The transmitter comes as a complete package with an exciter, power supply, liquid cooled linear power amplifier, interconnecting cables and all required rack mount hardware.

The 4075 linear amplifier is designed and engineered for modern communications which are heavily data orientated, requiring the equipment to work at high duty cycles for extended periods of time. The unique liquid cooled design increases efficiency resulting in less system deterioration due to overheating in the power stages, extending overall equipment service life. The amplifier provides continuous duty cycle (100%) at 1kW.

The Barrett 4075 amplifier natively supports the Barrett 4050 Transceiver/Exciter which when coupled requires no further tuning or adjustment. A flexible I/O interface and analogue ALC feedback provide the transceiver/exciter full control over final output power.

Some features the 4050 HF SDR provides to the 4075 High power transmitter are:

– 1.6 – 30 MHz continuous coverage
– Remote control via IP and WiFi
– Compatible with existing 4 & 6 digital selective calling radio networks
– 2G & 3G Automatic Link Establishment (ALE) options
– ARINC ICAO Annex 10 Aeronautical Selcall option

The 4075 system is field re-programmable via USB allowing the end user to update system software.

An on-board micro SD card provides enhanced flexibility for system language, display customisation and event logging. Customisable auxiliary ports are also available for enhanced system control.

Intelligent electronic controls protect the 4075 from input and output overload while providing a sophisticated early warning and a diagnostic interface for system monitoring and event logging.


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