The drive input is fed to an internal 4 way splitter which provides the PA module input drive. Each E2021 Power amplifieruses dual packaged MOSFET’s mounted on a substantial heatsink assembly with minimum airflow over RF components. DC power is fed to the RF modules from the 2 switched mode power supplies. Internal control and self protection in case of reverse power, excess current or over temperature is handled within each individual E2021 power amplifier module with all monitoring being microprocessor derived. Each module transmits its internal parameters to the central transmitter controller/monitor (E2023) and parameters are displayed on an easy to read backlit LCD screen. Outputs from the 4 Power modules are combined via a highly efficient 4 way common rail Wilkinson combiner. The combined RF output is then fed to the output coupler and harmonic filter.

Cooling Systems

Eddystone Broadcast low power transmitters have self contained redundant cooling fans mounted on the rear of the transmitter. This cooling system can be ducted if required and bespoke systems can be provided to meet special requirements.