4. Coupling amplifier modules
High-power solid-state transmitters require the coupling of a large number of amplifier modules (up to 256 modules) to satisfy the different output power levels of the amplifier blocks. The three types of coupling widely used: series coupling, parallel coupling and mixed series-parallel coupling are briefly described below.
4.1 Series coupling
Series coupling, shown in figure 14 , is already widely used in lower-power solid-state transmitters, mainly in the medium-wave range, but also in VLF (Very Low Frequency).
The outputs of the amplifier modules are all connected in series to the secondaries of the output transformers. The total output...
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Coupling amplifier modules
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