Once you make a directional coupler, the results will be displayed with the measure led meters as a ratio SWR.
IC used in the scheme SWR meter is an LM3914, which are available on the market. Use non-inductive resistor (carbon-film or metal-oxide).
Complete set of SWR protection circuit schematic, see example image below to prototype soldering its components and the layout..
IC used in the scheme SWR meter is an LM3914, which are available on the market. Use non-inductive resistor (carbon-film or metal-oxide).
Complete set of SWR protection circuit schematic, see example image below to prototype soldering its components and the layout..
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