I am looking for schematics for a standalone SWR protection circuit. Most seem to just compare REV power to a fixed input voltage to a comparator. I want a circuit that works at all power levels, so it has to compare the relative levels of FWD to REV voltages. As by illustration say I am running 1 Watt QRP. A high reflected power may be a tiny voltage out of the bridge compared to a safe REV level when running 1kW. I am sure someone has addressed this before and built SWR protection that looks at the relativity between FWD and REF voltage levels, but I can't find much, and the one I have found is hand written and illegible, unfortunately. Please bear in mind I am a beginner so I need real schematics and not general ideas to create my own Wink It may be easy peasy to you, but I need to build to a known working schematic at my level, although I do try and understand what's occurring! I have the bridge built and working.
Thanks for reading.