Trying to build a simple SWR / RF Power meter. I am using a dual directional coupler that supplies a voltage relative to the RF power. My problem is it is not liner... ( I thought it would be :blush: ) This is what I get... 100 watts = 2.82 volts 10 watts = 0.891 volts 1 watt = 0.281 volts My q…

Calculating SWR with RF directional couplers

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