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Sorry but that is incorrect if you are using a tuner. Once you start getting to the point where that wire is >1⋌ then it generates lobes that have several dBi of gain as well as nulls that can be quite down. The higher you go aboe 1⋌ the more they increase in number.


You do have feeder losses because of SWR but those can be mitigated by using a balanced feeder or more ideally an antenna coupler at the feedpoint of the antenna.