I have a new IC7300 and when using the antenna tuner I do not seem to be able to get my SWR to lower than 1.8 to 1 and need to use an external tuner to get it to 1 to 1, is this normal?? I used to have an IC761 and auto atu on that would tune any wire on any band to 1 to 1, so was expecting the same Alan ZL3KR