In message , billcalley writes
We are all told that VSWR doesn't matter when using low loss
>transmission lines, since the RF energy will travel from the
>transmitter up to the mismatched antenna, where a certain amount of
>this RF energy will reflect back towards the transmitter; after which
>the RF will then reflect back up to the antenna -- where the energy is
>eventually radiated after bouncing back and forth between the
>transmitter and antenna. I understand the concept, but what I don't
>quite understand is why the reflected RF energy isn't simply absorbed
>by the 50 ohm output of the transmitter after the first reflection?
>For the RF to bounce back and forth, wouldn't the transmitter's
>impedance have to be very, very high (or low) when the reflected RF
>energy hit its output stages? I know I'm missing something vital
>here...
It matters when it changes suddenly, like mine did recently on my 70MHz beam, when one of the elements came off in a gale.
Brian GM4DIJ