From what I have read over the years the swr meter should be at 3 different places, lol. I have read at the radio to read whats happening back to it, after an amplfier, and the last at the end of the coax by the antenna itself. I have the radio and 15.2ft of LMR400UF coax going to an amp and then another 15.2ft coax going to the antenna. It is direct wired at the antenna which is a puck mount. I do not have a good meter like an mfj and have been tuning the antenna with the amp inline and off, the channel 1 and 40 match way with the meter close to the radio(4in jumper). This is the way I have seen all over and the most of, but also have seen the other two ways mentioned. Where would the best place be for the swr meter to tune the antenna with an amp inline?