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Ok, so I am having an issue and before I go any further with pulling my hair out I figured I would ask everyone here. I finally set up my GR1225 repeater and was all excited to test it out. However, when I tested it, I found my range was only 1-2 blocks distance [about .23 of a mile. Going portable to portable at ground level I get at least half a mile range. The repeater is running 45 watts with a 15A power supply. I have a diamond u200 mounted about 15 feet up with an SWR of 1.3 on 467 and 1.7 on 462, flat pack duplexer which I purchased new and was "tuned" when they sent it to me, and 30 feet of LMR400. I have done some limited testing with equipment I have here. I know the GR1225 is not to blame as I swapped it out with a pair of m1225's set up as a repeater. They can run 15 watts and 35 watts, but no-matter the power setting, the range was exactly the same. So I know its further down the line. Feedline is not the issue. First tests were with RG-8X and later upgraded to LMR400 with no change to range, however my SWR went from 1.3 on both rx/tx freqs to 1.7 on TX, 1.3 on RX. I was told by family listening to the repeaters speaker that I was clear coming in, which makes me suspect the antenna, however SWR of 1.7 shouldn't result in that drastic loss of range but I could be wrong. That leaves the duplexer, which as I said was new and tuned before being shipped to me. I have no way of testing it myself so it would need to be sent to a shop. Im not sure which way to go first. If I replace the antenna Ill be getting a comet 712 so Im looking at $150 there, and I dont even know which shops can check and tune a duplexer, let alone how much they charge. I would rather fix the issue than keep guessing like I have been. Anyone have any ideas?