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You can find all the specs and features if you do a google search. About five years ago I bought both radios new. Icom left some things out of the 718 that Yaesu included in the 450. A month later I sold the 718 and kept the 450AT. I know people like the 718 and it's an ok rig but there wasn't any doubt for me which to keep after using them side by side.
Coax question. I just put up a new Sirio monsoon base antenna with 100’ of rg8u coax testing with myMFJ antenna analyzer shows 1.4 swr at 26.965mhz and a 1.1 at 27.405 mhz . When I checked the ohms it’s steady a 30 ohms across the entire bandwidth.
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