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10m ground wave expectations
Joey wrote:
Hi, I'm trying to determine if I could use 10 meters to contact a station about 75 miles away with about 2500ft elevation of a couple sets of hills in between with just simple antennas on either end. Perhaps a 10m dipole on one end and some kind of stealthy one on the other. I assume this would have to be ground wave only given the distance and current band conditions. My parents are both techs so we're currrently limited to parts of 10m as the lowest band and I'd like to have something reliable without need repeaters for disaster comms. We actually only have a few single hop VHF/UHF repeaters between us, though quite a few linked ones. I've also thought of 6m due to smaller antenna requirements, but I'm pretty sure this is too far... Thanks! Just off-hand, I would suspect for reliable and consistent communications a three element yagi and ~100 watts on each end would result in enjoyable rag chews ... same for 6m. Height? More the better. Seventy-five miles on omni antennas is very chancy, in my humble opinion. But then, power/height would be the main variables, enough height and power would certainly help. Regards, JS |
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