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Several months ago I had a temporary U/VHF base antenna.
It was a MFJ-1729 dual band mag mount stuck to a radial plate on a 30' mast. I was feeding it with about 36' of RG58 that was made up of 3 sections, joined with SO-239 barrels. I thought it was working great because I could hear a friend on the input to a repeater some 50 miles away (he lives very close to the repeater). I improved the antenna with a mono band vertical, better coax & more mast. My math says I gained 10' in altitude and 2.7 db overall (factoring in new coax & better antenna). All of a sudden my new, better & higher antenna could NOT hear my friend! WTF? I figured it was a band opening and forgot about it..... Last week the ice storms caused a branch to fall, ruining my antenna. Due to $$$ shortage (replacing my HF rig), I opted to go back to the temporary setup. The tip of the antenna is 10' lower and overall gain is 2.7db less. I can hear my friend again! I don't get it - the premium antenna worked better except for hearing my friend, where it worked worse. Anyone care to offer an explanation? Ken KG0WX |