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comparing the icom ic-718 to the yaesu ft-1000mp mark v field and ft-840.on the lw band the ic-718 is better than the mark v field and ft-840 as far as sensitivity and imd.on the mf band the ic-718 is much better than the mark v field and better than ft-840 as far as sensitivity and imd.on sw including the ham bands it's tied with the ft-840 and down a smidge with the mark v field as far as sensitivity and imd. on the lf, mf and sw bands the ic-718 is slightly better than the icom r-75 receiver as far as sensitivity and imd.美国人对icom 718的评价不错
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经常看到站内的爱好者拿什么得劲1103之类收音机与正规的发射机相提并论,说事:什么经过实测,接收效果不如普通的收音机。其实,要知道光看现象不看本质,其结论总是本末倒置的。因为发射机需要在几个有限线的业余频段范围内工作,因此设计的时候,无论从天线(需要谐振),带通滤波器、输入调调谐回路,高频中频电路等等,只需要将频率范围落入业余频段内就可,带外的发射、接收衰减的越大越好,起码需要60-70db以上(这个指标是指发射时),这样带外的干扰才能做到最小,否则属于不合格产品(这与专业机不同)。发射是这样,接收同样基本上是同样的回路。因此,不管短波电台从短波到50mhz,甚至到70cm,输入频率多么宽,其接收就是给你玩玩得,不愿qso时当收音机听听而已,只有带内的发射、接收指标才能保证!千万别说电台的接收效果不如普通的民用收音机,这样的玩笑,错误太低级了。
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7m比抗干扰性,21m比灵敏度
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