BI1JNP 两年前我架设了正V750天线，巨大的支撑和稳定系统让我伺候起来感觉力不从心，每次都需要至少三个人才能勉强施工，由于我选用的是7.25米的铝制插接杆，大风天气天线在上面有很大的转动幅度，虽然1区的大神级人物BG1HGS刘老师帮我弄得非常结实，没有任何倒下的可能，但我还是决定结束这种担惊受怕的生活。 经过询问其他大佬的意见和自身条件的权衡，我选择了维护上较为简单的GP天线。一开始选择的某款GP天线非常不尽如人意，在这期间也听到GP天线不行底噪高什么也听不见等等说法，让我非常懊恼，因为GP天线的名声本身就很差。后来知名摩机专家BH1RQN老师首先进行了实践，带领我做出了大胆尝试。我们判断GP天线的效率不存在问题，出现问题只是因为我们采用的第一型天线设计缺陷问题导致的。 于是我们决定直接购买GP天线的几乎最顶级，即9波段美制AV680天线，也是我们对GP天线的最后尝试。之后我们紧锣密鼓的准备采购，又突然了解到九波段的AV680和八波段的AV640在国内有替代品，在进行了全面的了解之后，我们决定采用国产的改进型号。我一直称G9为AV680的改进型号而不是仿制型号，这是因为国内大神仿制这款天线时候对材料和设计都进行了优化，让这个仿制型号要优于原始型号。 首先讲解一下基本技术参数，天线高九米多，架设完毕约十米。九个波段（80米、40米、30米、20米、17米、15米、12米、10米、6米）不会受到多个线圈或陷波器的衰减，其中80米40米30米20米需要通过法杖部分的线圈，15米主要使用主梁，效果最佳。其余波段都是单独的附加振子。 线圈部分（法杖部分）可以看到每个线圈之间的短接跳线，低波段直接通过跳线而不是通过其他波段线圈，大大减少了衰减和不良影响。 架设由两个人可以简单完成，一个人完成也不是不可以，但是不建议。这里推荐工程脚手架转轴，直接固定在底座上，只需要一个人就可以简单的把天线推起来，另一个人固定即可完成架设，对比正V750动辄三五个人要简单太多了。 整体造型非常漂亮且低调。天线效率很高，由于GP天线的发射能力，在追台中不输给那些铁塔八木。下面是我的地图供各位参考
BI3PIE Great job! I was struggling with developing a strategy for updating my rooftop shortwave antenna system, and this has given me some new ideas. However, I'm still unsure about its wind resistance performance.
BI1JNP BI3PIE According to the author, it can withstand wind speeds of up to 12 levels, but if not pulled, it will only withstand 10 levels, provided that the base is strong enough.
BI1JNP BG8KUQ Considering that this design allows for operation across nine frequency bands, it represents the optimal solution.
YofoaStudio There are quite a few antennas in this area. It seems that community work should be very well-suited for implementation. Admiring the original poster's assumed environment.
BH4FCY Could you please clarify whether the antenna is a 3/8 wavelength antenna? Based on the image, it appears to be a crane with a lifting height of 1 meter? Is it a hard-surface network? I also think it's a good fit for my installation environment.
BI1JNP BH4FCY It seems to be around 5/8, with a support at 1.5 meters; including the base, it might be about 1.7 meters.
BI1JNP BH4FCY I got the wrong length. I just checked with the antenna maker and they confirmed it's 3/8.
BI1JNP SuoYuC If the environment allows for a high return on investment in antennas, it is much more important than a good radio station.
SuoYuC BI1JNP However, the environment was terrible, so I decided to give up fishing and go somewhere else.
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