BI4MKU 为了更方便地进行卫星通联，前段时间，我将U5V3的八木天线出掉，升级购入了U7V4。然而，我发现，U7V4并不如U5V3方便，这是为何？请往下看。 这是我的三脚架，搭配了一个三维云台，在打卫星这方面，我感觉三维云台要比球形云台方便，更稳，更易操作。 这是pdd购买的固定夹，底部带有1/4螺孔，可以固定在云台的快装板上，夹具可以夹住八木天线。这个夹具物美价廉，应该比3D打印的固定夹便宜吧，隆重推荐给有需要的ham。 这是U7V4固定在三脚架上的样子。但是，有一个问题，如下图。 U7V4的U段振子在垂直面，当天线仰角过大时，会和三脚架冲突，即使升高三脚架的中轴，也还是不行。 因此，我想到了一个办法，用几个简单的配件，将八木天线的中轴偏移出去，配件如下图。 1根与八木天线差不多长度的dn25 PVC管，2个蟹钳夹。另外有1个手机支架，固定在PVC管上。 以上就是我的解决方案，即使仰角接近90度，也依然不会冲突，把手机固定在PVC管上，也节省了八木天线的主轴空间。 需要确保八木天线的主轴、PVC管、手机主轴这3条线平行，这样才能精确跟踪卫星。 这些配件会不会影响天线的发射和接收效果？大家还有什么更好的方案吗？
y010204025 Hey, I wish you had sent it earlier. I've been looking for one for a while, and I finally found one that was 3D printed. It's a bit small in size, and I'm still hesitant to use it because I'm worried about breaking it.
BG7MGW After using one crab claw to hold, add some weight behind it to balance the head and tail, and that's all you need. It doesn't have to be so complicated.
CQ-BG8LTU I previously used a crab claw to hold the Yagi antenna in the middle, and when I called out, my signal had significant noise. After switching to the tail end, the noise disappeared. I'm not sure if it's because the "蜗" crab pincer is made of metal.
BG4KPJ CQ-BG8LTU This is due to the metal crab claw, which effectively adds a resonator in between two systems, changing the resonant frequency.
y010204025 BI4MKU That's great! My tripod has a pan and tilt head, allowing for 360-degree rotation and 90-degree tilting. That's exactly what I need. The other axis provides approximately 30 degrees of adjustment, which is more than enough.
BI7BKE Wow, I've been struggling with this problem for a long time... My friends all told me to sell my eight-eyed creature. I've learned about it. Please install U5V3 on my car when I get home.
BD1DHZ Thank you for sharing, the clamp is really convenient, especially for attaching a phone mount and using it with star tracking. The forum has even more interesting content!
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