有没有用正V天线和GP天线做对比的，相同情况下差异大吗？

大啊。一个垂直极化一个水平极化

gp底噪略高，ft8远距离通联，，正v倒v ssb通国内没问题

@"BH9FPK"#p76351 GP底噪和端馈比呢，哪个更高，有的视频里面看到GP底噪高，有的视频里面又看到是端馈的底噪高。

@"BH9FPK"#p76351 我目前有一个GP天线，JPC12的天线现在确实有点底噪接收信号还好，不知道要不要再更新一个正V天线？目前的想法是搞个巴伦后再自己拼一个，效果应该还可以吧？

@"BG7NOD"#p76391 GP底噪肯定比端馈高。GP是全向天线，四面八方信号都进来了。端馈只收两个方向。

@"BI3AYR"#p76393 那估计我以前的端馈是方向刚好对着充电桩了，干扰几乎把频带全部淹没

@"BG7NOD"#p76397 也对，我刚刚说的不太严谨。端馈总有个方向底噪比GP低得多。

@"BG5EYK"#p76392 支持手搓，巴伦在某宝或者海鲜市场有很多，昨天推荐你买BH7JYR的1:1巴伦。关于正V底座，我买的是灰线科技的。拉杆天线就不用讲了吧，市场上到处都是。最后还需要一个支撑杆，直接买个灯架就行了。架设基本无问题。配件最好也准备一下，譬如固定帐篷的风绳，地钉，三组就够用了

@"bh1cqz"#p76401 BH7JYR 的 1:1 巴伦都可以通用了的？

@"bh1cqz"#p76401 还有个问题就是GP 天线要是在小区高层楼顶架设的话底部地锚用重物固定就可以？没有一定要插入到泥土里？还有哪些细节问题要注意的？

Comparison of Straight V antenna and GP antenna

BA7NNC-JOE

BG5EYK If it can be mounted vertically on the roof, that would be great. As for the ground-based antenna, I can set it up as you described, and it will likely perform better than my current method of using a fishing rod from my balcony.

BG5EYK

BA7NNC-JOE The way you fix a ground anchor seems pretty flexible, right? Does it necessarily have to be at a 90-degree angle vertically?

BA7NNC-JOE

BG5EYK Yes, I have watched M's video introduction and even used a tripod to support it; it works perfectly.

The vertical angle doesn't matter; I can use my fishing rod, which extends horizontally, just fine. The actual effectiveness will have to be determined through personal experience.

BG5EYK

BA7NNC-JOE Okay, I'm available to go and practice in person. That's how you really learn! Haha.

BA7NNC-JOE

BG5EYK Yes, on Bilibili, search for "Chengdu M," and you'll find many practical videos by him, including introductions to various antennas.

BH9FPK

BG7NOD End-feed, level adjustment, raising the feed by 10 meters will significantly improve the results.

BH6BAS

Each has its own advantages and cannot be directly compared. Different polarization methods and transmit angles. For low-frequency bands, dipole antennas are recommended; for high-frequency DX, GP antennas are suitable.

BH6BAS

Regarding end-fed antennas, they can also be used; they are a compromise solution that is convenient to install and covers multiple frequency bands.

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