马上就考B证了，因为经验及预算有限，在天线这里有些疑惑，还请有经验的友台提出参考意见。住在1楼，而且周围高层较多而且充电棚也特别多，在楼底拉天线基本不可能了。基于这点，所以未来以野架为主要方式。目前考虑是在GP和端馈中二选一，比较下来端馈似天线乎更方便，但不太了解端馈天线在性能上和GP天线的优劣，因此比较纠结。此外还有两个其他问题 1.居住地附近的野架候选地部分区域有高压输电线，对通联会有影响吗？如果有影响，最好远离多少距离？ 2.G90N的天线接口是什么口？选馈线的时候没找到一样名字的。

为什么要选，两套都备上，两套大概就两三百元

@"BG7MGW"#p100438 成年人不做选择😀

[upl-image-preview uuid=e8a8c1d8-eaa5-4d8f-986c-f60534e62c2d url=https://storage.hamcq.cn/2026-07-31/1785491697-87807-tmp_08b3ddcbf7cb0362d5d3495de1c7f0838461d626fb64c000.jpg alt={TEXT?}] 如图，G90N机身上的天线接口是SL16-K型接口，也就是M母头，馈线这一端买M公头就可以了

选GP！等对GP的特点、短波的传播都搞清楚了，可以换端馈体验一下。刚接触短波最好不要考虑端馈。效率低，然后玩FT8需要接上地线，不然共模电流干扰严重，架设高度过低又会导致方向性难以预测，一般架设高度需要大于λ/4（应该是这个数值），当然随便拉一根端馈也不是不能玩，只是玩的爽不爽。GP的好处是，架设方便，找个开阔的地方，只要传播可以，FT8,10W通南美也很丝滑。

@"BG7MGW"#p100438 gp不便宜啊，成都M哥的我看也要接近600了

@"freedom_liao"#p100676 底座七八十，拉杆五十，地网、地插加起来不超过30，一套下来也就150元左右。

Shortwave antenna selection

BA4SLE

I'm about to take the B license exam, but due to limited experience and budget, I have some doubts regarding antennas. I would appreciate any advice from experienced ham radio operators.
I live on the ground floor, and there are many high-rise buildings nearby with numerous charging stations. It's practically impossible to install an antenna on the ground floor due to this. Therefore, I plan to use a pole mount as my primary method. Currently, I am considering either GP or direct feed, but I find that direct feed seems more convenient, although I don't fully understand the performance differences between direct feed and GP antennas. This is causing me some hesitation.
Additionally, there are two other issues.
1. Are there high-voltage power lines in the area near the proposed location for the residential development, and if so, what impact would this have on communication? If there is an impact, what distance should the development be located from these lines?
2. What type of connector does the G90N antenna use? I couldn't find a matching connector when selecting the feedline.

BG8QDD

BA4SLE GP天线是垂直极化，而且不需要较高的架设高度就有低仰角，辐射强度在水平上是全向的，但底噪偏高
端馈没了解过
还有正V，正V天线有一定方向性，理论来说如果你的目标是欧美地区，那么推荐架设高度为7米（天线馈电点到地面的垂直距离），这显然比较难做到，但仅仅是理论
另外，我的一个爱好者朋友告诉我其实4.8米左右就可以，因为在实际使用上差别不大，但我没有验证过，他的目标也只是国内爱好者
GP天线制作难度不高，可以尝试自制，成本也不高，但需要天分或网分（不过这东西玩短波都应该有）

BG7MGW

Why choose two sets? It's best to have both, as two sets would likely cost around 200-300 yuan.

BG5NKC

BG7MGW Adults do not make choices.😀

freedom_liao

BG7MGW GP isn't cheap either; I saw that Chengdu M's cost around $600.

BD1CAZ

As shown in the figure, the antenna interface on the G90N unit is an SL16-K type interface, which means it has a female M connector. You can purchase a male M connector for the other end to connect the cable.

BA4SLE

BD1CAZ Okay, thank you.

BI7ALG

You should also consider using a verified account.

BG5GDP

Is this a homemade Yagi antenna?

mentha

Choose GP! Once you understand the characteristics of GP and how shortwave signals propagate, you can try using a feedline. When first getting started with shortwave, it's best not to consider using a feedline. It's inefficient, and FT8 requires a ground connection; otherwise, common-mode currents will cause interference. Also, if the antenna height is too low, directional prediction becomes difficult. Generally, the antenna height should be greater than λ/4 (this is the value). Of course, you can still use a feedline, but it's just a matter of whether it's enjoyable or not. The advantage of GP is that it's easy to set up; find an open area where propagation is good, and FT8 and 10W can easily reach South America.

BI7ALG

freedom_liao The base costs around 70-80 yuan, the pull handle costs around 50 yuan, and the net and stakes together cost no more than 30 yuan. So, a complete set would cost approximately 150 yuan.

BG4IJK

freedom_liao Buying individual parts is cheaper. You'll need a 5.6-meter pull rope, a base, a ground wire, and a feeder cable. The ground wire can be made from ordinary electrical wire. As long as you can assemble everything, that's all you need.

BG7MGW

freedom_liao Buying M's kit is definitely expensive. If you want to save money, you can make it yourself. The waterproof box costs a few dollars each, and the M10 long six-sided nuts cost a few dollars. The base also costs a few dollars. You can buy a finished base from some online platforms for 40-50 yuan, and a 5.6 pull-out antenna costs over 50 yuan. You can buy a ground wire yourself, either by tearing open the cable or using a free cable – the ground stakes also cost a few dollars.

BI7ALG

BG7NOD

Both end-to-end and GP are lightweight, so you can carry both. Then, depending on your specific needs, choose whichever one to deploy.

ba7ck

To achieve excellent DX, only the Yagi antenna is reliable; others are basically just for show.

BG7NOD

ba7ck An eight-element Yagi antenna also needs to have a certain height in order to be effective.

CQ-BG8LTU

Search on Haikou for Harbin China Unicom Castle.
GP base with 5 ground wires and 60 ground stakes, free shipping.
You can then buy a handle to use it with.

BA4SLE

In conclusion, both the end-to-end and GP systems have been acquired. Thank you for your helpful suggestions. I look forward to taking the exam at the end of the month and hope to meet everyone again in the air. 73

bg5iyz

BA4SLE 新B证只有15w 虽说功率不是至上现在通联环境底噪又大不用怀疑郊区一样的再上gp或端馈叠加没经验很可能你能听到别人别人听不到你容易劝退 cw ft8可能还行 ssb 建议上4.8米或7米灯架自制正v 或八木

BG8KUQ

GP bought a 5.6-meter pull rope and got it mixed up, which was very simple. It requires no technical skills.

YofoaStudio

Ease of installation is a priority.
First, enjoy playing with the original controller until you're satisfied. Then, if you still want more, switch to a better one.

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