各位大佬好，最近主要在楼顶临时架设玩短波，主要模式是FT8，设备是协谷G90N，目前感觉遇到一些瓶颈，想请教一下大家的经验。目前架设方案是：MA-01+相机三脚架+磁吸地网，吸附在楼顶的金属栏杆上。目前各个波段驻波比基本都可以保持在1.1左右，通过PSK reporter以及DXlook观察，发射情况尚可，可以叫到欧洲很多台，但是接收情况比较差。想请教各位，当前情况的瓶颈在于缩短的加感天线本身，或是在于GP天线的地网匹配不佳，还是非天线原因？如果需要升级天线，我有几个备选方案： 1. 全尺寸GP：MA-12或JPC-350 2. 正V：MA-50或JPC-7 个人而言，如果地网匹配不是主要原因，我更倾向于GP，架设更方便，也更容易收纳；如果加感不是主要原因，正V里面更倾向于JPC-7，因为他加感尺寸更小，全尺寸正V一侧就长达5.6m，非固定架设还需要拆装风绳，在楼顶也不太好操作。因此想问有没有大佬有使用相机三脚架架设全尺寸GP或正V天线的经验？抗风性和整体稳定性如何？以及针对我目前的情况，各位更推荐我往哪个方向升级？或者是否有其他类型适合楼顶临时架设的天线推荐？

GP的特性就是“嗓门大”，“耳朵不太好”，底噪也大，尤其是在城市中。如果可以，还是尽量架设倒V、正V等对称天线吧，且全尺寸肯定优于加感天线。如果环境允许，其实高波段便携八木也不错的，完全吊打上述所有天线。

在追求简单的前提下，有时候传播情况比天线本身更重要，如果只玩ft8，就这样的配置也可以，可能你需要的只是等风来～

@"BG5LU"#p97598 感谢大佬的建议，那我考虑一下试试正v天线吧，短波八木天线感觉体积太大了，我现有条件没法固定架设，来回拆装也不太方便，而且我也担心在楼顶固定不好会有安全问题

@"BG9OWJ"#p97607 突然发现咱俩是完全一样的设备😂，主要是感觉当前太阳周期已经进入下降期了，传播只会越来越差，再不趁着现在传播还可以的时期多玩一阵，就该有好几年玩不成短波了。

@"BD1CAZ"#p97621 有收到你的信号。我还鱼竿架设呢。想能正V就正v吧，在次点就GP。加感毕竟差点还有就是城市环境真不指望日常基本s9玩玩ft8。

@"BG5EQA"#p97623 是的，咱们通联过，还换过卡😄那我下一步换正v试试

@"BG6TA"#p97624 谢谢建议，打算换一套MA50试一下

环境不好尽量用低底噪天线吧。。试试正倒V

MA-01天线有点短，我现在的阳台是凹进楼体的，效果就不行，换了MA-12有很大改善，不过MA-12要接地网线，楼顶问题不大，阳台架设有一根地网线掉下去了没找到😭，现在是用MA-56座+5.6米拉杆固定在护栏，地网也是接到护栏上，再加一根风绳防止掉下去。楼顶上边风大，5.6米会有力矩，普通相机支架太轻会被吹倒，我已经废了一个相机支架，要那种重型的支架，底座大、有地面支撑的[upl-image-preview uuid=19098bab-dbfd-43c9-b14e-1f0290d7b988 url=https://storage.hamcq.cn/2026-06-14/1781449211-114107-20260614225802-87-26.png alt={TEXT?}]

Temporary installation of a shortwave antenna on the roof, G90N+MA-01 is transmitting well but receiving poorly. I am looking for suggestions on upgrading the antenna.

BD1CAZ

Hello everyone, I've been experimenting with shortwave communication from the rooftop recently, primarily using FT8 mode. My equipment is a XieGu G90N. I'm currently encountering some challenges and would appreciate your advice and experience.
The current setup is: MA-01 + camera tripod + magnetic ground net, attached to the metal railing on the roof. Currently, the SWR for all bands can be maintained around 1.1. Through PSK reporter and DXlook observation, the transmission situation is acceptable, allowing me to receive many European stations, but the reception quality is relatively poor.
I would like to ask for your input on the current situation. Is the bottleneck due to the short gain antenna itself, or is it due to poor ground plane matching with the GP antenna? Or is it caused by something other than the antenna? If I need to upgrade the antenna, I have a few options:

Full-size GP: MA-12 or JPC-350
Valid: MA-50 or JPC-7

Personally, if the ground net match isn't the primary reason, I would prefer a GP (Ground Personal), as it's easier to set up and store. If adding a canopy isn't the main consideration, I would lean towards the JPC-7, because its canopy is smaller; the full-size JPC-7 canopy extends up to 5.6m on one side, which requires disassembly of the guy ropes for non-fixed installations, and it can also be difficult to operate at the top of the building.
Therefore, I was wondering if anyone has experience setting up full-size GP or Vertical Polarity antennas on a camera tripod? What is the wind resistance and overall stability like? And, given my current situation, which direction would you recommend upgrading to? Or are there other types of antennas that are recommended for temporary installation on a rooftop?

BG5LU

The characteristic of a GP (General Purpose) microphone is its "large diaphragm," which means it has a relatively large surface area for capturing sound. However, this also makes it more susceptible to picking up unwanted noise, especially in urban environments. Additionally, the large diaphragm can contribute to higher background noise levels.
If possible, it's best to set up symmetrical antennas like inverted V and upright V antennas, and a full-sized antenna is definitely preferable to a gain antenna.
If conditions allow, a high-band portable Yagi antenna is actually quite good and outperforms all of the antennas mentioned above.

BD1CAZ

BG5LU Thank you for your suggestion. I'll consider trying a vertical dipole antenna instead. The Yagi-Uda antenna seems too large, and I don't have the space or ability to set it up properly. It would also be difficult to disassemble and reassemble frequently, and I'm concerned about potential safety issues if I mount it on the roof.

BG9OWJ

While aiming for simplicity, sometimes the communication situation itself is more important than the antenna. For example, with a configuration like this, if you only use FT8, it might be sufficient. Perhaps all you need to do is wait for the conditions to improve.

BD1CAZ

BG9OWJ I suddenly realized that we are completely identical devices.😂The main reason is that I feel that the current solar cycle is entering its decline phase, and propagation will only get worse. If I don't take advantage of this period when propagation is still good to play for a while, I won't be able to enjoy shortwave radio for many years.

BG5EQA

BD1CAZ I'm receiving your signal. I've also set up my fishing rod holder. I want to use the vertical polarization (V) mode, but it's not working properly. I'll try using the horizontal polarization (H) mode next time. Also, the urban environment makes it difficult to get good results; basic FT8 is fine for casual use.

BD1CAZ

BG5EQA Yes, we communicated via radio, and I also exchanged my card.😄Then I'll try switching to the genuine V next.

BG6TA

Please set up the temporary stand with the V-shaped handle.

BD1CAZ

BG6TA Thank you for the suggestion. I plan to try out a set of MA50 instead.

BG2EFX

If the environment is poor, try using a low-noise antenna. Also, try a straight V-shaped antenna.

BA7NXE

The MA-01 antenna is a bit too short. Since my balcony is recessed into the building, it doesn't work well. When I switched to the MA-12, there was a significant improvement. However, the MA-12 requires a ground wire, which isn't a problem on the roof. But one of the ground wires that was installed on the balcony fell and I couldn't find it.😭Currently, the MA-56 seat is fixed to the railing with a 5.6-meter puller, and the ground net is also attached to the railing, along with a wind rope to prevent it from falling. The wind at the top of the building is strong, and the 5.6-meter puller will generate significant force. Ordinary camera tripods are too light and can be blown over. I have already wasted one tripod, so I need a heavier one with a large base and ground support.

BD1CAZ

BA7NXE Thank you for the practical advice, it was very helpful! I plan to attach some heavy objects underneath the tripod to improve stability. Also, if I'm using the MA12, how do I securely mount it on the tripod?

BA7NXE

BD1CAZ The tripod I have comes with screws, which perfectly fit for securing the MA-12. [Taobao]https://e.tb.cn/h.8e1WGEDxrWN3vSU?tk=tJ3agwKc1Jb CZ225 "1.85m professional-grade tripod with hydraulic damping and pan/tilt function, fishing light, outdoor game console, and Gatling gun mount"

BA4QBK

Try using the lever to create a V shape temporarily.

BG5GDP

I used flower pots to create a ground-based staking system for my old house, and it has an efficiency of around 5.6. However, adjusting the frequency is quite complicated.

BG7NOD

The spread has slowed down, and fewer people are participating. It's a shame…

BI7ALG

BG7NOD When will the situation improve? Is it simply because it's hot and no one is participating?

BG7NOD

BI7ALG I guess we'll wait for the next cycle. There are no more beacons ahead, so we're preparing to enter the dark forest...

BG7NOD

A vertically polarized, all-directional antenna with high ground noise. Replacing it with a standard V-shaped antenna will significantly reduce the noise. Since your power output is already low, I recommend using a full-sized antenna. If you're operating in the 6-meter band with an "八木" (Yagi) antenna, its size isn't very large; the two arms extend to less than 3 meters, so even a three-element Yagi can be used. Or a 10-meter, two-element Yagi.

BH7HQT

For long-term use, it is recommended to install a GP (Grounding Point) on the lamp pole. It is also advisable to temporarily install a guy wire at the top of the pole. Of course, you can also hang heavy objects from the bottom of the lamp pole (tripod). If your terrace does not have height restrictions, I recommend using a combination of a 5.6-meter pull rope and a grounding mesh. The grounding mesh should be spread out on the roof according to the frequency band you are using. The standing wave can be adjusted to a very satisfactory level.
When receiving signals, it's not just the antenna that needs to be considered; you also need to consider the surrounding electromagnetic environment. Therefore, if the efficiency of a natural resonant antenna is still unsatisfactory, it is recommended to relocate and re-install the antenna.

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