v段，最低驻波在142了，144能用，147就1.9了。 u段，430和439都问题不大，435左右比较高，也就是波形中间凸起架设应该没问题，离彩钢顶有1米距离，6根原装地网。这天线到手时架在阳台上，一直以为是位置不好，现在换了山顶上，还是这样。还有救吗？ [upl-image-preview uuid=fb43589c-1dc1-4f1e-a9da-ce04d1c86905 url=https://storage.hamcq.cn/2026-01-06/1767668484-484276-img-20260106-105025.jpg alt={TEXT?}]

同款1.2m玻璃钢，感觉是你天线问题 [upl-image-preview uuid=b953c735-8745-49e4-a590-c1d5c035a084 url=https://storage.hamcq.cn/2026-01-06/1767672283-665550-img-20250111-181352.jpg alt={TEXT?}] [upl-image-preview uuid=ad3e3083-b793-4979-873d-93d790d9d104 url=https://storage.hamcq.cn/2026-01-06/1767672285-930800-img-20250111-181542.jpg alt={TEXT?}] [upl-image-preview uuid=3d528abf-9618-4b6b-a3aa-d4fe7ad32f3c url=https://storage.hamcq.cn/2026-01-06/1767672289-347404-img-20250112-120224.jpg alt={TEXT?}]

@"BH5UQJ"#p92584 您这个很好了

140-150 都在2.0以下有什么问题么？这就可以了

感觉没啥问题，试试拿掉下边那个地网，没准有惊喜

@"tudoubocai"#p92613 客气了，指标看着不错，但是架设条件有限，发挥不出最好的效果🤪

1.如果你用的是天分，并且测天线时用了馈线，那需要做校准。 2.驻波的最低点会受环境影响，所以你在一个日常环境中测得的驻波最低点，并不一定是天线的最低驻波频点，也不代表它的中心频点； 3.要结合驻波和阻抗来看天线的中心频点，一般阻抗越接近50时，就越接进中心频点； 4.最后再结合驻波功率计来看看实际发射结果，是不是接地不良引起的驻波偏高，或是环境原因。 5.最后一点，是我感觉和台子也有一定关系，台子发射的频率是否有轻微的偏移，发射杂散搞制的好不好，也会引起功率驻波计的测定结果。

@"BG2EFX"#p92622 2.0以下还能用吗？功率大了怕烧鸡啊

@"BI3QAC"#p92691 谢谢！有小天分和驻波表，两个能做对比。驻波表上能看到功率和频率。手台有几个，车台有一个25瓦的。应该能排除误差。今天接了欧讯的手台试差转，439上144下，4公里都能打开，感觉能正常用。先用着，等天气暖和了，拆了调一调😄

@"anger_young"#p92677 我试试看，之前的770h也发现，某些情况下，不用地网更好

@"BG2EFX"#p92622 没必要极致的追求SWR1.0 理论上他也不可能1.0 而且 SWR高的地方也不是你常用的频率实在觉得不靠谱把地网拆掉试试等你玩了短波你就发现了 2以下就够用~

Hua Hong 1.2-meter rod, V-segment offset to 142, is there any way to fix it?

tudoubocai

In segment 'v', the lowest resonant frequency is 142 Hz, 144 Hz can be used, and 147 Hz results in a value of 1.9.
Segment u: Both 430 and 439 are within acceptable ranges, while 435 is relatively high, indicating a peak in the waveform.
The installation should be fine; it's about 1 meter away from the corrugated iron roof, and there are 6 original ground wires. When I received the antenna, I set it up on the balcony, and I initially thought the location was bad. However, after moving it to the top of the hill, the problem persists.
Is there any hope?

BH5UQJ

The same 1.2m glass steel antenna seems to be causing issues. It might be a problem with your antenna.

tudoubocai

BH5UQJ That's great!

BH5UQJ

tudoubocai Thank you for your courtesy. The indicators look good, but the limited setup conditions prevent them from performing at their best.🤪

BG2EFX

Are there any issues with values between 140 and 150 that are below 2.0? This is acceptable.

tudoubocai

BG2EFX Can I still use it if the power output is below 2.0? I'm worried about burning the chicken.

BG2EFX

BG2EFX There's no need to strive for an SWR of 1.0 theoretically, and he also wouldn't be able to achieve it.
Also, if the SWR is high in a particular frequency range, it's likely not the frequency you normally use. I find this approach unreliable, so try removing the ground plane to see if that helps.
Once you've experimented with shortwave radio, you'll find that 2 watts is sufficient.

anger_young

It seems like everything is fine, so let's try removing that grounding wire at the bottom – maybe there will be a surprise!

tudoubocai

anger_young I'll try it out. I also found that in some cases, using only Wi-Fi isn't always the best option.

BI3QAC

1. If you are using a high-gain antenna and have used a feedline during calibration, then calibration is necessary.
2. The lowest point of the standing wave is affected by the environment, so the lowest standing wave frequency you measure in a typical environment does not necessarily represent the antenna's actual lowest standing wave frequency or its center frequency.
3. To determine the center frequency of an antenna, consider both standing wave and impedance. Generally, the closer the impedance is to 50 ohms, the more effectively it will resonate at the center frequency.
4. Finally, use a standing wave meter to check the actual transmission results and determine if the high standing wave is caused by poor grounding or environmental factors.
5. Finally, I believe that the condition of the antenna also plays a role. If the antenna transmits at a slightly different frequency, or if there are unwanted signals interfering with the transmission, this can affect the accuracy of the power standing wave meter readings.

tudoubocai

BI3QAC Thank you! I have a small antenna and a VNA (Vector Network Analyzer), which can be used for comparison. The VNA allows me to see the power and frequency. I also have a few handheld radios, and one car radio with a 25-watt output. This should help eliminate any errors.
I tested a Wouxun radio today, and it worked well. I was able to transmit on frequency 439 and receive on frequency 144, even at a distance of 4 kilometers. It seems like the radio is functioning normally.
Try it out first, and then adjust it once the weather gets warmer.😄

tudoubocai

BG2EFX I directly opened the tuning circuit, and the resonant frequency is now usable. The amateur band signals are generally below 1.5 kHz.

bg2qax

The 2-meter amateur radio with a frequency of 155 MHz, also uses "Not Yet Decided." I haven't heard of anyone using it to roast chickens.

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