以拉杆gp打比方，能不能把拉杆全拉出，然后在电台上收听各频段，听听哪边人多，在调整拉杆长度到对应频段？天线不协振对收听有影响吗。

野外，，要么用固定频点的天线，，比如端馈，全尺寸倒v，gp4，要用拉杆还要多波段，准备天分或者驻波表，，这就是我一直没入手拉杆gp的原因另外你说的收听，，随便辣根电线也能听

掌握经验公式，1/4倍的工作频段波长乘以0.9即为大概拉杆拉伸的长度。这里工作频率波长就是平常经常说的40/20/10之类的大概数字就可以不用很精确，拉好之后发射一下看电台驻波差多少，一般不会差很多，然后简单调两三次即可。无需驻波表和天分。

@"BH9FPK"#p35576 可能我没描述清楚，驻波我会调的，我的意思是要先确定好哪个波段有传播才能玩呀。比如说拉杆我先拉到7m，然后跑去电台端看信号多不多；然后如果不多，又跑去天线，拉到14m的位置，然后再跑去电台看信号。这样来回跑很麻烦，我的意思是能不能我就把拉杆全部拉开，这样能看到全部波段的型号吗？会不会比如我全部拉开，某个波段的传播，我收不到？

@"BG2KAJ"#p35587 可能我没描述清楚，驻波我会调的，我的意思是要先确定好哪个波段有传播才能玩呀。比如说拉杆我先拉到7m，然后跑去电台端看信号多不多；然后如果不多，又跑去天线，拉到14m的位置，然后再跑去电台看信号。这样来回跑很麻烦，我的意思是能不能我就把拉杆全部拉开，这样能看到全部波段的型号吗？会不会比如我全部拉开，某个波段的传播，我收不到呢？

@"BOBAFETT"#p35573 最方便的就是带一根多波段的天线，这样你就不用来回拉；当然你也可以根据当天传播情况以及野架的时间和计划，选择性的在某个频段开展通联活动。这样你就不会来回的或者频繁的调整天线。

@"BOBAFETT"#p35612 可以的，不谐振也能抄收啦，FT8也能收看得到信号

GP天线，最好备台天分。

@"BOBAFETT"#p35611 各波段传播规律，，大概早上晚上 7mhz。。大中午传播不咋地，其他时间 14-21.。

要么你直接 14mhz 固定好，，玩 cw，ft8，ssb，

现在这两年的传播建议无脑10米或15米，我这个纬度大半夜10米都有

How do I determine the frequency band for a shortwave radio?

BA7NNC-JOE

BH9FPK Yes, it seems like the LED streetlights on the ground floor are the most likely possibility. Both the front and back streets have rows of streetlights.

Therefore, in the evenings, I can only engage in FT8.

However, when I switched to the non-harmonic oscillation band, I found that the background noise was not very high. After adjusting the antenna, it seemed fine, but the background noise actually increased. 😂 40m / 20m / 15m – I switched between these frequencies several times over the past few nights, and I even posted a thread on the forum asking for medical advice. 😂

BH9FPK

BA7NNC-JOE Another day, try it in a more open outdoor area. Whether or not the antenna resonates or doesn't resonate with the ground noise shouldn't matter. Next time, go to a construction site and set up an antenna there, where there are several cranes. When I turned it on, I got about 59 dB of noise, but it still connected to Mr. Zhao's 400W system. It was probably around 10 or 11 in the morning, when the noise level was slightly lower.

BA7NNC-JOE

BH9FPK Yes, it's really amazing how well you've mastered shortwave radio!

BG2EFX

You can pull all the way out and listen. If the signal is strong, you should still be able to hear it without distortion.
However_{Don't forget to...}
Indeed, antennas that exhibit non-resonant behavior can affect reception strength.

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