馈线除了50-5，50-7外还有啥规格的呢，一般短波和UV段都分别用啥规格的，线损又如何呢，欢迎大家来谈谈自己的经验，也欢迎总结。

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50-7过硬过粗，感觉架基地短波台可以用一用，我现在手上的拿出去架台还是有些不方便，也被好几个爱好者吐槽过hhh 目前打算入手50-3的馈线，软一些，野架和平时收拾也能方便点

50W的UV段用-5馈线 100W 20米以内的，用-3或-5都行

我接天线20米左右，用的是1/2馈管，接到室内后准备再做一条2-3米左右的RG142的软线方便接手台用。

线损得去看商家提供的信息

这还用讨论，在你承受的经济和环境结构情况下，越粗越好，越短越好。另外，馈线不都是同轴的，同轴只是其中一小类，而且还不是性能最好的。

不同品牌的线差异也很大。

UV的有了，短波的也说说呗，特别现在QRP电台功率小，到底有多少功率能到天线上辐射出去

@"BI1SFC"#p76776 5米 RG316 -0.4dB @14Mhz -0.6dB @28Mhz，其他馈线损耗都比这小

@"BG5ELQ"#p76779 我是用的50-3,10米的馈线

What are the different specifications of cables, and how does the cable loss vary? I welcome discussion.

BG7NOD

Besides the 50-5 and 50-7, what other specifications are available for feed lines? What specifications are typically used for shortwave and UV bands respectively? How does cable loss affect performance? I welcome everyone to share their experiences and insights.

FengziLeo

The 50-7 is too strong and coarse. I think it could be used with a shortwave base station. However, the one I have doesn't fit easily into my existing setup, and several enthusiasts have also commented on this.
I'm currently planning to purchase a 50-3 feeder line, one that's softer and easier to handle, both when setting it up in the field and when tidying it up afterward.

BH1LAF

50W UV segment -5 feed line
100W, with a range of up to 20 meters – either -3 or -5 dBm is acceptable.

BG7XSS

roor

I connected the antenna, which is about 20 meters long, using a 1/2 wave antenna. After connecting it indoors, I plan to add an additional RG142 cable that is approximately 2-3 meters long to make it easier to connect to a handheld radio.

Liridice

Please check the information provided by the vendor regarding line loss.

BI1NIZ

This doesn't need to be discussed. Under the economic and environmental conditions you are facing, thicker is better, and shorter is better. Also, not all cables are coaxial; coaxial cable is just one type, and it's not necessarily the best performing option.

BG6UA

The differences in cables between different brands are also significant.

BI1SFC

I have UV, can you also talk about shortwave? Specifically, given that QRP radio stations currently have low power output, what is the actual power that can be radiated into the air?

BG5ELQ

BI1SFC 5-meter RG316 cable: -0.4 dB at 14 MHz, -0.6 dB at 28 MHz. Other cable losses are smaller than these values.

BI1SFC

BG5ELQ I am using a 50-3, 10-meter feeder cable.

BG5ELQ

BI1SFC 14 MHz, 0.2 dB

BG7NOD

BI1SFC I think the 50-3 might feel a bit too thin, unless it's just a very short line of one or two meters. For lines longer than 5 meters, it's better to use 50-5 or even larger sizes, otherwise there will be significant line loss.

BG2EFX

1. 5 3 5 7 1/2 inch pipe

BG5ELQ

BG7NOD 10 meters, band 50-3, 100W output, can achieve 90W+, too heavy for this size.

BI1SFC

BG7NOD At that time, the primary consideration was weight. The high-power radio stations could afford it, but the low-power ones were losing power due to the transmission line losses. It was unclear how much power actually reached the antenna.

BG7NOD

BG5ELQ I usually use at least a 50-5 ratio.

BG5ELQ

BI1SFC A difference of 1 dB between 5W and 4W is significant, but the gain provided by the feed height is much more than just 1 dB.

BI1SFC

BG5ELQ Currently, there are many dB and dBm units that I need to learn more about, but I still haven't fully understood them. However, comparing 5W to 4W is easier to understand.

BI4APF

Does cable loss affect reception?

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