如题，电流扼流巴伦

双绞漆包线+磁环绕电流巴伦容易出现SWR偏高或巴伦有特殊的频率特性，比较讲究绕制工艺和磁环性能。用馈线绕巴伦几乎不存在SWR异常问题，磁环性能仅影响不同频率的共模抑制特性。

借楼问一句，咸鱼上有几个卖的巴伦直接是把馈线缠绕在磁环上，说是能改善玩FT8时机器对电脑的影响，这种时真的有效吗？看了材料和制作工艺并不难，有点想手搓一个试试。

我用的漆包线并绕，没双绞，做出来在HF段SWR都很正常，不过共模抑制特性未能验证

@"CQ-BG8LTU"#p69313 有效的，本质上就是个巴伦，用于抑制共模电流

What are the differences between using a 1:1 shielded cable and a cable wrapped with insulating tape?

BI3BGM

As the title indicates, a current limiting choke.

BH7JUO

Coiled copper wire + toroidal current baluns are prone to having high SWR or exhibiting specific frequency characteristics, which requires careful winding and magnetic ring performance.
Using a feedline around the Balun almost eliminates SWR (Standing Wave Ratio) problems. The magnetic field ring primarily affects the common-mode suppression characteristics at different frequencies.

CQ-BG8LTU

Just out of curiosity, I saw a seller on Ham Radio News selling a Balun that directly wraps the coax cable around a magnetic loop. They claim this improves the radio's interaction with the computer during FT8 operation. Is this actually effective?
After reviewing the materials and manufacturing process, it's not difficult to understand. I was actually thinking about trying to make one myself.

BH6QCE

CQ-BG8LTU Effective; essentially, it's a barrel, used to suppress common-mode current.

BG8AMG

The coaxial cable I used was twisted, not shielded, and the SWR in the HF range was normal. However, I haven't been able to verify its common-mode suppression characteristics.

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