我的短波电台在切换到服务器电源供电时发射会产生极大的机内干扰和天调无法正常工作（驻波爆炸）和发射的情况，而切换到锂电供电则一切正常。然后排查后发现由于我家老房子没有地线且零线火线疑似反接，服务器电源外壳携带72v-110v的电压，不知道是不是由于接地不良引起，现考虑改善接地并更换成求精通讯电源。请各位大佬帮忙分析并提出解决方案在线急

@"BI1RRE"#p29176 主要是我家住四楼，飞线插地不太现实，我在考虑把我电台室接地先做了，我准备与楼道里的水管接通，然后再看下一步解决方案。我家是老房子，当时接线路的时候我还没出生，据我爷爷说家里就只有零线和火线，但是装修时零线火线接反也会对地漏电吧，这样的话地线和外壳多少带点电😓

@"BI1RRE"#p29176 再就请教一下电台后的接地口是否也必需要接地

先把零火接反的问题解决了。看城阳电工的视频经常就看到这样的。左零右火，看看是直接交换总线就解决还是部分插座和灯要单独换。然后地线，虽然住4楼，看是否可以利用墙角等位置飞一根线到下面去，线其实也不算长，就是要打到泥土里足够长，可以参照相关规范

@"BI1RRE"#p29176 我刚才将地线零线火线测量了电压，发现我引出来的服务器电源地线（没有与大地接通的地线）带电110v，排插断电后依然带电110v，火线（暂时按照左零右火）带电220v，排插断电后依然带电36v，零线110v，断电后带电55v，我不敢往下修了，这估计不是单纯的接地不良了吧

@"BI1RRE"#p29176 地线（未与接地体接通）插上插头后带电220v

Regarding issues related to radio and power.

BH6qct-2

When my shortwave radio switches to being powered by the server's power supply, it generates significant internal interference and the antenna tuning becomes impossible (resulting in a standing wave explosion), while everything works normally when using lithium battery power. After troubleshooting, I discovered that my old house lacks a ground wire, and there is a suspected reverse connection between the neutral and live wires. The server's power supply case carries 72V-110V voltage. I suspect this may be due to poor grounding. I am now considering improving the grounding and replacing it with a precision communication power supply.
Please seek the expertise of senior members to analyze the issue and propose solutions.
Online emergency

BH6qct-2

Welcome to the discussion where HAM enthusiasts can ask questions and get answers.

BI1RRE

没地线不行，我服务器电源和求精都有，我起初和你一样遇到问题，只是我发现电台外壳或天线电手特严重，我也以为电源问题，直到某天我实在无法忍受插拔天线电手这事儿，我用万用表测了一下人体和外壳存在38v电压，接着测了接电源的插排和智能插座，开始怀疑这种智能控制插座内部接地问题，最后才排查到了墙面插排，可能房子装修时师傅接地没弄好，地线虽然连接但是零地电压35v多，显然地线不良，只能从其他接地好的插排进行走线，如果插排接地有问题不论是专业短波电源还是服务器电源接电台后均存在对人体放电问题。且可能出现楼主的干扰问题，建议是先把接地问题搞定，老家方便可以弄根铁管埋入地里1米多，或者参考标准接地操作

BH6qct-2

BI1RRE The main issue is that I live on the fourth floor, and it's not practical to run cables directly into the ground. I'm considering grounding my radio room first, and then connecting it to the water pipes in the hallway. Once that's done, I can explore further solutions. My house is an old one, and when the wiring was originally installed, I wasn't even born yet. According to my grandfather, there were only neutral and live wires in the house. However, if the neutral and live wires are connected incorrectly during renovation, it could also cause a ground fault. In that case, the neutral wire and the casing would carry some electricity.😓

BH6qct-2

BI1RRE Could you please clarify whether the grounding point on the radio also needs to be grounded?

BH6qct-2

BI1RRE I just measured the voltage of the neutral, zero, and phase wires, and found that the ground wire I had connected to the server's power supply (which was not grounded) was at 110V, and even after unplugging the outlet, it remained at 110V. The phase wire (temporarily assuming left-neutral, right-phase) was at 220V, and even after unplugging the outlet, it remained at 36V. The neutral wire was at 110V, and after unplugging the outlet, it was at 55V. I'm afraid to continue working on this, as it doesn't seem like a simple grounding issue.

BH6qct-2

BI1RRE Ground wire (not connected to the grounding body) – When the plug is inserted, it carries 220V of electricity.

BG8AMG

First, address the issue of reversed polarity. I often see this problem in videos by Cheng Yang Electric. If it's simply a matter of swapping the wires, that would solve it. Otherwise, you might need to replace individual outlets and lights. Next, consider the grounding wire. Even though you live on the 4th floor, see if you can run a wire from a corner or other location down to the ground. The wire itself isn't very long, but it needs to be long enough to reach the soil so that it complies with relevant regulations.

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