關於單點接地既做法

chowhwk

Jameskyc 兄

小小建議

1. 把電源線的水線廢掉來達成一點接地方案是理論上可行，但絕對要三思。家中電器的地線在安全扮演莫大關係。我認為如果可以不用這方法是最好。
2. 作大更改之前，先確定是否有Ground Loop 問題。
3. 簡單方法，雖然不是所有發燒友都認同是把所有音響器材都接到同一條電源用一個拖板，因此所有地線都不會經過整個房間的電源地線才接到一起。
4. 把所有機盒都用Star Connection 接地一點，透過這個方法把存在的Ground Loop 短路，減低影響。
5， 訊號線改為採用平衡線。

接地是大題目，小弟知道也不多，接地良好可以把噪聲降低，玩法很多，Hiendy 高手林立，一定可以給你更多方案。

vincenthoy28

chowhwk 發表於 2012-7-20 23:10
Jameskyc 兄

小小建議

Agree with item 2 and 4! That why I propose to measure the impedence by DMM!

昨日之歌

咁多位CHING, 小弟都有少少問題想問
我本身電腦做訊源, 之後順序:
DAC > 前級 > 後級
經檢查, DAC > 前級 電阻無限大, 冇Ground Loop 問題
前級 > 後級, 電阻0.幾, 應該有Ground Loop 問題
再CHECK DAC > 後級電阻無限大, 冇Ground Loop 問題

咁小弟應該廢掉 前級 還是 後級的線?

zivwct

vincenthoy28 發表於 2012-7-21 00:31
Agree with item 2 and 4! That why I propose to measure the impedence by DMM!

Vincent 師兄你好

錦我想問 我是先一條Power core 去隔離牛 隔離牛再分電源去和音響器材
情況就似以拖板 再供電給全套系統

錦係咪無Ground Loop 問題? 因為最係都係經一條POWER CORE 接COMMON GROUND?

多謝賜敎～～～！　

vincenthoy28

zivwct 發表於 2012-8-3 10:29
Vincent 師兄你好

錦我想問 我是先一條Power core 去隔離牛 隔離牛再分電源去和音響器材

First, did you check if you isolated transformer Input ground is connected to output ground?

zivwct

vincenthoy28 發表於 2012-8-3 13:05
First, did you check if you isolated transformer Input ground is connected to output ground?

係AR... 係接地的..... 你意思係我將 POWER CORE 接隔離牛的地線 斷開? 變成整個系統都唔接地?

racewong

vincenthoy28 發表於 2012-8-3 13:05
First, did you check if you isolated transformer Input ground is connected to output ground?

支持VINCENT兄多D分享.

vincenthoy28

zivwct 發表於 2012-8-3 10:29
Vincent 師兄你好

錦我想問 我是先一條Power core 去隔離牛 隔離牛再分電源去和音響器材

I think there is a chance that ground loop still be formed....

It will be "a floating ground loop" formed locally if this is isolated from electrical supply earth if the earth at isolated transformer is not interconnected. Therefore, I still sugguest you shall check against the impedence between equipment chase/socket earth against the RCA/balance earth first and decide what shall be done next.

zivwct

vincenthoy28 發表於 2012-8-4 10:14
I think there is a chance that ground loop still be formed....

It will be "a floating ground loop ...

Thx~~~~ I will check it first~
師兄可唔可以講解埋咩叫做星形落地?

其實我 CD 機, DAC 同埋 INT. AMP 外殼都接上了地盒 錦係咪星形落地?

唔該灑