有地盒既巴打請進 (41#開了新topic)

edison133 · 發表於 2014-4-14 10:28

siuping 發表於 2014-4-14 09:56
So... are u using two ground boxes to prevent group loop?

No need,
I using PAC ground box now, it provide 2 output for connect 2 gears!!
So, it will not have any ground loop issue!!!
For your information, PAC ground box both output are separated.

siuping · 發表於 2014-4-14 10:37

avad 發表於 2014-4-14 10:11
插在DAC的BNC-in。

BNC-in should be the digital ground. My DAC will somehow being unstable if connecting ground box to digital ground. Do u know ur DAC analog and digital ground are separated or not?

siuping · 發表於 2014-4-14 10:49

edison133 發表於 2014-4-14 10:28
No need,
I using PAC ground box now, it provide 2 output for connect 2 gears!!
So, it will not hav ...

Me 2 using PAC ground box but only using one port since my soldering tools lent to Yuppi hing. But I don't understand why there will be no ground loop if the two output are basically connected inside the ground box.

Glock18C · 發表於 2014-4-14 10:58

jackt 發表於 2014-4-12 23:07
接機殼係安全的做法，不一定最好聲，按照 itoy2008兄講法，分開 chassis ground 和 signal ground 用不相 ...

明白許多了 thanks
現打算diy多一個地盒

edison133 · 發表於 2014-4-14 11:00

siuping 發表於 2014-4-14 10:49
Me 2 using PAC ground box but only using one port since my soldering tools lent to Yuppi hing. But ...

Because Ground box inside resistor (between 2 outputs) is big!
The ground voltage will not thought signal ground 1 go to signal ground 2, due to the inside resistor.
So it is not a actual loop!

siuping · 發表於 2014-4-14 11:19

edison133 發表於 2014-4-14 11:00
Because Ground box inside resistor (between 2 outputs) is big!
The ground voltage will not thought ...

Thx. I thought the resistance is not so high...

edison133 · 發表於 2014-4-14 11:35

siuping 發表於 2014-4-14 11:19
Thx. I thought the resistance is not so high...

簡單講:
器材與器材之間的 signal Ground 連接內阻是很低的!小過0.1ohm!
而器材-地盒接線-電气石-地盒接線-器材之間的內阻一定相對大很多。
所以電是不會經地盒而過的!

siuping · 發表於 2014-4-14 12:03

edison133 發表於 2014-4-14 11:35
簡單講:
器材與器材之間的 signal Ground 連接內阻是很低的!小過0.1ohm!
而器材-地盒接線-電气石-地盒 ...

Thx. So that would be the reason why connecting ground box with chassis and rca ground is still ok.

edison133 · 發表於 2014-4-14 12:10

siuping 發表於 2014-4-14 12:03
Thx. So that would be the reason why connecting ground box with chassis and rca ground is still ok ...

是的!
不過按 Chassis 無咁好效果的

siuping · 發表於 2014-4-14 12:14

edison133 發表於 2014-4-14 12:10
是的!
不過按 Chassis 無咁好效果的

yes. I'm connecting to amp rca ground.

[討論] 有地盒既巴打請進 (41#開了新topic)