OBi 交流声问题

角色

之前都在OBi forum也提及过，而他们说他们只能用Switching power supply。因为我之前有很多Linksys的Linear Transformer，所以在香港和大陆用换上Linksys 12V 1A的Transformer火牛！整个交流声都没有。

现在一个问题是能否switching牛做东linear牛的效果呢？这个问题，可能要用到Spectrum Analyzer才能有答案。

为什么Linksys的SPA （SPA3102，SPA941）都是用Switching power supply就可以做到没有交流声， 而OBi就不可以呢?

因为我也是一名专业Electrical Engineer，可以说主要是成本问题。

角色

角色

Thank you for your advice and suggestion.

In fact, this issue has been confirmed by Obihai Technology that AC hum generated by the switching AC power adaptor is heard with ordinarly corded phones. If cordless phone is used, AC hum is filtered out.

I believe that we may reduce the AC hum by adjusting the impedance and gains to match or fit the corded phone.

YH