high-pitched whine from power adaptor

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shap:
Open a case with obi:  "Obihai Support Team" <support@obihai.com>
Drop them a note.

jwang:
Yeah, I just did that, and they responded super fast. A replacement adapter is on the way. I hope the replacement one won't give out that noise.

Thanks. Have a good day!



Quote from: shap on April 28, 2011, 09:07:35 am

Open a case with obi:  "Obihai Support Team" <support@obihai.com>
Drop them a note.

yhfung:
Based on my past experience of using Sipura/Linksys ATA for a number of years, a good switching transformer would not give too much AC hum when ordinary corded phones are used.

You may have the previous discussion of AC hum in the following link:

http://www.obitalk.com/forum/index.php?topic=367.0


When I visited a very big electronics fair in Hong Kong recently, I have already approached different transformer suppliers and got a reply that ordineary switching power adaptors are not good enough for audio device (such as OBi110 and OBi100). Most of US/CAD, European customers request the swtiching transformers to pass certain performance standards which are often required for IP Phone or other audio products.

The unit price is around 2.6USD.

A very good piece of device OBi110 or OBi100 which comes with a general grade of switching power adaptor will DEGRADE the audio performance when OBi devices are comapared with the Sipura/Linksys ATAs.

Most of customers does not mind to pay several dollars more if the AC hum is removed.


YH

Vucien:
I have the OBi202 and it makes a high-pitch whining siren-like noise. It definitely gives me a headache. I suppose I could put it in another room, but then I'd have to move my DSL modem as well to another room along with the OBi202. 

roguegaston:
I just got the 202 and it also has the high-pitched whine coming from the unit itself.

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