[App_rpt-users] Noisy Quad PCI audio

Bob Brown - WØNQX bbrown at byrg.net
Tue Jan 24 15:03:41 EST 2012


Also Check for Ground Loops between chassis connections.

And look for DC riding on the audio leads as well.

And like Jim said use a 1:1 transformer on the audio leads if you cannot
isolate it.


--
Thanks in Advance

   Bob Brown, WØNQX

   Kansas City Metro Area

   http://sm0kenet.net

   http://byrg.net

   http://kcdstar.byrg.net

   http://w0nqx.blogspot.com

Quis custodiet ipsos custodes?

Its not how many watts you have,
its the SIZE of your watts that matter! -- Johnny Marshall, W0JM-SK

--



On Tue, Jan 24, 2012 at 1:08 PM, Ron Simpson <n6gkj.cm98 at yahoo.com> wrote:

>   Hey guys,
>
> I am running an 800mhz VIA ITX Board and a quad pci card. The board is
> 2004 vintage. I have a distinct noise on TX audio both through my node and
> remote base. I have shielded cables to both remotes, I have replace the
> power supply and greatly reduced the high pitch noise.
>
> An interesting note: the tx audio port is quiet when first booting the
> node pc. Once asterisk is running the noise returns.
>
> Has anyone seen this before? Do I have a bad main board or did I miss
> something else..
>
> Thanks for your help!
>
> 73,
>
> Ron - N6GKJ
>
>
> 73,
>
> Ron - N6GKJ
> Sent from Yahoo! Mail on Android
>
> _______________________________________________
> App_rpt-users mailing list
> App_rpt-users at ohnosec.org
> http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.allstarlink.org/pipermail/app_rpt-users/attachments/20120124/97a32e7b/attachment.html>


More information about the App_rpt-users mailing list