[mythtv-users] Hum on analog audio to TV

[Gabe Rubin]

On Wed, Oct 22, 2008 at 10:03 AM, James Crow <james at ultratans.com> wrote:
> 3) Connect a wire from PC chassis to coax outer braid.
> - This decreased the volume of the hum, but it was still present.
> Perhaps a soldered connection instead of my fingers holding it would
> produce better results. Would connecting the coax braid to house ground
> accomplish the same thing as chassis ground to coax? I have an unused
> ground plug in the outlet I could wire to the coax braid.
>
As previously mentioned, I tried connecting the coax braid to the
house ground using a ground plug in the outlet wired to the coax braid
(although I did not state this with the correct terminology as I just
did now).  This decreased the volume of the hum, but it was still
present.  I simply could not eliminate the hum completely until I went
all digital (although I did not try isolation transformers of those
power strips taht also have coax in and out -- one of those may work,
but I simply decided to upgrade to all digital for video and audio).

So, it is worth trying as it will just take a few minutes to do, but
don't necessarily expect different results from what you have already
seen.