Interference with audio SD-DVR40
 

I recently installed an SD-DVR40 receiver to one television. I get the
video through an S-video connection and the audio through RCA-jack cabling.
I only have the red and white RCAs connected with the yellow (video) just
dangling at both ends, but I seem to be getting some interference on my
audio output from my TV, especially when music is playing (sort of a shhh-
ing sound). When I pushed the unshielded jacks farther away, there was a
lessening of this noise, so my guess is that the unused video jacks need to
be shielded better. How does one do that? I could go out and buy straight
audio cables, but I'm hoping that there is some less expensive cure.

If this question has already been answered, I apologize, but I was unable
to find it.

Thanks,
Cliff

Cliff Otto wrote:
I recently installed an SD-DVR40 receiver to one television. I get the
video through an S-video connection and the audio through RCA-jack
cabling. I only have the red and white RCAs connected with the yellow
(video) just dangling at both ends, but I seem to be getting some
interference on my audio output from my TV, especially when music is
playing (sort of a shhh- ing sound). When I pushed the unshielded
jacks farther away, there was a lessening of this noise, so my guess
is that the unused video jacks need to be shielded better. How does
one do that? I could go out and buy straight audio cables, but I'm
hoping that there is some less expensive cure.

If this question has already been answered, I apologize, but I was
unable to find it.

Thanks,
Cliff

Rip off the video cable. It should just split off from the audio cables.
Also, make sure if you have to cross power AC cords with
audio/video/speaker cables, they should cross at a 90 degree angle.

--
David G.

David G. seemed to utter in :

Rip off the video cable. It should just split off from the audio cables.
Also, make sure if you have to cross power AC cords with
audio/video/speaker cables, they should cross at a 90 degree angle.


I remember an interesting article I read a couple of years
ago in Sound & Vision magazine (formerly Stereo Review).
They set up two identical systems, one using high quality cables
and observing all of the "rules of thumb" about crossing cables,
power cords, etc. for maximum sound quality. The other they
used the cheapest possible cobles and wires and repeatedly
broke every possible "rule of thumb". They then had several
"golden ears" do listening tests on the resulting systems
and they could not tell one system from the other. I was
a little surprised because the photo of the the wiring of
the "bad" system was truly frightening. But it didn't seem
to have an audible effect.

-- TRW
_______________________________________
My e-mail: t r w 7
@ i x . n e t c o m . c o m
_______________________________________

"David G." wrote in
:

Rip off the video cable. It should just split off from the audio cables.
Also, make sure if you have to cross power AC cords with
audio/video/speaker cables, they should cross at a 90 degree angle.


Probably should have dawned on me that I could separate the cables. I'll
have to work on the 90° crossing, though.

Thanks,
Cliff Otto

Tim Witort wrote:
David G. seemed to utter in :

Rip off the video cable. It should just split off from the audio
cables. Also, make sure if you have to cross power AC cords with
audio/video/speaker cables, they should cross at a 90 degree angle.


I remember an interesting article I read a couple of years
ago in Sound & Vision magazine (formerly Stereo Review).
They set up two identical systems, one using high quality cables
and observing all of the "rules of thumb" about crossing cables,
power cords, etc. for maximum sound quality. The other they
used the cheapest possible cobles and wires and repeatedly
broke every possible "rule of thumb". They then had several
"golden ears" do listening tests on the resulting systems
and they could not tell one system from the other. I was
a little surprised because the photo of the the wiring of
the "bad" system was truly frightening. But it didn't seem
to have an audible effect.

-- TRW
_______________________________________
My e-mail: t r w 7
@ i x . n e t c o m . c o m
_______________________________________

I wish I would have read that article. I don't think the problem affects
everyone or I believe the problems associated with a 60Hz AC crossing an
audio cable would be more widespread. Of course, not everyone has ground
loops problems, but those that do will try almost anything. I suppose if
changing your cable layout fixes a problem, you're lucky. But I'd be
willing to try that first before taking more drastic steps.

I don't adhere to the 90 degree rule because it would be too difficult
with my layout. But I do separate the cable types with that plastic
hoses to bundle them.

--
David G.