Ground loop hum?

[Jack Dotson]

I built my house about four years ago and until yesterday everything was
fine. However, a couple of days ago I started experiencing trouble with my
road runner connection so yesterday a technician came out. He found the
signal strength was too low, and he replaced the cable from their box to the
small box on the side of my house. He also replaced the splitters in the
attic as I got digital cable installed a couple of months ago and the
splitters didn't cover the full freq range used by the digital channels.
Said he was surprised it was working.

Anyhow, he gets my RR restored and the picture on my TV's look better than
ever. But, when I went to watch a movie last night I got the all too
familiar ground loop hum. I disconnected the cable input immediately and
the hum disappeared.

I'm on my way to the store today to get a 3-prong to 2-prong adapter, but I
was wondering what he might have done to cause this problem? Also,
shouldn't they be responsible to fix it? I called them this morning and
told them of the situation and was promptly told that many people experience
this and there is nothing they can do?

Any advise/suggestions?

BTW, I looked outside where they have their box on the side of my house and
the only ground I saw was a wire going from the box to conduit of my main
a/c feed from the breaker box? Is this normal? Also, is there supposed to
be some kind of ground at the other end as well. There big ugly green box
that feeds several houses is also in my back yard.

Thanks

[Mr 645]

http://www.jensen-transformers.com/

The VRD-1FF is what you need.

The ground they provide give lighting or other dangerously high current a place
to go besides through the cable line but when I complain about noise, they
always said it's normal and won't deal with it.

Jon


<<<BTW, I looked outside where they have their box on the side of my house and
the only ground I saw was a wire going from the box to conduit of my main
a/c feed from the breaker box? Is this normal? >>>

http://www.jonlayephotography.com

[ludovic mirabel]

(Mr 645) wrote in message >...
> http://www.jensen-transformers.com/
>
> The VRD-1FF is what you need.
>
> The ground they provide give lighting or other dangerously high current a place
> to go besides through the cable line but when I complain about noise, they
> always said it's normal and won't deal with it.
>
> Jon
>
>
> <<<BTW, I looked outside where they have their box on the side of my house and
> the only ground I saw was a wire going from the box to conduit of my main
> a/c feed from the breaker box? Is this normal? >>>
>
> http://www.jonlayephotography.com

The connection of cable to your house electricity ground is a
wellknown source of hum. I had it.
You'll get full and transparently written information on the web
"Ground loop )or loops?)Ken Simmons". It includes a much cheaper way
to go than via Jensen transformer.
If you can get your cable people to find their own ground instead
of hoooking it up to your house electricity ground, that they
obviously had done ,you'll do even better.
Ludovic Mirabel

[james mitchell]

"Jack Dotson" > wrote in message
. net...
> I built my house about four years ago and until yesterday everything was
> fine. However, a couple of days ago I started experiencing trouble with
my
> road runner connection so yesterday a technician came out. He found the
> signal strength was too low, and he replaced the cable from their box to
the
> small box on the side of my house. He also replaced the splitters in the
> attic as I got digital cable installed a couple of months ago and the
> splitters didn't cover the full freq range used by the digital channels.
> Said he was surprised it was working.
>
> Anyhow, he gets my RR restored and the picture on my TV's look better than
> ever. But, when I went to watch a movie last night I got the all too
> familiar ground loop hum. I disconnected the cable input immediately and
> the hum disappeared.
>
> I'm on my way to the store today to get a 3-prong to 2-prong adapter, but
I
> was wondering what he might have done to cause this problem? Also,
> shouldn't they be responsible to fix it? I called them this morning and
> told them of the situation and was promptly told that many people
experience
> this and there is nothing they can do?
>
> Any advise/suggestions?
>
> BTW, I looked outside where they have their box on the side of my house
and
> the only ground I saw was a wire going from the box to conduit of my main
> a/c feed from the breaker box? Is this normal? Also, is there supposed
to
> be some kind of ground at the other end as well. There big ugly green box
> that feeds several houses is also in my back yard.
>
> Thanks
>
>

I had the same problem. I purchased a coax grounding block from radio
shack. I wired the ground connector on the block to the ground input on
SAME WALL OUTLET powering the audio equipment. This eliminates any voltage
difference between the coax ground and the audio equipment ground. This
completely solved the problem for me.