Buzz from plasma TV part two

When last we met, I had removed the RCA plugs from the back of the
set, causing the buzz to go away. It was suggested that it was because
of needing to isolate the cable and suggestions were given.
A little more information and I wanted to know if it changed any
suggestions. When I disconnect the coax cable between the wall and the
Brighthouse supplied Tivo equivalent, the buzz goes away. However, when
I connect it back up, the buzz changes in intensity when I move around
the coax connector, so I am wondering if maybe the coax is broken and
all I need to do is correct that. Also it was suggested that maybe I
just connect HDMI to HDMI. Would this solve the other problem too?

If you have HDMI connnectors, might as well use them. Cables are cheap at
www.monoprice.com

I think the coax cable is good. Buzzing when connected is giving a ground
to go thru. If it was bad there would be no buzz and possibly no signal.


"Kurt Ullman" wrote in message
...
When last we met, I had removed the RCA plugs from the back of the
set, causing the buzz to go away. It was suggested that it was because
of needing to isolate the cable and suggestions were given.
A little more information and I wanted to know if it changed any
suggestions. When I disconnect the coax cable between the wall and the
Brighthouse supplied Tivo equivalent, the buzz goes away. However, when
I connect it back up, the buzz changes in intensity when I move around
the coax connector, so I am wondering if maybe the coax is broken and
all I need to do is correct that. Also it was suggested that maybe I
just connect HDMI to HDMI. Would this solve the other problem too?

On Fri, 29 Feb 2008 20:34:34 -0500, Kurt Ullman
wrote:

When last we met, I had removed the RCA plugs from the back of the
set, causing the buzz to go away. It was suggested that it was because
of needing to isolate the cable and suggestions were given.
A little more information and I wanted to know if it changed any
suggestions. When I disconnect the coax cable between the wall and the
Brighthouse supplied Tivo equivalent, the buzz goes away. However, when
I connect it back up, the buzz changes in intensity when I move around
the coax connector, so I am wondering if maybe the coax is broken and
all I need to do is correct that. Also it was suggested that maybe I
just connect HDMI to HDMI. Would this solve the other problem too?

This is a classic ground loop due to improperly or inadequate
grounding of the cable source. It should have been grounded by the
installer at the main house ground but they often take the easy route
and ground it at the cable entry point. Best solution is to get the
cable company to fix it but they usually deny responsibility. The
other solution is to get a a ground loop interrupter and put it in the
cable line as it emerges from the wall.

Kal

In article ,
Kalman Rubinson wrote:


This is a classic ground loop due to improperly or inadequate
grounding of the cable source. It should have been grounded by the
installer at the main house ground but they often take the easy route
and ground it at the cable entry point. Best solution is to get the
cable company to fix it but they usually deny responsibility. The
other solution is to get a a ground loop interrupter and put it in the
cable line as it emerges from the wall.

Kal

Interestingly, I have had this particular hook-up for about 18 months
before the buzzing started. Which is another reason I was thinking it
might be some sort of co-ax failure. Also, it started long after mowing
season, so I doubt it was anything I dislodged with my mower (g).

On Feb 29, 5:34 pm, Kurt Ullman wrote:
When last we met, I had removed the RCA plugs from the back of the
set, causing the buzz to go away. It was suggested that it was because
of needing to isolate the cable and suggestions were given.
A little more information and I wanted to know if it changed any
suggestions. When I disconnect the coax cable between the wall and the
Brighthouse supplied Tivo equivalent, the buzz goes away. However, when
I connect it back up, the buzz changes in intensity when I move around
the coax connector, so I am wondering if maybe the coax is broken and
all I need to do is correct that. Also it was suggested that maybe I
just connect HDMI to HDMI. Would this solve the other problem too?

yes the buzz is changing in intensity but no, the cable is not broken
yes, if you check your HDMI connections to insure compatibility
(you have the right cable or adapter)
the HDMI may eliminate the groundloop but not 100% percent certain
also don't spend a lot on HDMI cables...
the cable TV isolation transformer (ground isolator) is the most
reliable
method. You can expect to spend $15- 75 on one.
You can make a transformer out of radio shack parts for about $15.

Interestingly, I have had this particular hook-up for about 18 months
before the buzzing started. Which is another reason I was thinking it
might be some sort of co-ax failure. Also, it started long after mowing
season, so I doubt it was anything I dislodged with my mower (g).

what has caused this is the cable company has hooked another ground
wire to it's system. before the ground wire was hooked you did not
have the
problem. i don't think this is a coax failure.
these type of groundloops occur in home theater all the time.
It is fixable.

In article
,
mykey wrote:


Interestingly, I have had this particular hook-up for about 18 months
before the buzzing started. Which is another reason I was thinking it
might be some sort of co-ax failure. Also, it started long after mowing
season, so I doubt it was anything I dislodged with my mower (g).

what has caused this is the cable company has hooked another ground
wire to it's system. before the ground wire was hooked you did not
have the
problem. i don't think this is a coax failure.

Okay. Thanks for all the input. When I got the HDTV and the HD
converter, they had to put in new wire all the way from the street to
the TV get enough of a signal (even after putting in an amplifier) so
that I could get HD. They haven't done anything else since, including
any work on the others who share the box at the street. Since it worked
okay for the last 18 months, it just sorta confused me for awhile, I
guess.

K

Okay. Thanks for all the input. When I got the HDTV and the HD
converter, they had to put in new wire all the way from the street to
the TV get enough of a signal (even after putting in an amplifier) so
that I could get HD. They haven't done anything else since, including
any work on the others who share the box at the street. Since it worked
okay for the last 18 months, it just sorta confused me for awhile, I
guess.

K

i don't think there is anything wrong with your equipment.

A direct wire from the street to the TV is desirable. If you install
an amp
it should be at the start of the wire, not the end.
If your TV has a three prong AC power cord you might be able to fix it
cheaper.
you are familiar with the hardware store three prong / two prong power
plug
adapters? It costs about $1? If your TV has a three prong power plug,
convert
it over to 2 prong with this adapter.
This adapter allows lifting one of the grounds that connect to the TV.
This may
or may not solve the buzz, depending on the rest of your system
wiring.
But is you sound equipment hooked to the TV audio outputs?

look at this ground lift adapter:
http://www.instawares.com/three-pron...l99480.0.7.htm

On Sat, 1 Mar 2008 14:33:45 -0800 (PST), mykey
wrote:

look at this ground lift adapter:
http://www.instawares.com/three-pron...l99480.0.7.htm

This is NOT a ground lift adapter although it can be used as such. It
is an adapter to use a 3prong device with a 2prong receptacle if one
uses the auxiliary wire. This is not a solution and, in some cases,
can be dangerous. You can buy a ground-loop interrupter which goes in
series with the cable from Radio Shack or other suppliers which will
separate the cable ground from the rest of the system but leave
everything properly grounded. Not as good as fixing the bad ground at
the source but it is safer than lifting the ground.

Kal