Newsgroups: sci.electronics.misc
Subject: Re: due to some kind of interference, monitor display is "shaking"
References:  <[email protected]>     
"John H."  writes:

> I found something at radio shack that says it's an antenna 
> something, and it's coax to coax, but says it is more for 
> tv, and it's $5.99.  It's 75ohm. would that do the same thing as
> what you suggested?

I can't say. I don't have any Radio Shack anywhere nearby because 
I don't live in USA. I don't know their current selection other 
than some checking on their web site sometimes when somebody asks 
on some specific products. To make any comment I would need 
more details to be able to find the product description at 
www.radioshack.com and then make my judgement woudl this 
product sound as right for this or not. 
 
> I don't know if this makes sense, but at certain parts of the day,
> with everything connected(or if i unplug tv), the shaking is bad, but this
> morning there was little if any shaking, with everything connected?

The severity of ground loop induced problems can vary over time. 
I have seen this. In many situations the severity of the problems 
is related to the load of your house electrical system, or if 
some specific equipment are turned on or not. In many cases the 
ground potential differences tend to vary more or less depending 
on how the electrical power system is loaded inside the house.
  
> On Mon, 12 Sep 2005 10:54:46 +0300, Tomi Holger Engdahl wrote:
> 
> > "John H."  writes:
> > 
> >> Sorry for multiple posts.  Just wanted to mention, after removing 
> >> connection from splitter to tv card on computer, shaking is gone.
> >> But now I cannot watch tv:(
> > 
> > Put an antenna cable isolator between the PC TV card and your 
> > splitter sould keep the shaking away and still allow you to 
> > watch TV. 
> > 
> > More information:
> > http://www.epanorama.net/documents/groundloop/home_solving.html
> > http://www.epanorama.net/documents/groundloop/antenna_isolator.html
> > http://www.epanorama.net/documents/groundloop/antenna_isolator_building.html
> 
> 
> 

-- 
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at 
http://www.epanorama.net/