I am now certain the signal is being caused internally by the dell. I have
no other connections to the PC that might otherwise cause a ground loop.
On a slightly different note. Now I am going to try loading Dragon NS
preferred onto my Dell which has already VV. Has anyone had any problems
doing this before.
Thanks.
Tony Swales.
Obviously this has nothing todo with my current employer, just me.
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>The problem has to do with the fact that the power supply of Dell does not
>had a ground connection.
>Maybe the problem isn't with the AC to DC conversion in the laptop power
>supply, but rather with the fact that when you are plugged in your laptop
>is connected to your electrical system's "ground." That can sometimes
>produce a "ground loop" (if some other spot in the system is also connected
>to "ground," for example a powered set of speakers). Ground loops are
>notorious for producing hum, since they are in effect large loop antennas
t>hat pick up the 60Hz AC electromagnetic fields from the power lines all
>around us.
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