Re: ground-loop problems


William Sommerwerck wrote:

OK, then give it a try in 1080i and see if you still have the loop.

It's impractical, because my component-video cables aren't long enough to
allow me to connect to the monitor while the Blu-ray player remains
connected to the audio system.

I have some other tests to run, and some people to talk with about ground
loops in general, and my system in particular. I will eventually report
back.

It's almost impossible to find cable isolation transformers. PartsExpress
sells one, but specifically states it's not suitable for digital signals
(presumably because it doesn't work well at the frequencies digital is
transmitted on). Comcast doesn't stock any, as they state very few customers
claim to have problems. I might buy two baluns, wire them together, and see
what happens.


William, the way broadcast & recording studios in the US eliminate
ground loops is with 4" to 6" wide copper run between racks & consoles.
This is either silver soldered or brazed at the junctions to reduce the
ground system impedance. Soldering is the preferred method, but most
people can't solder 16 square inches of copper without burning a hole in
it. With a proper grounding system, it doesn't matter which phase or
breaker a piece of equipment is on.

http://www.gacopper.com/022-CopperStrap.html is an example of what is
used. Be advised that this method isn't cheap, but it is effective, and
doesn't degrade like other systems.


--
You can't have a sense of humor, if you have no sense!
.

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