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Re: Lack of information on the web.

I can't believe there is so little information on grounding subject and its "sinking" capability on the web, even in communication area. I thought there is going to be tons of information on a that subject, but apparently not.

Think there might be a reason for that? :)

May be a trip to library and looking up that subject in communication and ham/shortwave handbook will be more fruitful.

Maybe. I'll be glad to consider whatever you can offer. But I am looking for something more than something simply saying "it is." I want to see the REASON(S) why it is.

Any way, I ran cross this article by accident and it shed little bit of light on this subject. One thing I kept running cross was emphasis on having a low impedance and low resistance to ground to make it work properly.

Having low resistance paths to the reference ground (and I don't mean earth ground) is desirable because it's through those paths that all the return current flows, be it return current for the signal or return current for induced noise. The lower the impedance, the lower the voltage drop across that impedance for a given amount of current flowing through it and the lower the common impedance coupling into the circuit.

Give this article by Henry Ott a read: Ground-A Path for Current Flow.

Any way, here is the article. Note that in 1.2.2.5. Grounding and Bonding section, he mentioned that:

"Grounding and bonding consists of using conductive connections between equipment (bonding) and between equipment and the earth (grounding). The effects of this are two-fold. The connection to earth provides an infinite sink for the electromagnetic energy. The effect of this is to keep all of the equipment connected to the ground at a stable potential"

Ok. But if all the equipment is connected to a singular point it will still all be at the same potential, yes?

And he doesn't explain just how the earth acts as an infinite sink for electromagnetic energy.

se




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