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October 18th 03, 01:28 AM

In article ,
(W1RFI) writes:

Even if the area distribution lines are buried, the wires come up
to (usually pad-mounted above ground) transformers and the
BPL signal will permeate all the wiring in your (and your
neighbors') house(s) ...

Underground distribution will help (some) but it doesn't actually
solve the problem.

Right now, the emissions I heard in the trial areas were weaker in areas of
underground distribution.

That's to be expected if you stayed on the street. If you drove up to a house,
the racket might be a lot more.

The real killer test would be to have a "typical" amateur station in a
neighborhood served by underground utilities carrying BPL. Say, a 2 story frame
house on a half-acre or so, with a G5RV or dipole at 50 feet strung over the
the house.

Wonder how much BPL garbage that setup would pick up?

However, the losses are higher, so the utility
would
have to install its digital repeaters more often along the underground lines.
It is a safe assumption that the industry that is asking the FCC for higher
emissions limits will increase the power so that underground wiring is at
those
limits, too. We need to stay focused on what the rules would permit -- 30
uV/m
at 30 m -- rather than individual implementations that may be below the
limits in some cases.

A question arises - 30 m from what? If every piece of house wiring has the BPL
signals on it, in many locations you cannot get 30 meters away.

Right now, the companies are probably using "stock" equipment for these
marketing trials. When it goes live, you can bet they will develop higher
powered systems as the most economical way to deploy in underground-wiring
areas.

Is there stock equipment for BPL yet? Or could they be using prototypes?

73 es tnx for all the hard work de Jim, N2EY

I still owe ya that lobstah, Ed.

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