RadioBanter - View Single Post

March 25th 04, 06:46 PM

In article , PAMNO
(N2EY) writes:

You seem heck-bent on starting some more internecine warfare in
here.

I'm simply asking a question. You are avoiding that question. One would think
that a "radio electronics professional" with your claimed experience would
know the answer, but I guess you don't.

In that case you are wasting everyone's time. :-)

NOBODY has EVER worked with ANY sort of "antenna" that
stretches for miles...and has randomly-distributed "feed points"
from discontinuities all along both overhead and underground
electric power lines. That would be the case for Access BPL.

That observation isn't rocket science. It can be done by anyone
in the vicinity of overhead power lines...and trying to find a
reference to such long-stretching antennas in the best library
anywhere (nothing there).

Trying to come close to a computer model, even with Roy
Lewallen's excellent EZNEC might be done...but only for one
specific community area. THINK. The electric power lines
WERE NEVER DESIGNED AS HF-VHF TRANSMISSION
LINES. They work okay at 60 Hz. 60 Hz doesn't worry about
VSWR or discontinuities and those lines only need to worry
if a splice or other connection conducts and that everything is
insulated that should be insulated.

The electric power distribution lines don't even come close to
having any sort of constant impedance. LOOK. THINK about
observated spacings in overhead systems you can see at any
time there is sufficient light. Do you see uniformity? None
there. Go to another location and observe. Do you see any
uniformity to the first location? Maybe. Try another community.
Is that uniform? ELECTRIC POWER DISTRIBUTION LINES IN
CITIES WERE NEVER DESIGNED AS HF-VHF TRANSMISSION
LINES. THERE IS NO ELECTRIC STANDARD ANYWHERE
THAT SAYS THOSE MUST BE RF TRANSMISSION LINES.

If you can't understand that, then you are just wasting time for
everyone with trying to troll for arguments in here.

Now pull out your two degrees, wipe the dead ivy leaves from
them and show how YOUR "professionalism" says the Access
BPL will be safe and amateurs (or anyone else) won't have to
worry...go ahead, make everyone's day...

LHA / WMD