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Old May 21st 10, 01:48 PM posted to rec.radio.shortwave
Kevin Alfred Strom Kevin Alfred Strom is offline
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First recorded activity by RadioBanter: May 2009
Posts: 544
Default OK, so I'm gonna put up a new wire antenna...

bpnjensen wrote:
On May 20, 10:32 am, bpnjensen wrote:
...and I'm gonna use existing trees to put it up about 30 feet above
ground, 15 feet above my rooftop on a 5x100 foot suburban lot. Power
lines both in front and back of my house, the ones behind are much
higher voltage, but not real high-tension wires.

All other things being equal, am I better off:

1 - Putting this thing up parallel to, or more perpendicular to, the
powerlines?

2 - Having the coax meet the wire at the base of the tree and
grounding it there, or running the coax up the tree and then depending
on the outer braid on the coax for ground purposes? The coax is
grounded at the first termination point at my MFJ antenna phasing unit
using a short, heavy copper wire to a ground rod.

Thanks,
Bruce


Gentlemen, Peter and Kevin, thank you for the excellent ideas - some I
knew, some ARE new - I don't have a lot of room to experiment, but my
trees are situated so as to allow a generally perpendicular
orientation to the power lines, my main nemesis. Unfortunately, 30
feet is about as high as I can practically put them, but it's higher
than what I have now, so anything is an improvement, eh? Again,
thanks :-)




You're welcome.

Scaling the inverted L I described to half size -- 30 feet vertical
and 45 feet horizontal -- will still give excellent performance.


73,


Kevin, WB4AIO.
--
http://kevinalfredstrom.com/