"gipy" wrote in message
...
I am using a long wire in the trees coming straight to my tuner but I need
to route the feed line underground to keep it stealth and I can't seem to
find any articles on this topic.
My question...
I would like to use insulated wire or does it have to be coax only and
would I lose performance?
Someone told this type of antenna would act as a lighting rod and would be
dangerous.
My other question...
Why would it be more dangerous than any other antenna when most receivers
and transceivers are grounded in some way?
Thanks in advance

You can not burry a single wire feed to a long wire. When the wire leaves
the transmitter/tuner it becomes part of the antenna. If you have to use a
long wire and a burried transmission line, you need a remote tuner and go
from the transmitter to the tuner with coax. Even if you use open wire/twin
lead for the transmission line, you need to keep it several inches from the
dirt. Almost impossiable to do. It will not make any differance if the
wire is insulated or not if it is under ground.

In message , Ralph
Mowery writes

"gipy" wrote in message
...
I am using a long wire in the trees coming straight to my tuner but I need
to route the feed line underground to keep it stealth and I can't seem to
find any articles on this topic.
My question...
I would like to use insulated wire or does it have to be coax only and
would I lose performance?
Someone told this type of antenna would act as a lighting rod and would be
dangerous.
My other question...
Why would it be more dangerous than any other antenna when most receivers
and transceivers are grounded in some way?
Thanks in advance

You can not burry a single wire feed to a long wire. When the wire leaves
the transmitter/tuner it becomes part of the antenna. If you have to use a
long wire and a burried transmission line, you need a remote tuner and go
from the transmitter to the tuner with coax. Even if you use open wire/twin
lead for the transmission line, you need to keep it several inches from the
dirt. Almost impossiable to do. It will not make any differance if the
wire is insulated or not if it is under ground.

The situation described certainly does seem to be one where a remote
automatic tuner would be the best solution (plus a good ground, of
course). To minimise interference problems to-and-from the domestic
electrics, it would normally be better to locate the tuner at the far
end - although this would entail having a longer run of coax.
--
Ian

On Mon, 15 Oct 2012 08:28:57 +0100, Ian Jackson wrote:

it would normally be better to locate the tuner at the far
end - although this would entail having a longer run of coax.

And make it an inverted L while you're at it! I'm just about to order an
SGC239 auto ATU for my inverted L (www.radiowymsey.org/invl.htm). My coax
lies on the ground but only because half the garden is patio and steps.



Charlie.

--
M0WYM
www.radiowymsey.org

Sales @ radiowymsey
http://stores.ebay.co.uk/Sales-At-Radio-Wymsey/

On Monday, October 15, 2012 9:38:37 AM UTC-4, RipeCrisbies wrote:
On Mon, 15 Oct 2012 08:28:57 +0100, Ian Jackson wrote:



it would normally be better to locate the tuner at the far

end - although this would entail having a longer run of coax.



And make it an inverted L while you're at it! I'm just about to order an

SGC239 auto ATU for my inverted L (www.radiowymsey.org/invl.htm). My coax

lies on the ground but only because half the garden is patio and steps.







Charlie.



--

M0WYM

www.radiowymsey.org



Sales @ radiowymsey

http://stores.ebay.co.uk/Sales-At-Radio-Wymsey/

I am in a situation where I HAVE to bury the feedline, there is no other way around it. I have trees about 20 feet away from my home in the back, great for swinging a long wire, dipole, whatever works but being that the actual space between the trees and my home is a common area, I have to bury the coax.
Placing a remote tuner on the other side would be a bit of a hassle but I see its starting to look like the only way to go?
I got plenty of time, I just want to do this once and the right way.
Again, any thoughts appreciated and thanks to all who have posted, it is turning out to be a very interesting thread.

"gipy" wrote in message
...
I am in a situation where I HAVE to bury the feedline, there is no other
way around it. I have trees about 20 feet away from my home in the back,
great for swinging a long wire, dipole, whatever works but being that the
actual space between the trees and my home is a common area, I have to
bury the coax.
Placing a remote tuner on the other side would be a bit of a hassle but I
see its starting to look like the only way to go?
I got plenty of time, I just want to do this once and the right way.

It looks like you will have to use either a remote tuner, or something you
can feed with coax. Maybe a trap type of dipole.
While I have no idea how they would work, you may want to check out some
from DXS Engineering.
http://www.dxengineering.com/search/department/antennas

For some of the low bands I use a homade OCF antenna patterned after the
Carolina Windom. But I also have other antennas up for some of the bands.
..

Dear "gipy" (no call sign provided):

From what you have written, you must get a transmission line across a
"common area" (of something like 20 feet) to a long piece of property that
you control, and the only acceptable scheme is to bury the TL. For a
transmitted signal (I am assuming that you might be a radio amateur) a
buried, single wire TL of only 20 feet would result in little signal
reaching an antenna - so such a TL is counter-indicated. One could support
a twin-wire (two parallel wires) TL within a buried, larger-diameter
"plastic" conduit for 20 feet and not loose much, however you would have to
craft a scheme for supporting the twin-wire TL in the approximate center of
the conduit and the installation is likely to be provocative to other users
of the common area. So, coax it is. To have the coax have little loss you
must use BIG coax or not let the SWR get too large. By stages, arrive at
the conclusion you stated that the way to go is to use coax with a good
quality, autotuner at the far end (and a good ground). One can use a spade
(or one of many other tools including a larger knife) to slit the soil and
insert coax.

You will find it instructive, once you know the geometry of your long-wire
to use a computer program like EZNEC to get an idea where lobes are
expected. After you install, let the group know what you did. 73, Mac
N8TT

"gipy" wrote
I am in a situation where I HAVE to bury the feedline, there is no other way
around it. I have trees about 20 feet away from my home in the back, great
for swinging a long wire, dipole, whatever works but being that the actual
space between the trees and my home is a common area, I have to bury the
coax.
Placing a remote tuner on the other side would be a bit of a hassle but I
see its starting to look like the only way to go?
I got plenty of time, I just want to do this once and the right way.
Again, any thoughts appreciated and thanks to all who have posted, it is
turning out to be a very interesting thread.


J. C. Mc Laughlin
Michigan U.S.A.
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