Dipole question
 

Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I
noticed there are numerous versions. The vertical is out for obvious reasons. So
there are inverted and horizontal. Is there any version I am better off using
barefoot?

Vinnie S.

On Thu, 13 Jan 2005 11:50:35 -0500, Vinnie S.
wrote:

Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I
noticed there are numerous versions. The vertical is out for obvious reasons. So
there are inverted and horizontal. Is there any version I am better off using
barefoot?

Vinnie S.

The only obvious answer is to use an outside antenna even if it's a
18" mobile antenna mounted on a gutter. Use a disguised antenna if
need be. Having a inside antenna is problematic and is job specific as
to whether it will perform satisfactorily.

On Thu, 13 Jan 2005 16:15:06 -0500, wrote:

On Thu, 13 Jan 2005 11:50:35 -0500, Vinnie S.
wrote:

Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I
noticed there are numerous versions. The vertical is out for obvious reasons. So
there are inverted and horizontal. Is there any version I am better off using
barefoot?

Vinnie S.

The only obvious answer is to use an outside antenna even if it's a
18" mobile antenna mounted on a gutter. Use a disguised antenna if
need be. Having a inside antenna is problematic and is job specific as
to whether it will perform satisfactorily.


Here is my problem. I live out in the woods. I would love to hang an antenna in
a tree behind my yard, but I would have to bury and trench the coax in excess of
about 100-150 feet. And that include hopping over a small 2 foot creek. I have a
ranch, which is long and ideal for a dipole. I eventually will run a cable and
hang an antenna out there, but I just want to do something in the meantime.

Vinnie S.

My recommendation is that you don't put the dipole in the attic. The
dipole is a great antenna but any antenna will take severe losses
trying to penetrate the solid walls of the attic. You will get the best
performance for everyday talking is with the dipole vertical... and in
free space.

Professor
www.telstar-electronics.com



Vinnie S. wrote:
Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my
attic, I
noticed there are numerous versions. The vertical is out for obvious
reasons. So
there are inverted and horizontal. Is there any version I am better
off using
barefoot?

Vinnie S.

On Thu, 13 Jan 2005 11:50:35 -0500, Vinnie S.
wrote in :

Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I
noticed there are numerous versions. The vertical is out for obvious reasons. So
there are inverted and horizontal. Is there any version I am better off using
barefoot?

Vinnie S.


Barefoot or not, an attic is probably the worst place to put an
antenna. You have all kinds of possible problems, not the least of
which is house wiring or foil-backed insulation that can cause
reflections (high SWR).

There is also the issue of polarity. Almost all mobile CB antennas are
vertical so don't expect strong signals from a horizontal antenna, or
even an inverted-V which is largely horizontal. You might get some
skip but that depends a lot on the position of the antenna -- you
might have to rotate your house to align yourself with the traffic.

I would think your best solution is to buy a cheap antenna tuner and
load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum
siding, chain-link fence, steel shed..... whatever works best.






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On Thu, 13 Jan 2005 11:50:35 -0500 Vinnie S. wrote:

Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic,
I
noticed there are numerous versions. The vertical is out for obvious
reasons. So
there are inverted and horizontal. Is there any version I am better off
using
barefoot?

Vinnie S.

How about a fiberglass marine antenna which requires no ground plane?

Or just as well, a 4ft fiberglass with a piece of metal for the ground
effect.
Being indoors or out, makes little difference.
It's what is covering the antenna that makes the difference.

On Thu, 13 Jan 2005 16:56:41 -0800, Frank Gilliland
wrote:

On Thu, 13 Jan 2005 11:50:35 -0500, Vinnie S.
wrote in :

Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I
noticed there are numerous versions. The vertical is out for obvious reasons. So
there are inverted and horizontal. Is there any version I am better off using
barefoot?

Vinnie S.


Barefoot or not, an attic is probably the worst place to put an
antenna. You have all kinds of possible problems, not the least of
which is house wiring or foil-backed insulation that can cause
reflections (high SWR).

Only one AC romex wire going thru. No foil on insulation. Standard rafter and
plywood sheating.

There is also the issue of polarity. Almost all mobile CB antennas are
vertical so don't expect strong signals from a horizontal antenna, or
even an inverted-V which is largely horizontal. You might get some
skip but that depends a lot on the position of the antenna -- you
might have to rotate your house to align yourself with the traffic.

I would think your best solution is to buy a cheap antenna tuner and
load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum
siding, chain-link fence, steel shed..... whatever works best.



I am going to have to think about this. I really wanted a temporary solution
until I can hand one on the tree.

Vinnie S.

On Thu, 13 Jan 2005 18:58:40 -0600, "Richard" wrote:

On Thu, 13 Jan 2005 11:50:35 -0500 Vinnie S. wrote:

Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic,
I
noticed there are numerous versions. The vertical is out for obvious
reasons. So
there are inverted and horizontal. Is there any version I am better off
using
barefoot?

Vinnie S.

How about a fiberglass marine antenna which requires no ground plane?

Or just as well, a 4ft fiberglass with a piece of metal for the ground
effect.
Being indoors or out, makes little difference.
It's what is covering the antenna that makes the difference.


Well, there is this. Essentially, it's a 5 foot 5/8 wave Firestik, but the
radials are rather short 30". Shouldn't the be like 9ft?

http://www.firestik.com/Catalog/IBA5.htm

Again, I only want this for a temporary solution.

Vinnie S.

On 13 Jan 2005 16:54:29 -0800, "Professor" wrote:

My recommendation is that you don't put the dipole in the attic. The
dipole is a great antenna but any antenna will take severe losses
trying to penetrate the solid walls of the attic. You will get the best
performance for everyday talking is with the dipole vertical... and in
free space.

Professor
www.telstar-electronics.com


What if I do this up a tree, instead of a 5/8 GP. Mind you, I will need about
100-150 of coax to run it to the tree.

Vinnie S.

On Thu, 13 Jan 2005 16:56:41 -0800, Frank Gilliland
wrote:

On Thu, 13 Jan 2005 11:50:35 -0500, Vinnie S.
wrote in :

Hi. If I want to talk abrefoot and run a dipole for 27 MHz in my attic, I
noticed there are numerous versions. The vertical is out for obvious reasons. So
there are inverted and horizontal. Is there any version I am better off using
barefoot?

Vinnie S.


Barefoot or not, an attic is probably the worst place to put an
antenna. You have all kinds of possible problems, not the least of
which is house wiring or foil-backed insulation that can cause
reflections (high SWR).

There is also the issue of polarity. Almost all mobile CB antennas are
vertical so don't expect strong signals from a horizontal antenna, or
even an inverted-V which is largely horizontal. You might get some
skip but that depends a lot on the position of the antenna -- you
might have to rotate your house to align yourself with the traffic.

I would think your best solution is to buy a cheap antenna tuner and
load up the flag pole, rain gutter, drip-strip, sewer vent, aluminum
siding, chain-link fence, steel shed..... whatever works best.


Vinnie;
You said you lived on a ranch? Use Franks tuner idea, run a wire
out the window and tie the other end to a fence post, your wifes
clothes line pole or anything else above eye level.