diople help
 

Soon to be new to HF. I need help in choosing a dipole. I want to work
10-80 meters but low on space.....any ideas? help??

On Sun, 15 Feb 2004 07:50:58 GMT, "Steve Trook"
wrote:

Soon to be new to HF. I need help in choosing a dipole. I want to work
10-80 meters but low on space.....any ideas? help??


See the March 2004 QST article on the "classic multi-band dipole."

Also, the ARRL Antenna Handbook will give you a lot of ideas.

bob
k5qwg

Or a vertical with an SGC at the bottom with some counterpoise / earth rods
or an inverted V with an SGC at the centre and wires sloping down to a
few feet off the ground.
Not related to SGC other than as an impressed customer of some time
and have two others to whom I have suggested this who are equally
impressed for an aerial of modest dimensions

Nick

Steve Trook wrote:
Soon to be new to HF. I need help in choosing a dipole. I want to work
10-80 meters but low on space.....any ideas? help??

The G5RV length, 102 feet, will work on 75m-10m fed with ladder-line through
a balanced tuner. Another idea is to put up a 50-66 ft dipole center fed with
ladder-line for 40m-10m. Short the two lines together at the tuner output for
75m. This is called feeding it Marconi style and requires a counterpoise. The
ARRL Antenna Book contains a wealth of information (most of it valid :-).
--
73, Cecil http://www.qsl.net/w5dxp



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I need help in choosing a dipole. I want to work
10-80 meters but low on space.....any ideas? help??


Install the longest and highest dipole which will fit comfortably into your
back yard and feed it preferably via open-wire line, or via 450-ohms
ladder-line.

If very short of length extend the dipole by converting it into an
inverted-U.

Feedline of no particular length. Allow a little exra just in case. Use a
simple choke balun between feedline and tuner.

And you will have the best all-directional, nearly-all-band dipole for your
particular circumstances.

(Myself, I prefer to use an end-fed inverted-L. It allows 160m to be used.)
----
Reg.

A side benefit of the trap dipole is that the traps act as loading coils on
the lower bands, and the antenna will be shorter than a dipole cut for the
lowest frequency. On 80 meters, unless you are talking about CW, ask
yourself if you really want it. Do some listening, and pay attention to what
power people are running. A 10 -40 antenna will be half the size.

Tam/WB2TT
"Bill Turner" wrote in message
...
On Sun, 15 Feb 2004 07:50:58 GMT, "Steve Trook"
wrote:

Soon to be new to HF. I need help in choosing a dipole. I want to work
10-80 meters but low on space.....any ideas? help??


__________________________________________________ _______

If you don't need wide bandwidth, a trap dipole is simple and works
well. I use a W9INN type and am happy with it. 80 meter bandwidth is
pretty narrow, but if you focus on either CW or SSB, not both, it will
do.

If you want to go to a bit more trouble, install separate dipoles for
each band and use a remote switching device such as that made by MFJ.
The dipoles do not have to be straight; the ends can be bent to fit the
area and will do fine.

--
73, Bill W6WRT
QSLs via LoTW

Bob Miller wrote in
:

ARRL Antenna Handbook will give you a lot of ideas.

Is it accessible online? Any link?

--
pzdr. Szynter Krzysztof GG#1027078
mail.to: dygimail(at)poczta(dot)fm
home.site: http://newbie.friko.pl
U WA GA!! jes tem stu den tem :--P

Mr Dygi wrote:

Bob Miller wrote:
ARRL Antenna Handbook will give you a lot of ideas.

Is it accessible online? Any link?

You must think the ARRL is a non-profit organization. :-)

Perhaps, this URL will give you some ideas: http://www.cebik.com/
--
73, Cecil http://www.qsl.net/w5dxp



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Let me take the opportunity.

This web page is THE standard for antenna information
(www.cebik.com.)

This person has made a real contribution to ham radio.
Wish I understood a third of the great knowlege shown
here.

Thank you Mr. Moore.

Phil - N4GWV


Cecil Moore wrote in
:

Mr Dygi wrote:

Bob Miller wrote:
ARRL Antenna Handbook will give you a lot of ideas.

Is it accessible online? Any link?

You must think the ARRL is a non-profit organization. :-)

Perhaps, this URL will give you some ideas: http://www.cebik.com/

Cecil Moore wrote in
:

You must think the ARRL is a non-profit organization. :-)

I am looking for information about building antenna's (the simplest models)
as much as am looking for free downloadable books for newbies.

Perhaps, this URL will give you some ideas: http://www.cebik.com/

Thanks

--
pzdr. Szynter Krzysztof GG#1027078
mail.to: dygimail(at)poczta(dot)fm
home.site: http://newbie.friko.pl
U WA GA!! jes tem stu den tem :--P

Steve, how low on space are you? There are a lot of us out here with our
pet wire antennas, but we can't recommend them unless we know how much room
you've got.

How about this one? Stick a pole up in the center of your roof, as high as
it will stand without guys (probably 10 ft). From there, run two wires down
to either end of the house, then, from the edges of the roof, run the wires
to the far back corners of your yard, then along the fence-top, until the
ends of the wires are about to meet. Feed it with twin lead and a tuner.
It's not a monster, but it will get you on the air, and will work DX, if you
know what you're doing...

- Mike KI6PR
El Rancho R.F., Ca

"Steve Trook" wrote
Soon to be new to HF. I need help in choosing a dipole. I want to work
10-80 meters but low on space.....any ideas? help??

Steve -

This type of antenna works, and can work VERY well.

But Reg left out a very important detail: You will need some
form of wide-range antenna tuner for multi-band operation.

Your rig may have a built-in tuner that will work over at least some
of the frequency range. Another option is to buy a desk-top tuner.
(Life will be simpler if you buy one that is sized to your present and
near-future power requirements.) Yet another option is to implement
a tuner in distributed form using switchable lengths of the same ladder
line you use in your feedline. (This will require some home-brewing
aptitude, and possibly a very tolerant XYL.) There is a strong advocate
of this approach that frequently posts here, and can tell you all about it.
Don't forget you will need to re-tune when you QSY, unless you have
implemented some form of auto-tuner.

For what it's worth, I dealt with a similar situation using W9INN multi-
band dipoles in an inverted vee configuration; and I'd do it again in a
heartbeat. Meanwhile, a friend of mine decided to try the classic vee+
ladder line+tuner approach, and he's been fighting it for a few months now.
He's on his second or third tuner, while I don't even need one. I think
he'd do it "my" way, if he was starting again.

73, Ed