On Sun, 3 Sep 2006 16:35:52 +0200, "edwin" wrote:

Hi there,
I would like to make a dipole antenna for 11 meters, i have already made a
half wave 2x 2.58 meter but like to try a full
wave antenna 2x 5.17 meters, so far i figured it out is it impossible
because i have to use a balun the say ?.
is there anyone who can help me, or give me a link to make one?
thanks for your help!
Greetings Ed


Ed,

You are collecting the full range of answers here which must be a
little confusing.

It seems that you are talking about horizontally polarised antennas.
That might be a disadvantage if you were working local stations using
vertical polarisation, less a worry for ionospheric paths or where the
other station is also horizontally polarised.

The full wave dipole does have a little gain in some directions, but
understand that power is not created in the antenna, the higher gain
antenna just distributes the energy more in certain directions. The
gain in some direction(s) is at the expense of less gain in other
directions. (BTW, the gain is so little that you are unlikely to
notice it.) Depending on what you want to use it for, the gain /
pattern of a full wave dipole might not be on average better than a
half wave dipole, or an omnidirectional antenna. Indeed, some
omnidirectional vertical antennas might be better for certain
applications.

Richard is right in telling you there is not much in it (though he may
have been a little more emphatic), but centrefeeding a full wave
dipole is a small challenge, but possibly beyond your knowledge and
experience. You can offset the feedpoint, but it is not an ideal
solution either, it that has its disadvantages (skewed pattern, Z50,
feedline coupling because of asymmetry).

If the stuff of antennas is interesting, perhaps you should consider
pursuing an amateur licence?

Owen
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