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Old July 15th 07, 07:43 PM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Apr 2007
Posts: 7
Default extended double zepp


"Walter Maxwell" wrote in message
...
On Sun, 15 Jul 2007 15:53:48 GMT, "Amerigo Vespucci"
wrote:

snip
The way I understood it was the best way to feed it was with ladderline or
something equal to it. I looked at the wireman website and saw their 450
ohm
ladderline is only like 26 cents a foot so I'll order 80 feet of it and
send
the antenna up higher and take it from there. The reason I built the EDZ
is
it has 3 db over a dipole and it will also work for other bands with a
tuner.Another reason I made the EDZ is a real estate issue(lacking) so
something monsterous would be out of the question, but hey that's what
makes
ameteur radio such a great hobby,the experimentation that goes along with
it.

Hi Amerigo,

The transmission line you constucted should work just fine--don't go
buying any more line, because the
difference will be insignificant.


I tried pruning the antenna a couple of inches and fiddled with the feeder
line and manged to get mr SWR's down below two but with a tuner I'm still
not happy. My rig is a Kenwood TS 530S so the finals are a little more
forgiving but I still wanna mess with it some more when the weather cools a
bit.
Thnks all for you help I'll update you later on with whatever progress I
get.



And another point you should be aware of is that the 3dB improvement using
the EDZ is only in the direction at
right angles to the antenna, because the broadside lobe of the EDZ is
somewhat narrower than that of the 1/2
wave dipole, and as a result, the gain in all other directions is LESS
than that of the 1/2 wave dipole.

Walt, W2DU





 
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