[Antennas] question regarding dipole

[Mark]

Your idea Joe, is not 1/2 bad.. but don't staple to the wood .. go to a
local feed store and buy some electric fence insulators, if you HAVE to have
the waaaarrrrrr attached to the deck... Mark, AA6DX
----- Original Message -----
From: "Don Havlicek" <n8de@thepoint.net>
To: <joefalcone@chartermi.net>
Cc: <antennas@mailman.qth.net>
Sent: Monday, March 18, 2002 2:32 PM
Subject: Re: [Antennas] question regarding dipole


> Joe,
> Is there any way to run the dipole straight across the length of the
> deck, and then drop the ends down to make the entire length 1/2-wave?
> That would work a lot better than 'lumping' parts of the wire.  Each of
> those 'lumps' is an inductance that would change the center frequency
> and bandwidth of the antenna.
> If you have 40' of deck length, that would mean you would have about 13'
> 'hanging down' at each end .. maybe you could even tie them at some
> angle OUTWARD from the deck, putting the entire antenna at about the
> same relative height.
> Just my thoughts  .. shortened antennas are not as efficient as
> full-sized antennas.
> Don - N8DE
>
> Joe Falcone wrote:
> >
> > Hello:  I want to run a dipole for 40 meters, 33 feet for each leg,
under my second story deck.  I was  going to use insulated wire and staple
the wire to the underside of
> > the
> > supports of the deck. Purpose of the antenna is just to hook up to when
I am on the deck to work some  100 watt CW.
> >
> > I am going to fit the 66 feet of dipole into 40 feet by simply running
the wire in a pattern like this  _|~~|__|~~|________ center
__________|~~|__|~~|__   You get the
> > picture.  (I made the top lines wavy only because I did not know how to
type them straight.  The wire  will run in straight lines).
> >
> > My question is:  Is there some type of rough rule of thumb on changing
the lenght of the wire if you are  going to shorten the total lenght of the
area that the dipole is going
> > to fit into, or doesn't it matter?  Would I still use the 33 feet?  This
antenna will be up about 8 feet  from the ground, but the land slopes away
from the house.
> >
> > Thanks, Joe. N8TI
> >
> > - - -