[Antennas] 248ft dipole

[Chris BONDE]

 From my limited knowledge, it would be a por radiator.  Comments 
interspersed, but, compare with others.
Chris opr VE7HCB

At 01:58 AM 2002-04-21 -0400, you wrote:
>I dont know exactly what one would call this antenna but i have a 248ft
>dipole which is about 20ft of the ground at the feedpoint and the ends are
>60 ft high.

Most of the radiation takes place in about 1/3 of the antenna, where the 
current is high, near to the centre of a dipole.  So you might be losing 
here.  That is why an "inverted" V is popular.

>In addition to this, the angle of the ends is 90 degrees apart.

There is a thing called a sloping V, but the centre is high and the ends 
are terminated and feed with 300ohm line.

>So you name what  i have here. It is fed with 300 ohm tv twinlead. I tune it
>with a roller inductor tuner and use it on 160-10 meters.

One roller inductor?  On this type of antenna I think that one for each 
line would be better.


>I have heard that the feedline should and/or should not radiate. The length
>of the present feedline is around 60 ft and it does radiate. So what is it?
>Should or should not? How do i know the antenna is efficient? And the april
>issue of Qst talked about horizontal loop antennas which got me to thinking
>that maybe this is the way to go instead of this present antenna system.

If you are not worried about so called gain in a certain directions of 
front to back ration, who cares if the feed line radiates?  I had an 
inverted V that I am sure the coax radiated.  Just keept up a wave length 
high so that it would radiate to complement the antenna.  Coax was at right 
angles to the antenna.


>Your comments would be appreciated. Thanks in advance and please post to the
>reflector along with personal emails.
>
>john
OK so I posted to the reflector as well.  This is just my humble opinion.

Chris opr VE7HCB