[Antennas] Elementary Antenna Question

[Billy Cox]

That is only true at ~ 0.5w height ... 
otherwise it varies + or - too.

<as in how many folks really have their
80/75m dipole antenna up 0.5w today>

And then there's interactions with other
metal objects, intended and otherwise.

75 ohm Z is a textbook starting point only.

73 de Billy, AA4NU

-----Original Message-----
>From: Chris Boone <Cboone at earthlink.net>
>Sent: Oct 2, 2009 11:00 AM
>To: antennas at mailman.qth.net
>Subject: Re: [Antennas] Elementary Antenna Question
>
>Remember, a 1/2wl dipole by design is NOT 50 ohms...it is 75 ohms Z.....and
>if resonant, would be 75 ohm RESISTIVE..
>To cut a dipole where it is 1:1 at 50 ohms means the antenna is NO longer
>1/2wl...but IS 50 ohms resonant..If you WANT a true 1/2wl dipole, you WILL
>see a 1.4:1 SWR at the lowest point.
>
>"You canna change the laws of physics" - Capt Montgomery Scott
>
>Chris
>WB5ITT
>
>> -----Original Message-----
>> 
>> >>Basically why does the antenna resistance(50 ohms) does not correspond
>> >>with
>> the SWR dip?