Subj : End-Fed vs End-Fed Half Wave
To   : Thom LaCosta-BSM
From : Mike Miller
Date : Wed Dec 21 2022 03:30 pm


Hello Thom!

27 Nov 22 13:30, you wrote to all:

 TB> OK...I'll admit my ignorance....Trying to wrap my head around using an
 TB> endfed wire versus an endfed half wave dipole.  If I understand things
 TB> correctly, the half wave is a resonant antenna and the simple end-fed
 TB> is not.  will both of them require use of a choke to minimize rf in
 TB> the shack?  I would like to be able to operate multiple bands and make
 TB> use of the antenna tuner and an artificial ground if that will help.
 TB> Power levels < 100 watts.  Thanks, Thom K3HRN

 Thom,

 I use an End-Fed Halfwave.  It requres an RF matching transformer (usually 
64:1) in order to match impedence.  My antenna is 135' long, and is resonant on 
80/40/30/20/17/15/12/10m

I do have an RF choke outside the entry point to my house as well, and it 
reduces RF a bit.  I've never had an issue with RF in the shack (rf burns when 
touching metal surfaces),  but I do have issues with various electronic devices 
in my house going haywire when I transmit on certain bands.

A regular "end fed" wire usually requires an antenna tuner that can tune a 
"random length wire"  Such a wire is not resonant on any band, and people say 
it does not perform as well as the end-fed halfwave (I've never tried it, so I 
can't give an opinion).


I love my end-fed halfwave, I've made contacts all over the world with it 
running no more than 100w.

Mike


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