[Boatanchors] Antenna Question...

Bry Carling bcarling at cfl.rr.com
Sat Mar 30 16:48:45 EDT 2013


Brains trust I need your advice.

I have three possible scenarios for an end-fed antenna for my station. 
I had tried a 102 foot dipole with 450 ohm line feeding it - with very little success.

The FT857D / LDG tuner combo doesn't like it, not even on 80m. It will work fairly well on a 
few bands but not many. I think I can do better changing this to an end-fed 120 foot wire. Yes 
it bends around a bit but the main run of about 80 feet is pretty straight - a partly inverted vee 
shape and peaks at 25 feet high, with the ends down around 8 feet high and bent at 90 
degrees.

I have a ground rod outside the window. I can put another one about 12 or 15 feet away 
from the window, run some RG8U, and feed it from there.  I would like to run 100 watts and 
be able to work ALL bands from 160m - 6m which this tuner is capable of doing with the right 
piece(s)  of wire. Is my wire too long? Too short? Is my wire too bent?
Will one of my feeding methods work better than the other two?

So here are my three possibilities. 
1) Just end feed the wire straight off the tuner in the shack. (ths is an indoor only tuner)
2) End feed it against a ground rod outside
3) End-feed it against a counterpoise outside.

Note that for 2 and 3, I would use a short run of coax from the tuner to the base of the 
antenna getting it out there with less RF In the shack.,
My rigs seem to not like any RF in the shack!

Pictures of each scenario are here:
1 - 
http://af4k.com/ENDFED1.jpg
2 - 
http://af4k.com/ENDFED2.jpg
3 - 
http://af4k.com/ENDFED3.jpg

I would really appreciate any of you guys making some comments on what you think will work 
the best.

73 de AF4K - Bry


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