[SCCC] 160M residential lot antenna

[Bob Selbrede, K6ZZ]

Tim,

Try shorting the center conductor to the shield on your 80M
Inv Vee feedline and tune it with your tuner.  Acts somewhat
like a vertical with top loading.  I've heard it works
fairly well although I haven't tried it yet myself.  I'm
sure it's better than loading up the XM-240.

Another option.  You have plenty of top loading, so a
shortened 1/4 sloper is also an idea.  Build one or try the
Alpha Delta DX-A.  It works pretty good if you have plenty
of top loading and a good ground path down the tower. 
Attach a braided stainless steel strap or similar to your
mast and to a tower leg above the rotator.  That ensure a
good connection to the top loading.  Since you are using a
crankup, you may want to drop a ground line down the side
(or inside) the tower from the top to the ground system at
the bottom as well to ensure you have a good path to ground.
 You could shunt load the tower as well, but to really do it
right, you would need to run all your feedlines and other
cables through the inside of the tower which is a pain.   

73, Bob K6ZZ

----- Original Message Follows -----
From: "Coker, Timothy J" <TJCoker at lasd.org>
To: <sccc at contesting.com>
Subject: [SCCC] 160M residential lot antenna
Date: Tue, 1 Feb 2011 07:57:34 -0800

> Are there any antenna gurus on the list that wouldn't mind
> helping me develop a 160m antenna for my place? The last
> time I asked about 80m I got lots of great ideas and
> encouragement which led me to build a full size inverted-v
> , with folded ends. Sometimes it takes me asking a
> question and getting ideas to do what should have been
> obvious to me in the first place.
>  
> I can provide a .pdf copy of my yard and antenna
> installation, measurements, photos, BBQ dinner, beer,
> etc...
>  
> I want to do better than my XM240 2 element yagi for 160m.
>  
> I have a 55' crank up with C31XR, A3WS, XM240, and 80m
> inverted-v now. My wife isn't yelling yet about all the
> aluminum and wire... so I better get something up before
> she starts to challenge the visual impact...
>  
> The tower is 4 feet from my house and surrounded by
> concrete. I do have the ability to run some radials
> through a 1/4" cut in my concrete to my grass (a 60'
> north-south x 15' east-west rectangle) 10' to the west of
> my tower. My backyard / house portion of the property is
> 75' wide by 75' long (I don't want to push the wife too
> much by running aerial wires over the front yard).
>  
> Pictures of the qth are on a link from my QRZ bio.
>  
> I'm not in a huge hurry, but I have lots of wire, coax,
> and 50' of fiberglass push up mast that can be used.
>  
> 73,
>  
> Tim / N6WIN.
> _______________________________________________
> SCCC mailing list
> SCCC at contesting.com
> http://lists.contesting.com/mailman/listinfo/sccc