[Elecraft] Antenna choices

[Walter Underwood]

Rig them as inverted vee antennas with the center at the tower.  --wunder, K6WRU

On May 25, 2014, at 6:14 PM, Joshua Gould <jg.k8wxa at gmail.com> wrote:

> The problem with any wire antennas, (as you can see on this map https://goo.gl/maps/MFdXQ) is a complete lack of places to attach the ends of the dipole to...  The property is long and thin, but is also very open... The only trees are at the back of the property, and would be hard to climb.  Per the Landlord (not the XYL,) I am not allowed to attach anything to the house...
> 
> Joshua Gould
> K8WXA
> 
> 
> On Sun, May 25, 2014 at 8:56 PM, Walter Underwood <wunder at wunderwood.org> wrote:
> That is several very big questions, and enough that I suggest getting a copy of the ARRL Antenna Book and reading before spending much money. And talking to a lot of hams that already have towers.
> 
> Multi-band Yagi antennas are multi-band, but not wideband. They are tuned for specific bands, like 20m or 15m. They do not work well on bands they are not designed for.
> 
> A vertical on a tower might give a few dB of gain (on the bands it is designed for). A Yagi (beam) will typically give 10dB or so of gain on each band it is designed for.
> 
> The G5RV works for a lot of people, but it is a compromise on many bands, and could cause problems when run with high power (500W).
> 
> Since you are going to the bother of putting up a tower, I'd also put up dipoles cut for most of the lower bands and feed them from a common point. This is called a fan dipole or parallel dipole. If you'd like that pre-cut for you, I recommend Hy-Power Antenna (http://www.hypowerantenna.com/).
> 
> wunder
> K6WRU
> http://observer.wunderwood.org/
> 
> On May 25, 2014, at 5:31 PM, Joshua Gould <jg.k8wxa at gmail.com> wrote:
> 
> > Ok, I know that this is a topic much like the Ford vs. Chevy debates or the
> > Android vs. Apple debates, but I do have a few questions...
> >
> > I am going to be acquiring a 56 foot Rohn BX tower.  I already have a G5RV
> > that I am planning on putting up (still not sure where I'm going to attach
> > the other end of it to, One end will go on the tower.) I'm going to put up
> > a 2m/440 vertical at some point up near the top of the tower.  I keep
> > throwing around an HF vertical or a beam.  The verticals seem to cover more
> > bands, but the beams are directional.  (Would also need a rotor,..
> >
> > Can a multi band yagi be tuned to a different band, or will it only work on
> > the bands that it's designed for?
> >
> > I'm thinking long term and I'll probably be adding a K3/100 with a KPA500
> > to the mix in the next year or so...  Trying to figure out what will give
> > me the best bang for my buck, so to speak.
> >
> > 73,
> > Joshua Gould
> > K8WXA
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> --
> Walter Underwood
> wunder at wunderwood.org
> 
> 
> 
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--
Walter Underwood
wunder at wunderwood.org