[Antennas] Multiband Vertical Versus Multiband Dipole (HF)

[Linden, Mike (BRC-Hes)]

  A lot of folks still say that a vertical radiates equally poorly in all
directions (they should only be used if you don't have space for a "real"
antenna). After researching it a bit, it is my contention that such
verticals don't have an adequate ground system or are being used in areas
with poor ground conductivity. My goal is to have some sort of support for
most of the bands between 10 and 80 meters.

  I'm currently running a homebrew multiband coaxial trap dipole in my attic
at about 25 feet. However, I'm thinking ahead to when I have enough time and
when I can convince my housing association to let me install some outdoor
antennas. My two HF options would be a multiband vertical (I like the
Butternut HF9V) or a multiband dipole (I've seen some designs that only add
significant loading on the lowest bands).

  Personally, from an aesthetic point of view, I like the vertical. I would
be able to install it more than 30 feet from my 2-story vinyl sided house
and would have enough room for 30 foot radials in all directions. The
antenna would be ground mounted. Ground conductivity in my area (far west
Chicago suburbs) is quite good. My primary concern with the vertical would
be increased noise due to vertical polarization. Any comments on how
manageable the increased noise is and how much worse it is than a dipole?
Based on my research, the primary benefit of a vertical is the low angle of
radiation that results when used with a good ground system.

  The dipole installation would not be as aesthetically pleasing as the
vertical (at least from my perspective -- hi!). Due to the lack of older
trees in my new subdivision and the layout of my lot, the dipole would have
to run from my house straight into the back yard such that the feed point
would drop in my back yard 30 or 40 feed from my house. Probably the best
height I would be able to manage would be about 30 feet above ground --
perhaps a bit lower at the far end -- I would also need to come up with some
sort of middle support. Based in my research, the benefit of the dipole
would be lower cost (about $100) and lower noise level. However, at 30 feet,
the angle of radiation would not be very good for DX.

  I'd appreciate feedback from folks who have had the chance to compare the
performance of multiband verticals with multiband dipoles.

  Thanks, Michael N9BDF