Hi Simon,I would like to suggest hanging a 1 wavelength delta loop off of the
50 meter tower. Easy to build, easy to match, about 1.5 db gain and you don't
need to do all that work laying down radials, etc and trying to match an odd
length tower. The loop will be almost omni directional and it will be bit more
broad banded than a vertical, dipole, etc.
GL es 73, Mike WA5POK
On Friday, September 14, 2018 1:34 PM, Simon Ravnič via Topband
<topband@contesting.com> wrote:
Hi!
With a head full of browsing and researching I decided to ask for help this
Topband think tank.
At S53M contest station we are well organized for 40m & up but are lacking
lower band TX antennas.
There are three towers in direction north - south:
The southern one is 50m high with 40m and 20m monobanders on top
Middle one is located 25m north of previous one and is 25m high with 15m
monobander and 6/4m duobander.
The northern one is 28m north of middle one and is 20m high with Optibeam
OB17-4.
There is a possibility to hang anything between them so I think we would prefer
some wire antennas. Already present on the site is 160m INV-V and 80m vertical
dipole from the 50m tower. What we are looking for is 160m and 80m TX antenna
with two main directions 310 and 45 with low angle radiation.
RX antennas are OK as there are three 280m long terminated beverages, direction
270 (Caribbean), 310 (NA) and 45 (AS).
To understand better see a photo of the location at
https://www.dropbox.com/s/bk44cg2zfyzpw3w/S53M.JPG?dl=0
or
https://ibb.co/gRPGVU
Thanks you for your idea & 73
Simon, S53ZO
S53M team
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