Nuradi, how about halfwave sloping dipoles hung digonally from the top of
the building? Some 30 years ago at YU1EXY we had contest shack at top of
60m tall building with student's dormitory. In spite the building was in
the middle of city noise, sloping dipoles played extremely well. Later we
replaced sloping dipoles with sloped yagis for 80m (3 el toward NW (USA)
and 2 el toward NE (Japan). With halfwave sloping dipole we managed to
QSO KH6 on 160m, very though contact from this part of Europe. Maybe
building acted as kind of reflector on this band...
73, Mirko, S57AD
2015-08-08 1:52 GMT+02:00 Nuradi <yb0unc@gmail.com>:
> Dear all,
>
> In preparation of this coming WW big contest, I plan to install wire
> antenna
> on a roof top of a 33rd storey building (about 110metres above the ground)
> for operating on the 160M, 80M and 40M band.
>
>
>
> The building roof top rectangular size about 45 metres long (from
> NWtoN-326.8 degress to SEtoS-146.8degrees) and 33 metres wide
> (fromNEtoE-56.8 degrees to SWtoW-236.8 degrees) located in centre of
> Jakarta
> city.
>
>
>
> The roof top have plenty of cellulair microwave operator antennas
> (operating
> in 5GHz and above ALSO one TV operator with around 400MHz working freq.)
> and
> there are also two SelfSupportingTower-15metres high, on each end of the
> long side of the building.
>
> There is also one-SST belong to theTV operator which is about 50 metres
> high, located on the SE end of the roof top.
>
> Good grounding terminal is available as it's used for grounding all the
> communication antennas/equipments.
>
> I have my own room in the centre of the roof top where we put all our
> indoor
> microwave devices and routers/switch.
>
>
>
> Prefereable wire antenna is lazy 'laying'H or quad, dipole, slope..
>
> I appreciate verymuch any suggestion, input from all, regarding the best
> wire antenna for this site to be used in the 160M, 80M and 40M band.
>
>
>
>
>
> Thankyou very much indeed in advance.
>
>
>
> Regards,
>
> Nuradi, YB0UNC / KU2B
>
> Cellulair +62811138378
>
>
>
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
>
>
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|