Re: Topband: [Bulk] Best wire antenna for roof top location

[Grant Saviers <grants2@pacbell.net>]

Have you surveyed the site for HF RFI?  One mountain top property I was 
considering had awesome 360d unlimited visibility but had so much power 
supply hash, PIM, intermod, etc. from comm installations that any 
amateur operation would be near impossible.  My spectrum analyzer showed 
huge amounts of general hash RF that could not be high pass band 
filtered out.
Grant KZ1W

On 8/7/2015 16:52 PM, Nuradi wrote:
> 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
>
>   
>
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