Topband: Options for a Condo

[Herb Schoenbohm]

On 9/7/2011 6:28 AM, Nand Kishore wrote:
> Hi All,
>            This my first post here. I live on the top floor of a 14 storey
> building.
> Got a 3el Steppir with 30/40m addon approx. 40' above my roof. There is
> a 80m dipole center suspended from rotor base .
>
> This 80m dipole is broad sided in NW/SE direction. I have managed to work
> ZL8X ,VP8ORK on cw and VE7CC on RTTY. The 80m dipole is approx.fullsize.
>
>
Nandu,

Since you already have a full size 80 meter dipole and since your height 
above ground is good I would suggest you insert a pair of Unadilla KW-80 
traps in that dipole.  You will need to lengthen the ends to make it 
work on 160 but if that is a problem you can zig zag or right angle fold 
the far ends a bit to make it fit on your roof.  These traps have a 
resonant frequency of 3.625 Mhz so there should not be any negative 
impact on the 80 meter performance you currently have. I would presume 
you are in an urban environment so receiving is always a challenge on 
160.  But the dipole would be a much better bet than any vertical under 
those circumstance.


Good luck...I still need VU2 on 160 even though I have VU7!


73,


Herb, KV4FZ