[South Florida DX Association] Wire antenna advice

Warren Rothberg w4wr at bellsouth.net
Wed May 14 14:56:02 EDT 2008


Good afternoon, Mr. Phelps. Your mission (oops, wrong forum). Seriously, =
the
diagram below depicts the "end" of my condo unit (looking down from the =
sky)
or the antenna configuration since the wire will run parallel to my unit
walls.

                        |
|
                        | External -> Radio                         |
      22 feet      | Tuner                                           |
22 feet
                        |       |
|
                        ------|--------------------------------
                                |          42 feet
                                ^
                                |
                        Entry through               11 feet above
                        Window with                ground on all
                        MFJ Pass-thru;             three sides -
                        Accepts either              total length      =20
                        Ladder or Coax;            avail: ~86 ft.
                        Locate feedpoint
                        here.

                        Distance from feedpoint to Radio=3D
                        25 feet

I  was thinking in terms of an OCF (off center fed) wire (don't have =
enough
length to call it a Windom <g>). Height above ground is 11 feet on all 3
sides (my roof doesn't go any higher!). The outside walls are stucco on =
a
metal frame (16" joists). The antenna will mount about 6" down from the =
top
of the "side wall" and out about 12" on a standoff. I can feed it with
ladder line and a 4:1 balun (but the run is very short) or coax with a =
1:1
balun. This is all theoretical (read only in my head). Does anyone have =
any
experience with this type of installation? Will the take off angle be =
near
vertical (NVIS)? The feedpoint side faces east with a north leg and a =
south
leg.

Thanks for any thoughts and/or suggestions.
-warren
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5/14/2008
7:49 AM




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