[South Florida DX Association] Retry: Wire antenna advice

Warren Rothberg w4wr at bellsouth.net
Wed May 14 17:17:48 EDT 2008


Thanks for your response Mike. For the rest of you, here is a retry on the
ascii diagram.

-----Original Message-----
From: Michael Ryan
Warren, ( Mr. Phelps here...) [snip]

-----Original Message-----
From: fcg-bounces at kkn.net [mailto:fcg-bounces at kkn.net] On Behalf Of Warren
Rothberg
Sent: Wednesday, May 14, 2008 2:56 PM
To: 'Florida Contest Group'; SFDXA

Good afternoon, Mr. Phelps. Your mission (oops, wrong forum). [snip]

		
                        | 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       
                        Ladder or Coax;            avail: ~86 ft.
                        Locate feedpoint
                        here.

                        Distance from feedpoint to Radio=
                        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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7:49 AM




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