Original article from: Wayne Sarosi 
 Reposted by Rob Dennis,Moderator HAM_TECH,for use of the FIDO HAM_TECH echo.
  THIS POST/SERIES NOT TO BE USED IN ANY CDROM COMPILATIONS FOR COMMERCIAL
 SALE WITHOUT EXPRESS WRITTEN PERMISSION OF ORIGINAL AUTHOR(S) OF THIS POST.
               ALL AND ANY COPYRIGHTS RETAINED BY AUTHOR(S).
SUBJECT:  Wire beams, indoor antennas
 For many of us,the antenna is the biggest problem for most hams.
 Hams have to contend with neighbors and the XYL in order to pursue their
hobby. An interesting HF and VHF idea I've seen used is the wire beam.
 The wire beam is unrolled and then suspended in the direction required for
operation. After the operation is complete,the wire beam is rolled up and
stored for the next time. This type of beam is excellent for 10m and up to
1.25 m. You may be able to set up a wire beam for frequencies below 10m if 
ou
have the space to do so.
 This antenna is also excellent for suspension in an attic.
            A simple model is shown below:
                   R             DE         D
    -----------||--|-------------|----------|--||-----------
               ||  |             |          |  ||
               ||  |             |          |  ||
               ||  |             |          |  ||
    -----------||--|-------------|----------|--||-----------
               ||  |             |          |  ||
               ||  |             |          |  ||
               ||  |             |          |  ||
    -----------||--|-------------|----------|--||-----------
 Aside from the elements,the rest of the configuration is non-conductive.
 Wooden dowel supports are outside the ends of the antenna and string/rope 
an
be used to support the elements.
 The wooden dowels are not required if suspension is taught.
 You can see that variations of this set-up can be incorporated to 
ccommodate
most any frequency from 10 to 1.25 meters.
-WS
--- GoldED 2.42.G1219
 Original article from: Wayne Sarosi 
 Reposted by Rob Dennis,Moderator HAM_TECH,for use of the FIDO HAM_TECH echo.
  THIS POST/SERIES NOT TO BE USED IN ANY CDROM COMPILATIONS FOR COMMERCIAL
 SALE WITHOUT EXPRESS WRITTEN PERMISSION OF ORIGINAL AUTHOR(S) OF THIS POST.
               ALL AND ANY COPYRIGHTS RETAINED BY AUTHOR(S).
SUBJECT:  Attic VHF/UHF Rotatables
 In many instances,a ham can mount a VHF or UHF beam in the attic,on a rotor.
 They can achieve good results depending on their location and height off the
ground. Antenna size limitations are soley dependent on the available room in
the attic that allows rotation of the beam without hindering it's rotation.
 To check the attic for the maximum size antenna,the ham must first enter the
attic and measure the distances in the area planned for the set-up.
 Trusses,electrical wiring,air conditioning / heating ducts,and the items 
hat
are stored up there,can all play a factor in the actual antenna size.
 Finding your antenna with a pair of long johns dragging off the front end is
not a pretty sight.
 After measuring the area in the attic,the antenna size and height off the
attic cross members can be accomplished.
 Remember to allow for a base to accommodate the rotor,this too must be
calculated into the system.
 Building a sleek system,to rotate two or three small beams,can be 
ashed,when
the system will not turn because of an oversight in the measured values of 
he
attic area in question.
 Turning radius is the important factor. Each antenna forms a rectangle ABCD
where the maximum distance is AD or BC.
              A------------------------------------B
               |                                  |
               |                                  |
           ----|----------------------------------|---- BOOM
               |                                  |
               |                                  |
              C------------------------------------D
 For horizontal antennas,the turning radius is from the mounting point to the
tip (either side) of the longest element. Multiple this figure by two for the
turning diameter of the antenna.
 For vertical antennas,the truss angle places the biggest problem as the
height from the boom to the tip of the refector (B or A). In essence,this 
ill
shorten your boom length or require a lower rotor mounting.
 These tips will help the Amateur avoid any problem before getting the system
in the attic.
-WS
--- GoldED 2.42.G1219
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