Self Supported

4-Square for 80 / 75 M - Pivot Base -

Design by Eric Smitt K9ES
Base Pivot  

The pivot mount is the most important structure, because it has to sustain the antenna during heavy winds and be mechanically strong enough to allow 1 person lowering and erecting of the antenna.  It is the hinge and pulley arrangement that simplifies installation.

The supports are pressure treated 4 x 4 lumber 8 feet long , mounted 30 inches deep in a hole dug with a fence post digger shovel.  If the soil is not conducive for a fence post digger, find an alternate means.  The pole is sunk in the hole, and the hole is filled with concrete mix from an 80 pound bag of Sacrete.  Before the cement is poured, make certain that the pole is vertical.  Repeat this procedure for the 3 remaining support poles spaced (in my case) 67 feet apart in a square array.  In my arrangement, the poles are oriented with the square aligned with a pole in the NE, NW, SE, and SW direction. Allow the concrete to set before continuing. 
Mount Deatil

The next addition is cutting the 8 foot lengths of pressure treated 2 x 4 into 4 foot lengths.  These are to hold the vertical element.  At the bottom of the 2 x 4, a heavy duty hinge is mounted so that the hinge portion sits evenly on the edge of the 2 x 4 surface.  The hinge is secured to the 2 x 4 by using 2 inch long ¼ inch galvanized lag bolts.  Care must be taken to drill the holes using a 1/8 inch drill bit (1 ½ inches deep), so that the drilled holes are perpendicular to the flat surface of the 2 x 4 bottom, and centered for the 3 holes used to secure the hinge.  Before inserting the lag bolts, surround the bottom of the 2 x 4 with a 2 ¾ - 3 ½ inch hose clamp, mounted ½ inch from the bottom of the 2 x 4, to prevent splitting the 2 x 4 when the lag bolts are installed.  Coat the threads of the lag bolt with quick drying epoxy cement, which has just been mixed.  Any household epoxy cement can be used, provided the mixing is performed using the correct proportion for the glue being used.  Be careful not to touch the un-cured epoxy, as it is hazardous to the skin.  Ensure that the alignment of the hinge is correct because once the glue is set, the lag bolts will be very difficult to remove.  This assembly can be set aside to allow the epoxy to properly cure.   Once the assembly has dried, drill the holes for the 2 ¾ inch U-Bolts 6 inches from the top and bottom of the 2 x 4.  These will clamp the vertical element (and PVC insulating sleeve) to the assembly.
Pulley
At the 4 x 4 post, support the hinge and 2 x 4 assembly 14 inches from the ground, and mark the 3 holes for the hinge on the side of the 4 x 4 which will become the direction from which the long vertical will raise and lower.  In my case, I wanted to avoid potential conflict with the Polyrod guy wire which will be used to guy the future 145 foot tower.  Place a 4 - 5 inch hose clamp 1 inch above and below these holes and drill the holes with a 1/8 inch drill bit (1 ½ inches deep), ensuring that the holes are perpendicular to the surface of the 4 x 4.  Coat the threads of the lag bolt with quick drying epoxy cement, which has just been mixed.  And install the assembly to the 4 x 4, ensuring that the assembly will raise and lower, and align with the 4 x 4 so that it too will be vertical.  Allow the epoxy cement to cure.

Hinge

detail hinge