//base for a 2m ground plane (GP) antenna
//JP Hare, 24 Oct. 5th 2014, version 1.1

//ca. 3 1/2 hours print time on Ormerod

//move everying to near center
translate ([-70,0,0])
{

//mounting bracket / base
difference () {
cube([140,70,4]);

//4 U-bolt holes
translate ([50,13.5,-1])
cylinder (h=10, r=5, $fn=60);
translate ([50,56.5,-1])
cylinder (h=10, r=5, $fn=60);
translate ([120,56.5,-1])
cylinder (h=10, r=5, $fn=60);
translate ([120,13.5,-1])
cylinder (h=10, r=5, $fn=60);

//10 x 2 mm slot for second thin Al sheet radial 
translate ([17,9,-1])
cube([2.5,11,8]);
}

//radiator and GP holder box
difference () {
//main box
translate ([0,20,0])
cube([42,30,35]);

//cut out inner of box
translate ([20,25,5])
cube([18,20,40]);

//hole for radiator
translate ([-1,35,10])
rotate ([0,90,0])
cylinder (h=25, r=4, $fn=30);

//hole for coax
translate ([30,35,7])
rotate ([0,90,0])
cylinder (h=20, r=3, $fn=30);

//screw hole for reflector and screw driver
translate ([10,35,25])
rotate ([0,90,0])
cylinder (h=20, r=1.5, $fn=30);

//hole in side of box so 
//the screw driver can get to screw!
translate ([35,35,25])
rotate ([0,90,0])
cylinder (h=20, r=3, $fn=30);

//radiator screw hole
translate ([25,35,-1])
cylinder (h=10, r=1, $fn=60);

//two 10 x 2 mm slots for thin Al sheet radial 
//can do with one long command
translate ([20,18,20])
cube([2.5,50,11]);
}

difference () {
//support pillor for 2 x radial bolt
translate ([20,10,0])
cube([15,10,15]);

//bolt hole
translate ([20,15,10])
rotate ([0,90,0])
cylinder (h=20, r=1.8, $fn=30);
}

//extra stength to right hand side
translate ([20,50,0])
cube([15,10,15]);

}