My first tower installation at the K2ADA Radio Ranch.  The Universal 21-50 is an aluminum 50 ft tower rated at 21 sq ft of wind load.  It is self supporting, and requires a substantial base of concrete: 5’x5’x6′.  The hole was dug by hand, no , not by me.  Caruthers concrete dug the hole and provided the forms and concrete – lots of it.  Here are some photos of the hole, steel base and the first tower section.