Abstract: An expandable boot employing a bellows for enclosing and protecting an object that changes in dimension. In one embodiment, the boot includes a vent in the form of at least one tube projecting from the boot and open to the atmosphere for the admission or expulsion of air as the bellows is extended or contracted. Preferably, a second tube similar to the first and projecting from the opposite end of the boot permits passage of air through the boot when it is stationary to prevent excess moisture accumulation. The bellows is protected against kinking during its compression by providing that adjacent webs in the pleats of the bellows are asymmetrical.

Abstract: The disclosure relates to a base support for an antenna mounting post and a method of installing the same in the ground. In one preferred embodiment the base support comprises two clamping members which may be positioned and secured about the outside diameter of a post after the post has been inserted into the ground to the appropriate depth. Each of the clamping members includes a pair of angularly adjustable guides each adapted to receive and support a rod that is driven into the ground to provide stabilizing support for the post. The angularly adjustable guides allow the rods to be driven into the ground at a variety of angles and, in the event an obstruction such as a rock is encountered while driving the rod, the rod may be withdrawn, the angle of the guide altered, and the rod reinserted into the guide and driven into the ground once again.