Abstract: A tower, mast or antenna support construction is provided that is easily swung by one person from an operative, fully upright, antenna-carrying position to a lower maintenance or repair position. It has a normally upright, central mast or column having a member assembly of securely endwise-connected members for, at its upper end, carrying an antenna and/or rotor motor therefor. A supporting frame or leg structure is adapted to be securely imbedded at its lower end in a ground level cement or concrete base to extend upwardly therefrom and swingably carry the column at a mid position therealong. An adjustable counterweight is carried by a hollow lower end portion of the column and is used to provide a substantial center of gravity balance of the column assembly at its swing axis when its antenna and/or rotor are in place, but with the upper end portion of the column assembly provided with a slightly greater effective weight or slight off-balance.