Abstract: An antenna mounting platform for mounting at selectable positions along the length of a monopole tower comprises a frame having an interior opening for receiving the monopole, a bracket mounted to the frame and extending to the interior opening and means for selectively (1) forcing the bracket against the monopole and holding the mounting platform on a location on the monopole, and alternatively, (2) releasing the bracket from against the monopole so that the mounting platform is movable along the length of the monopole. Desirably, the antenna mounting platform comprises a plurality of connecting members corresponding to the number of brackets for connecting the brackets. Each connecting member connects adjacent brackets and is operable to selectively compress associated first and second outriggers together and thereby force the brackets against the monopole, and alternatively, decompress the associated first and second outriggers and thereby release the brackets from against the monopole.