Experimental results obtained with the Jicamarca radar and a new digital processing system during spread F conditions are presented. The data consist of two-dimensional maps showing backscatter power and samples of frequency spectra of the backscatter signals as a function of altitude and time. Almost simultaneous spread F backscatter power and incoherent scatter observations of electron density and vertical drifts are presented for one occasion. It is shown that spread F can occur at the bottomside, at the topside and the steep bottom of the F region, and in the valley between the F and E regions when the electric field is either positive, negative, or null. The existence of plumelike structures extending hundreds of kilometers in altitude and physically connecting the spread F on the topside with the bottomside is one of the highlights of the experimental results. These and other results are discussed and interpreted.