Wideband chaotic oscillators that operate on new physical principles, namely, using intense turbulent electron flows are studied. Various approaches to generating turbulent electron flows are considered, and the structure of the turbulent electron flow is experimentally investigated. Experimental results for oscillations generated by the suggested wideband microwave sources are reported. The generalization of analytical, numerical, and experimental data has made it possible to develop wideband chaotic oscillators based on commercial travelling-wave tubes.