Hugo Gernsback first wrote about television in the December 1909 issue of "Modern Electrics" and had reported on the technical advances in his magazines. By 1925 mechanical scanning television systems were becoming available with resolutions of up to 60 scan lines. These mechanical systems were simple enough that a hobbyist could construct a television receiver. Vladimir K. Zworykin and Philo Farnsworth were developing electronic scanning systems that were the precursors of modern television. These would not be available for another decade.