In 1912 Alfred Grebe was licensed as a wireless operator. He worked for a few years as a ships wireless operator. In 1916 he advertised his first radio, the AGP-101, for sale. In 1920 he established A. H. Grebe & Co. and began manufacturing his line of radios. The CR8 was offered for sale in 1921 for $80. It was a regenerative set covering the frequencies of 150-1000 meters.