Alfred H. Grebe (1899-1944) was an American inventor, radio engineer, and entrepreneur. He is best known for his contributions to the development of early radio technology, particularly in the field of broadcast equipment manufacturing.

In the 1920s, Grebe began experimenting with radio equipment and soon developed a number of innovations in radio technology. He developed a circuit that allowed for the simultaneous transmission of voice and music over a single radio station, as well as a circuit that improved the sensitivity and selectivity of radio receivers.

In 1924, Grebe founded the A.H. Grebe Radio Company, which manufactured and sold radio equipment, including transmitters and receivers. He also began a radio station, WNYC, which was one of the first in New York City. The station was originally operated by the city, but was later sold to the public.

In addition to his work in radio, Grebe also made important contributions to the field of marine radio communications. He developed a system that allowed ships to communicate with one another and with coastal stations, which greatly improved safety at sea.

Alfred H. Grebe died in 1944, but his contributions to the development of radio technology have had a lasting impact. He helped to pave the way for the growth of radio broadcasting and his innovations in radio equipment manufacturing laid the foundation for the radio industry as it exists today.