After facing financial difficulties, the Collins Radio Company was purchased by Rockwell International in 1973. In 2001 the avionics division of Rockwell International was spun off to form the current Rockwell Collins, Inc., retaining its name. Rockwell Collins is highly concentrated in the defense and commercial avionics markets and no longer markets receivers to the public. The Collins mechanical filter is still in production and does, however, find consumer and commercial use. In 1936, Collins had begun production of the 12H audio console, 12X portable field announcers box, the 300E and 300F broadcast transmitters. Throughout World War II, the 212A1 and 212B1 replaced the 12H design. Collins became the principal supplier of radio and navigation equipment used in the military, where uncompromising performance was required.
