High Speed Duplication of Magnetic Tape Recordings

The high speed duplication of previously recorded magnetic tapes has made the tape radio network practical. For example, each of the two major radio networks in Mexico duplicates over 19,000 seven inch reels of taped programs per month for their several hundred affiliated stations. Since the tapes are erasable and wire program circuits are seldom used, these networks operate very economically, and the quality of their recorded programs is unimpaired by losses in transmission.