Disk record reproducing equipment; directives for measurements, markings and audio frequency connections, dimensions of interchangeable pickups, requirements of play back amplifiers— 4 стр.
Magnetic tape sound recording and reproducing system; methods of measuring the characteristics of recording and reproducing equipment for sound an magnetic tape; identical with IEC 60094-3:1979 (status as of 1988)
Tape recorder for recording on magnetic tape with <(hoch)1>/<(Index)4><Zoll> width, for professional use; mechanical and electrical specifications— 4 стр.