Playback & recording equipment
Birmingham Sound Reproducers Ltd DR33C portable disc cutting lathe: cutter head
5 nsa 1993
Birmingham Sound Reproducers Ltd
The cutter head oscilated in sympathy with the electrical current coming from the microphone, and thus cut the lateral groove into the record. Before the development of tape recording, sounds could only be recorded by being cut into discs or cylinders (which were largely obsolete by 1930). The wax blanks were fragile and difficult to transport. In 1934, however, the Englishman Cecil Watts invented a new recording system which meant that robust metal discs could be used. Each disc had a thin ‘acetate’ coating of cellulose nitrate lacquer which was just sufficient to cut the recording. This allowed portable disc cutting lathes to be developed. This model is postwar. Dimensions: Width: 320 mm Height: 500 mm Depth: 400 mm deep.