IT1119593B - Reproducer using four circular coaxial magnetic tracks
- Google Patents
Reproducer using four circular coaxial magnetic tracks
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Publication number
IT1119593B
IT1119593BIT69344/79AIT6934479AIT1119593BIT 1119593 BIT1119593 BIT 1119593BIT 69344/79 AIT69344/79 AIT 69344/79AIT 6934479 AIT6934479 AIT 6934479AIT 1119593 BIT1119593 BIT 1119593B
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Application filed by Shinano Kikaku Co LtdfiledCriticalShinano Kikaku Co Ltd
Priority to IT69344/79ApriorityCriticalpatent/IT1119593B/en
Publication of IT7969344A0publicationCriticalpatent/IT7969344A0/en
Application grantedgrantedCritical
Publication of IT1119593BpublicationCriticalpatent/IT1119593B/en
The magnetic reproducer, e.g. for an educational audio-visual device, has preamplifiers connecting to heads for playback from required portions of a magnetic sheet carrying audio information on one side and visual information on the other, e.g., on four circular tracks each side. The preamplifiers are selectively connected to a main amplifier in an output stage by light sensors includes in the preamplifiers. LEDs are actuable by external action to direct light onto the light sensors of required preamplifiers. The system produces output with high S/N ratio.
IT69344/79A1979-12-061979-12-06Reproducer using four circular coaxial magnetic tracks
IT1119593B
(en)