Block 0 of A232 E.A.T. project description (Q23990)

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Block 0 of A232 E.A.T. project description
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English
Block 0 of A232 E.A.T. project description
Block 0 of A232 E.A.T. project description

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    TENNIS RACKETS FOR "OPEN SCORE" {Open Score} A CRYSTAL-CONTROLLED FM TRANSMITTER WAS BUILT TO FIT INSIDE THE HANDLE OF THE TENNIS RACKETS. A CONTACT MICROPHONE ON THE RACKET PICKS UP THE SOUND OF THE BALL HITTING THE RACKET. THE SOUND IS BROADCAST TO A RECEIVER OUTSIDE THE TENNIS COURT AND FED INTO THE SPEAKER SYSTEM. THE FM TRANSMITTERS HAVE 10 mW OUTPUT AND OPERATE AROUND 90 Mc. ARTIS...
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