How to add sound to amateur films (1954)

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If there is no provision for disconnecting the automatic brake, you will have to dismantle part of the trip mechanism yourself. Usually it is a simple matter to remove one or two screws and lift out part of the linkage. purposes. On some players you can do this by means of a small lever provided on the motor board. On others you will have to lift off the turntable plate and, after studying the auto-brake linkage, decide which screw to remove. You may then be able to attach your pointer to the disused radius arm on the pick-up and so avoid adding weight to it. The safest and most accurate pointer is an enlarged shadow of the pick-up head. By carefully positioning a small flashlamp in a blackened hood on the motor board, you can throw a shadow of the pick-up on to a scale in the cabinet lid or along the front of the motor board. This produces a weightless pointer a foot long or more. 30