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A Twin-Lever Ceramic Cartridge

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High fidelity is reaching into millions of American homes, and with it comes the necessity of providing high-quality pickup cartridges suitable for this purpose. The twin-lever ceramic cartridge is designed to meet this need. Advantages of ceramic elements in this type of appliction are described. In the twin-lever cartridge a double-lever arrangement is used to provide low needle mass, high compliance, and efficient coupling. Individual needles are provided for fine-groove and 78-rpm disks, and a cam-operated transport mechanism positions the required needle in the transducer assembly. Especially convenient is the easy needle replacement feature which permits sightless replacement of worn or damaged needles. The new cartridge fits standard mountings and weighs 71/2 grams. The response equals that of many custom-built high-fidelity pickups.

JAES Volume 2 Issue 4 pp. 239-243; October 1954
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AES - Audio Engineering Society