Abstract
A new crystal channel filter for use in broad band carrier telephone systems is described. It requires less than two-thirds as much mounting space as the earlier design and savings in materials and manufacturing effort are realized. These savings were made possible by assembling the four crystal units in one lattice-type filter section rather than two, resulting in a reduction in the number of component coils and capacitors.
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More From: Transactions of the American Institute of Electrical Engineers
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