SSB A n t e n n a I n t r o d u c ed By Phelps D o d g e - L i t e r a t u r e A v a i l a b le

2-30 MHz, single-sideband marine antenna recently introduced by Phelps Dodge Communications Company is described in new literature now available. The new Model PD-230 is presented as a major design breakthrough that eliminates the need for traps and tuners required by conventional marine antennas now utilized for single-sideband, high-frequency applications. The elimination of traps and tuners is the result of the incorporation of a factory-sealed, impedencecorrecting module in the base of the antenna. This module converts the highly reactive impedence of the radiating element to a nominal 50 ohm impedence at the antenna input connector. Phelps Dodge Communications Company is one of the six operating units of Phelps Dodge Industries, Inc., the manufacturing subsidiary of Phelps Dodge Corporation, which is one of the largest producers of copper in the U.S. For free copies of the PD-230 literature,

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