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ANTENTOP- 02- 2003, # 003

Old computer's PSU


An input resistance vs. frequency


VSWR relative to 50 Ohms vs. frequency



VSWR relative to 75 Ohms vs. frequency



Conclusion for the connection shown in Fig. 1: The autotransformer can be used in a transmission and reception mode on a range of 80 meters while this one loaded to 600 Ohms. (An antenna Beverage


or T2FD can be such a load.) The autotransformer should be used with a 75-Ohm coaxial cable. The maximum of the RF power going to the transformer must be limited to 50 watts.

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