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ANTENTOP- 01- 2005, # 007

Building Antennas



Figure 3 Direct feed WHAS


Usually the antenna can be matched at most of amateur HF bands. For better work the WHAS install ferrite rings (5- 20 ring with any permeability) at two ends of the coaxial cable going from TX to ATU.




At my experimenters with WHAS I have used ATUs and "Artificial Ground" described in reference [1].




1. Igor Grigorov. Antennas. Matching and Adjustment.- Moscow. RadioSoft, 2002. ISBN 5-93037- 087-7



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