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Recent changes
3 May 2022 – added double loops, bisquare, Johnson Matchbox
8 March 2022 – added Field Day Antenna Selection Guide, multiband dipoles, wire yagis and quads
10 January 2022 – added pattern plots to single-wire NVIS antennas
9 Jan 2022 – updated NVIS and Alternatives to Knots
2 Jan 2022 – added antenna tuner efficiency test, and more tuner descriptions