LOG-YAGI.EXE version 1.6
                           Copyright (c) 1985 - 1993

                             Holger Granholm, OH0NC
                                Norragatan 7 A 3
                               SF-22100 Mariehamn
                                   (Finland)

                             Phone: (358)-28-13068
                            BBS: (358)-28-13068,,63


          Legal:

          THIS IS NOT FREE SOFTWARE! IT IS BEEING DISTRIBUTED ON THE 
          SHAREWARE BASIS. IF YOU USE THIS SOFTWARE, THEN YOU ARE EX- 
          PECTED TO REGISTER IT WITH THE AUTHOR. THE $ 10.00 REGISTRA- 
          TION SHOULD BE MAILED TO THE ABOVE ADDRESS. REGISTRATION 
          WILL COVER THIS VERSION AND ALL FUTURE UPGRADES.

          HELP SUPPORT SHAREWARE AUTHORS!!!!

          Changes:

          v1.0

          The program was first created in 1985 on a CP/M computer.

          v1.2

          1986 it was updated with material from QST 12/1986.

          v1.4

          1988 it was ported to an IBM compatible computer.

          v1.6

          The program is ripe, and has not needed any upgrades as far as the
          original concept is concerned, (the author hates to re-invent the
          wheel). The only changes that have been made are concerned with the
          User Interface. The latest change to the interface only makes it
          look nicer.

          ===================================================================

          Overview:

          The "Swan Yagi" was invented by Oliver Swan, W6KZK and described
          by Ed Tilton, W1HDQ in QST 10/69. The use of several driven ele-
          ments is an efficient way of getting optimum phasing of currents
          in the antenna for high gain and clean pattern. The broader band-
          width as compared to a conventional yagi is an additional plus.

          The result of the experiments and measurements done by me, show
          that the Swan antenna does outperform conventional Yagi's with
          the same boomlength.

          My measurements show uniform gain from 144 to 145 MHz and a much
          cleaner pattern than could be obtained with a conventional Yagi
          with the same boomlength. The gain was down 1.5 dB at 146 MHz,
          but the radiation pattern and the SWR were still very good.

          The referred to articles are recommended for more details.