
        
                                Appendix 6D
        
                     Electromagnetic Field Animations
        
        Animations of the electromagnetic fields in the near
        field, in and around an antenna, are intended to help
        with visualization -- to see how an antenna works.
        
        The animations are presented as a Powerpoint slide show,
        with many of the slides containing looping animations.
        They are intended to be viewed with a web browser.
        
        Two versions are available for download: APP6D_IE5.ZIP,
        for Internet Explorer version 5 or later, and
        APP6D_ALL.ZIP, for all other browsers.  The latter
        displays the animations at lower resolution and quality,
        so the IE5 version is preferable.  Both are really large
        files, upwards of 10 Megabytes.
        
        After downloading, extract all the files from the .ZIP
        file; WinZip will automatically put all the files except
        APP6D_IE5.HTM or APP6D_ALL.HTM in a subdirectory
        (folder).  Opening the .HTM file in a browser will start
        the show.
        
        The slide show screen will have the slide window in the
        upper right, "Forward" and "Backward" buttons below the
        window, and a window with commentary on the bottom.  Down
        the left side is an index for jumping to a particulary
        slide.  The IE5 version has a button on the lower right
        to view the slides full-screen, using the mouse buttons
        for movement.
        
        COMPUTER REQUIREMENTS:  Video animations take a bit of
        horsepower, so a perky CPU with a healthy amount of
        memory and a decent video card are recommended.  As an
        example, a 233 MHz laptop does OK but has to skip some
        frames to keep up.  Some of the bargain systems with
        "on-board" video sharing main memory may choke.  And your
        old 386 will be toes-up in a hurry.
        
        COMMENTS and SUGGESTIONS to w1ghz@arrl.net