This issue of 73 Magazine has some articles on it: https://ia600308.us.archive.org/16/items/73-magazine-1988-02/02_February_1988.pdf Wayne WB5WSV -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.qth.net/pipermail/arc5/attachments/20200215/87f3f109/attachment.html>