Carl wrote: > This is exactly what I did on my sailboat years ago. I mounted the > "tuner" (Icom AH 4) right at the base of the chainplate, inside. I use > that plastic shroud cover over the bottom part of the backstay. > Remember that the lead from the tuner to the backstay is part of the > antenna and does radiate. Actually, everything from the output of the > tuner on is antenna. There are certain lengths to avoid, depending on > the bands to be used. I am familiar with the ham bands, but not the > marine frequencies. The antenna doesn't need to be only 23 (?) feet, > longer is better as long as the "bad" lengths are avoided. Wish I > still had the chart. My backstay antenna is just short of 40 feet, and > works good. > This article gives the logic behind finding "bad" lengths. For those mathematically inclined, you can generate your own chart based on his logic and your favorite frequencies. For hams, you can use his tables and not worry about the math.
http://www.w0ipl.net/ECom/NVIS/random-l.htm Jim. _______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
