Mark, Having trimmed many wire antennas, my suggestion is to trim a small amount (maybe less than a foot) and see what you get. I have tried percentages and all kinds of calculated math solutions and you are better off just cutting a little at a time. You seem to be close to where you want to be so the rest is more "trim a little, test, trim a little more, test", etc etc. I did a "percentage" trim on a 160 wire and ended up cutting too much off. 73 Bill Frederick wrote: > HI >> I have been tuning a quarter wave wire for 80 meters. According to > the information I obtained with my noise bridge, my 60 foot piece of > wire was resonant at about 3.4 to 3.5 MHz. I am feeding it with about > 7 feet of RG58. What I wonder is since the SWR is a product of the > total antenna system, how many feet of wire will I need to trim from > the antenna to make the system resonant at the 3.9 4.0 MHz range? > God bless, > Mark WZ0K > God loves you! > My personal prayer book. > Add your prayer or pray for others at the following link. > http://prayerbook.homewithgod.com/cgi-bin/prayerbook/multi.pl?131961113534708:24:0 >>> http://lists.topica.com/lists/funhamradio. > http://groups.google.com/group/funhamradio-list >> http://funhamradio.bloki.com >> ______________________________________________________________ > Antennas mailing list > Home: http://mailman.qth.net/mailman/listinfo/antennas > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:Antennas at mailman.qth.net >