A 53ft end-fed wire has a radiation pattern that varies all over the map as you go up in frequency above 10MHz.
For 40-10M, I much prefer a 44ft center-fed doublet which has a broadside pattern on all bands. Barry N1EU On Tue, Feb 9, 2016 at 2:38 PM, Lynn W. Taylor, WB6UUT < [email protected]> wrote: > I don't believe there are magic lengths. > > There are however lengths that are decidely non-magical, and if you want > something that works on 40, 30, 20, 17, 15, 12 and 10, there are many > lengths that are non-magical. > > That's why I did not ask "what is a good length?" There is a pretty good > reference here: http://udel.edu/~mm/ham/randomWire/ > > Short of buying a 100 foot tape (or a longer one), what methods do people > use to reasonably accurately measure 53 feet (or 72 feet, or 136 feet)? > > Thanks -- Lynn > > > On 2/9/2016 11:06 AM, Barry N1EU wrote: > >> I think the only important measurement is that it avoids being near a half >> wavelength on any bands. Are there really "magic" lengths to be used with >> 9:1 xfmr into a tuner? I'm skeptical. >> >> 73, Barry N1EU >> >> On Tue, Feb 9, 2016 at 1:50 PM, Lynn W. Taylor, WB6UUT < >> [email protected]> wrote: >> >> Only a bit off-topic, since I have a KX3 w/tuner and a 9:1 balun to go >>> with it. >>> >>> I know how to trim a resonant antenna to the correct final length. I also >>> understand why truly "random" wires don't necessarily work. >>> >>> The recent post about shipboard operations near Antarctica said they're >>> using a 53' wire. >>> >>> How do you guys measure an antenna like this? I assume it can be a few >>> inches off, but.... >>> >>> 73 -- Lynn >>> >>> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
