Hello All, Please excuse the amateurishness of this question, but could you get one of these whips for a low band such as 40M and use it on say 20M if you don't extend it fully?
John Pitz KD8CIV On Wed, 2016-03-23 at 22:02 -0700, Wayne Burdick wrote: > "Walter Underwood wun...@wunderwood.org [KX3]" <kx3-nore...@yahoogroups.com> > wrote: > > > I got the whip for 17m. I figure there is not much difference between a > > coil at the base of the whip and a coil inside the ATU. Neither one will > > radiate. So get a whip for the highest band you want to use and let the ATU > > provide loading for lower bands. > > That is not my experience. A high-Q loading coil, combined with the whip, is > resonant near a given band and provides much lower loss than a whip of the > same length with no coil, matched using the internal ATU. So while the ATU > *can* match the whip on bands other than the design band, the farther you get > from the design band, the greater the loss. > > That said, a 17-meter whip is a good choice if you want to occasionally use > it on 20 and 15 meters and you're willing to accept the comopromise. I'll try > to put some numbers this. I have whips for all three bands for comparison. > > When I operate mobile I use a 17-meter whip for this reason. A mobile whip > with a larger tunable coil would work much better outside the design band, > but my XYL (when she's riding in my CRV) prefers the svelte look of that > skinny, single-band radiator :) > > Wayne > N6KR > > > > > > > > wunder > > K6WRU > > Walter Underwood > > CM87wj > > http://observer.wunderwood.org/ (my blog) > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to crustac...@brig-elec.com > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
