John, Just like Bruce said regarding the 1899...
I started at one tap position for 20M and then changed the coil tap to another for 40M. When I wrote my original note that was my 40M testing... I failed to mention in my earlier email. In this case the whip length itself isn't adjusted, just the tap, and I guess to be optimal the length of counterpoise should be as well, but I cut corners and didn't do that. I got lazy and after getting it close enough I switched on the ATU of the KX3 and it tuned to 1.2:1. That ATU is a great feature for use with antennas such as these where bandwidth is going to be narrow and tuning can be a pain without a good ATU. Cannot imagine life without one when doing portable stuff with compromised antennas... I'd spend all day tuning up... Tom, W2YF On Thu, Mar 24, 2016 at 10:21 AM, Bruce Nourish <[email protected]> wrote: > Most of the electrical length of these physically-short whips is in the > loading coal. Adjusting the length of the 40m whip as you describe would > only move the resonance point around within the 40m band. To move the > resonance point between bands, you'd need to tap the coil. MFJ makes such a > whip; scroll to page 2 of this doc and read about the 1899T: > > http://www.mfjenterprises.com/support.php?productid=MFJ-1810T > > On Thu, Mar 24, 2016 at 6:55 AM John Pitz <[email protected]> > wrote: > > > 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 > > > > > > ______________________________________________________________ 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]
