Hi Don, thanks for support, I'll try to guess how much inductance the coil of W3EDP is, so to use a smaller toroid instead of a more invasive and bigger 2 inches coil...
Finally, all I need is (if possible) a single wire antenna for 80-20 meter range, so to not have to change wire every time I will change a band. Even with somewhat like a tuner could do fine, but also with something to check the SWR with KX1. I know the little jewelty shows the SWR, but only after having tuned a wire, so using an external tuner without SWR reading should be quite difficult to prune a tuner not having an istantaneus reading of what I am going to do. Thanks for now Ciao Sante At 00.08 11/07/2011, you wrote: > Sante, > >The KX1 antenna tuner has limited range due to its small size, so I >would not expect it to tune an end-fed 40 meter dipole on 80 meters. > >In addition, a half size end fed dipole is no longer an end fed >dipole, it is just a piece of wire. The "half wave" part says that >is true. A 1/4 wave wire without any other component is only half >of a half-wave dipole no matter where it is fed. > >What I would suggest instead is the so-called W3EDP antenna >connected to the KX1 with no feedline. The radiator is 89 feet >(27.13 meters) and the counterpoise for 3.5 MHz is 17 feet (5.18m). > >Take a look at http://www.zerobeat.net/g3ycc/w3edp.htm. On 80 >meters, you may need the auxiliary (external) tuning circuit, but >once you have tuned the external circuit inside any one band, you >can use the KX1 internal tuner as you move around in the band. > >73, >Don W3FPR > >On 7/10/2011 5:21 PM, Sante - IK0HBN wrote: >>Hi all, >>there is a plenty of schematic about End Fed Half Wave antenna, but >>all them are within the range 40-10 meter. Is there one of you who >>was able to run it with a KX1 in the range 80-20 meter? The idea of >>getting a wire hanged somewhere, without long radials if not a 2-3 >>meters counterpoise is very intriguing. >>BTW with the internal tuner, should KX1 be able to match it without >>another external tuner, just to make things simpler with few things >>to bring along? >>Ciao >>Sante ______________________________________________________________ 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
