I used a low and bent doublet of 2 x 88ft per section for a while and it "tuned" up amazingly well on all bands 160 to 10 with the KAT3. As a rule I like to use multi-band doublets away from any obvious in-band resonances, so that it doesn't experience very high Z anywhere, so, adding a bit on each end and stringing them wherever they will sensibly go should work for you. A choke in the coax feed is good.
David G3UNA I have only just recently added the KAT3 and I'm very impressed with it, but given the praise heaped upon it by others I'm slightly surprised that the best VSWR I can get on 160m is about 8:1. The antenna is approximately a doublet which is a half wave long on 80m I say 'approximately' as it's slightly off-centre fed. I have about 7m of 300 ohm slotted down from the feedpoint and then into a coaxial choke at roof level for the remaining 10m into the back of the K3. Substituting the straight connection for a 4:1 balun (Guanella) at the transition between the slotted feeder and the coax helps slightly but not by much. Tomorrow I may well add some extra wire to hang vertically down from the ends of the doublet. In the meantime I would be pleased to hear any comments. Happy New Year! 73 Stephen, G4SJP ______________________________________________________________ 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
