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On Sat, 18 Mar 2006 14:54:25 -0500, "Basil Burgess"
wrote: Thank you, Ralph I'm sorry if I am giving inadequate information. Besides the basic description of the antenna, I'm not sure what else to offer. I doubt it took anyone long to realize that I am a novice and have as much info on antennas as one learns for the Canadian basic exam, and and can glean from a borrowed copy of the ARRL Antenna Book. The only additions I have are that on closer inspection, the balun is Van Gorden's (the manufacturer of the original antenna) Hi-Q Center Insulator. Also, I am using an external automatic tuner, a Z-11 Pro by LDG. It apparently tunes the antenna down to an SWR of 1.5, but doesn't have the means to give a more accurate figure. My FT-875 displays SWR, as a bar display, but when the tuner has done its job, the rig seems to display no SWR bars, which I take to mean the rig sees a 1:1 or close to it. Still, I guess that's no guarantee that the power is being used efficiently. Anyway, thanks again for your help 73 Basil Burgess, VE3JEB For a first attempt, it sounds like you've built a complicated affair: slinkies, twinlead, balun, coax, tuner, etc. You might try the other extreme, simple. A dipole of two straight wires cut to frequency, and a length of coax to the rig. Make the antenna a little long, and use your rig's swr meter to adjust the length down to resonance. bob k5qwg |
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