Steve, If your tuner is of the L network type (like the Elecraft auto-tuners), it will have a difficult time matching the high impedance of a half wave end fed antenna. If you want something similar, use the W3EDP length antenna - an 85 ft. radiating section with a 17 ft. counterpoise wire in place of the half wave.
If you insist on feeding a half wave antenna at the end, plan to use a parallel tuned circuit to tune it - the Z-match tuner is a multiband tuner of that type and will tune high impedances fine. I personally consider the center fed configuration to be less troublesome because it is inherently balanced, but then you have to set it up in a balanced configuration to preserve that balance, and I usually end up with an inverted VEE configuration which works just fine with one support. 73, Don W3FPR > -----Original Message----- > > This may be silly question? I'm trying to cut down on set up time and > weight for my backpacking journeys into the field with QRP gear. The > end fed halfwave or random wire 'sounds' good to me becasue of the no > feed line and a simple LC tuner can be used. Opposed to CF halfwave > with balanced tuner (heavy toriod) and additional feedline weight? > > OK heres the REAL question: once you have a halfwave, (5/8 or 3/4 wave > whatever) suspended in the tree or on a pole, Does it really matter > how it gets fed? Wouldn't end feeding give the same result (or > should?) as center or even offset feeding? Of course this assume a > it's over a pefect ground etc (But truth is I'm usually over very poor > ground situation) > > It seems to me the endfed half-wave inverted vee should give me the > same result as the center fed inverted vee and have the benefit of > leaving the feedline at home. But may limit where I park my tent and > how the antenna gets supported etc? Am I missing something -- w/my > limited knowledge of antennas? > > My experience has been the CF antennas have out performed (or so I > think) than my end fed setups? But I may not have properly match the > EF ants or I may be CF-biased from what I've read? Where's the TRUTH?? > > Steve/n0tu > _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
