But, on the positive side, that very high impedance means an unusually efficient antenna since there is almost no ground current flowing at all.
I use a setup like that at my home station - 1/2 wavelength long wire on 80 meters - with a homebrew manual L-network. Does a great job. One reason why small auto-tuners cannot handle that huge impedance is because of the voltages involved. Thousands of volts commonly exist even with fairly low power. The capacitors and inductors in most automatic tuners simply aren't rated for that. Ron AC7AC -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Gilbert Sent: Tuesday, August 23, 2011 4:20 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KAT2 with EFHW antenna The simple answer to your question is "no". An end fed halfwave would theoretically present a few thousand ohms to your feedline, giving you an SWR of several tens to one. Consider this .... it is likely that the tuner with the greater loss will more easily give you a "match" to a difficult load. 73, Dave AB7E ______________________________________________________________ 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
