Rick, A "long wire antenna" can be fed at any point along its length, not only at one end, but at any given frequency the antenna's pattern will change as will the antenna's feedpoint impedance as the position of the feedpoint is changed. Some schemes such as the Off Centre Fed wire place the feedpoint at a position where the feedpoint impedance is lowish and similar on several bands, allowing the use of a coax feeder, but radiation from the coax feeder can be a problem if not prevented.
When I was a young ham, a "long wire" had to be at least three or four wavelengths in length. They have shrunk in recent years :-) 73, Geoff GM4ESD ----- Original Message ----- From: <[email protected]> To: <[email protected]> Sent: Sunday, July 12, 2009 7:54 PM Subject: Re: [Elecraft] New list member/T1 tuner questions > I do not understand this statement. How can a "long wire antenna" have > 2 sides ? A long wire is fed from one end only, so are you speaking of > an endfed wire with an equal length counterpoise laying on the ground or > are you speaking of a doublet antenna fed in the center with a feedline ? > I do have manual tuners but want something much simpler like and end fed > wire with an auto tuner for quick band changes in the field - don't want > to pack something the size of a MFJ-941 tuner into the woods ! ______________________________________________________________ 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
