The intrinsic higher impedance of ladder line helps reduce the losses through a lower SWR than typical coax. A center fed wire at least 1/4 wave long end-to-end on the lowest frequency used (e.g. 130 feet on 160 meters) and fed with typical 350 to 450 ohm ladder line will show an SWR of 10:1 or less across the HF spectrum, since a real-world wire will show an impedance of only 4,000 ohms or so even when it is exactly 1/2 wavelength long.
Feeding the same antenna with 50 ohm coaxial line will result in an SWR 100:1 or greater and so much greater losses. 73, Ron AC7AC -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Wes Stewart Sent: Tuesday, January 31, 2017 5:07 AM To: [email protected] Subject: Re: [Elecraft] The "Kinda Random Antenna" Sadly, this is often untrue. Get Dan's (AC6LA) program at: http://ac6la.com/tldetails1.html and run some examples. for more on ladder line see: http://k6mhe.com/n7ws/Ladder_Line.pdf On 1/30/2017 9:00 PM, Barry wrote: > ...I feed it with ladder line which has low loss even at absurdly high > SWRs, and the tuner I use is designed to be used with antennas that > are no where near optimum. ______________________________________________________________ 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 Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
