Jim, yes in you example ' Rs + j Xs)' I was referring to Rs, which I though was the antenna resistance, and jXs the capacitive or Inductive reactance, of which does not consume any power, but effects the power factor (phase shift) acting on the real antenna resistance. Which part did I misquote or misunderstand Jim, or is Rs not the antenna resistance under the conditions of measurement. ?
Adrian ... vk4tux -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jim Brown Sent: Thursday, 5 March 2020 2:32 PM To: [email protected] Subject: Re: [Elecraft] High Current only on 20 Meters On 3/4/2020 8:15 PM, Adrian wrote: > When I say radiation resistance I include the small copper resistance also, which is negligible on this heavy copper wire delta loop. An important part of my post was about using the right words to describe physical reality. Radiation resistance is a characteristic of an antenna, and can be used to compute antenna efficiency. That's NOT what you're measuring. You are measuring feedpoint impedance (assuming you can connect at the feedpoint AND that your measurement setup doesn't change the impedance). So please call it what it is -- the feedpoint impedance, which your analzyer probably reports as Rs + j Xs). :) 73, Jim K9YC ______________________________________________________________ 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]
