Hi Matt, > Of course you realise that the output impedance of the ATU will be the > complex conjugate of the impedance at the rig end of your feedline.
I wonder if this is correct IMO, the task of the tuner is to make the tx happy, so it can look into the load it is designed for. Thus, it will translate the impedance as seen from the antenna connector into something as close to 50 ohm as possible. The tuner will not change anything on the feeder. With or without the tuner, the feeder will have the same VSWR. Per-Tore / LA7NO On 31 July 2014 22:02, Matt VK2RQ <matt.vk...@gmail.com> wrote: > Of course you realise that the output impedance of the ATU will be the > complex conjugate of the impedance at the rig end of your feedline. > However, if you want to know the impedance of your antenna, you need to > realise that the feedline is acting as an impedance transformer, and you > need to take into account factors such as length of feedline, frequency of > operation characteristic impedance and velocity factor of the feedline, > etc.. > > 73, Matt VK2RQ > > > On 1 Aug 2014, at 1:02 am, TF3KX <kristi...@gmail.com> wrote: > > > > Thanks. Yes, I can determine the tuner settings (L/C-values, etc.) and > from > > the network equations derive the impedance these settings match into. It > > would be neat if the K2 had enough CPU power and memory to carry these > > calculations out for me and just display the R+jX. Perhaps a good project > > for a small program or an app... > > > > 73 - Kristinn, TF3KX > > > > > > > > -- > > View this message in context: > http://elecraft.365791.n2.nabble.com/Can-I-measure-antenna-impedance-with-K2-tp7591798p7591803.html > > Sent from the Elecraft mailing list archive at Nabble.com. > > ______________________________________________________________ > > 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 > > Message delivered to matt.vk...@gmail.com > ______________________________________________________________ > 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 > Message delivered to p...@ieee.org > ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
