The speaker wire loss study page: https://www.kn5l.net/SpeakerWire/
is updated with #22 measurement and model. A good demonstration of vinyl RF absorption. The larger #18 speaker wire with greater vinyl content results with an increased loss over #22 speaker wire. Where the #18 vinyl loss is three time the copper loss, the #22 vinyl loss is two times the copper loss. John KN5L On 12/18/18 8:46 PM, John Oppenheimer wrote: > There were some comments about speaker loss and the contribution of loss > as a result of vinyl dielectric. A way to evaluate is to measure a > length of speaker wire and compare to an air dielectric equivalent. Here > is an example: > > https://www.kn5l.net/SpeakerWire/ > > The Air dielectric equivalent model is for #18 with spacing for a Zo > match with the speaker wire, 117 Ohm. > > Note that at 10 MHz, the speaker wire loss is over three times the air > dielectric equivalent. > > A DC resistance of the speaker wire suggested that the wire size is > actually closer to #19. Tough measuring these very low DC resistances, > so decided to assume #18 for the air dielectric model. > > The speaker wire loss and Zo used a Zoc and Zsc data set. There are > links to the two files for verification. > > Check my math! > > John KN5L > ______________________________________________________________ > 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 j...@kn5l.net > ______________________________________________________________ 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
