Can we change subject matter. Min is on the way and this is way to freakey!!!!!!!
73, Bill K9YEQ https://wrj-tech.com/ -----Original Message----- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of John Oppenheimer Sent: Friday, June 22, 2018 5:27 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-1500 ATU not working well Here is a picture and some plot images: http://www.kn5l.net/Elecraft/CP1/ Not super accurate 60 and 100 Ohm loads, but provides an insight of the coupler operation. John KN5L On 06/22/2018 04:15 PM, Wes Stewart wrote: > I don't quite understand your methodology but there is one, apparently > little known caveat with the use of the "Elecraft" coupler topology. > AFAIK, this was first used by John Grebenkemper, KI6WX, in his Tandem > Match, described in QST, January 1987. > > Paul Kiciak, N2PK, mentions in his paper, "An HF In-Line Return Loss > And Power Meter", that this coupler suffers from poor input match at lower > frequencies. > So the SWR meter has high SWR! > > If the CP1 wasn't so expensive, I'd buy one just to measure it. ______________________________________________________________ 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 k9...@live.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 arch...@mail-archive.com
