The KX3mic jack provides both mic bias and logic bias. A two-conductor mic plug will short the mic bias to the logic bias. The logic bias is not filtered. I realized that a stereo splitter would separate the logic bias to one channel (where it could be used for PTT) and a mic could be plugged into the other channel with the filtered mic bias.
I wrote the two articles because I got really, really tired of posting the same information over and over again to the this list. The problem was originally diagnosed on this list by Lyle, KK7P. He suggested turning off mic bias and using only the logic bias. Separating them out works even better. Here is Lyle’s email: https://groups.yahoo.com/neo/groups/KX3/conversations/topics/9556 The article is pretty short and has pictures. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Jul 1, 2018, at 4:51 PM, Don Wilhelm <donw...@embarqmail.com> wrote: > > wunder, > > How do you achieve "cleaner mic bias" - the mic bias is either turned on or > turned off. The bias voltage comes from the K3. > > Sorry, but for purposes of this email reflector, I do not wish to read your > entire links - often with links like that, there is no content of value. Put > the relevant information in the text please. > > 73, > Don W3FPR > > On 7/1/2018 4:49 PM, Walter Underwood wrote: >> Also for voice modes, I’ve compiled some ideas from this list (along with >> one of my own) for cleaner mic bias and for TX EQ and compression setup. ______________________________________________________________ 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
