I am sure that someone has mentioned this before however, has someone located a good source of matching plugs for the mic and headphone jack on the KX3? I would like to order some in advance and start some projects.
73 Gene K1NR KX3 S/N TBD : -) On Thu, 08 Mar 2012 21:15:06 -0500 Don Wilhelm <w3...@embarqmail.com> wrote: > For those who do not understand the technicalities, I > would suggest that > the CM-500 cannot be plugged directly into the KX3 jack. > The KX3 PTT is > on the ring connection, and the stock CM-500 connects the > Tip and ring > together for the AF connection. > > It MAY work, but it is not a certainty, the KX3 function > of the ring > contact is three-fold - PTT, UP and DWN. > the audio level on the ring may or may not induce one of > those functions > depending on the voltage and current. > > It would be better to create a homebrew adapter that > would accept the > CM-500 AF on the tip and ring, and connect that only to > the tip of the > KX3 jack, and at the same time add a small box with a > pushbutton for PTT > and also pushbuttons (with the appropriate resistors) for > UP and DWN). > > In other words, the stock CM-500 *may* work, but it may > not depending on > the levels presented at the ring connection. > > This situation may also be present in microphone designed > primarily for > computer use - they may be OK, but if they create funny > PTT or UP or DWN > conditions, blame it on the connection between tip and > ring on the > microphone jack. > > 73, > Don W3FPR > > On 3/8/2012 3:46 PM, Joe Subich, W4TV wrote: > >> As for the CM-500, I'd like to know if it is the tip, > or ring, on the > >> 1/8 inch plug that is the actual mic audio lead. I > will have to try > >> one, or the other, to see. > > The answer is quite simple ... the tip and ring of the > CM-500 mic plug > > are connected together. > > > > The supplied battery box has no connection to the ring > of the mic > > (3.5mm jack). Tip of the jack is connected to tip and > ring of the > > 3.5mm plug via a 1 uF capacitor. The positive side of > the battery > > (+3.0V) is connected to the tip of the 3.5mm jack with > a 2.2K Ohm > > resistor. The negative side of the battery is > connected to sleeve > > (common/ground) of both plug and jack (input/output). > > > > 73, > > > > ... Joe, W4TV > > > > > ______________________________________________________________ > 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 --------------------------------------------------------------------- Web mail provided by NuNet, Inc. The Premier National provider. http://www.nni.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
