To answer your later email to me (Time sent was 4:27 PM, my local time); Yes, I just now am viewing the "diagram," Wayne.
Earlier in the "original post" (Thu, 29 Dec 2011 08:22:53 -0800), I believe you had mentioned: "However, the mic jack can also be used with mics having a 3-circuit (stereo) plug. These will not provide PTT or UP/DN controls, but can still be used with VOX or the XMIT switch (equivalent to PTT)." -Which I had understood to be that the 3-circuit (stereo) plug "...will not provide PTT..." function. (-In other words, per the clip above, a 3-circuit plug would be DENIED functional access to the desired PTT function.) Well, this latest information does not seem to reflect this same point! -And this is very welcome news! (Thank you!) Bottom line: Call off the dogs! The 3-circuit plug appears to indeed be permitted the coveted PTT function! Ya-HOOO! 73, and I again thank you for your very patient clarification. Now, START MAKING THEM RADIOS!!! It looks like you have an extremely fine product! -Mike- KØJTA On 12/30/11 3:57 PM, Wayne Burdick wrote: > Mike, > > Here's how the mic is wired: > > Sleeve = shield ground > ring2 = logic ground > ring1 = PTT/UP/DN > tip = mic audio > > Since a 3-circuit plug merges sleeve and ring2, a mic with such a plug > could be wired to work with the KX3 and provide PTT, though I don't > have one with which to test this idea. > > On the ring1 line, resistance to ground determines the function: > > PTT: 0 ohms > DN: 4.7 k > UP: 10 k > > We may invoke another function with the combination of UP+DN (3.2 k). > We could call this a "meta" operation that changes what UP/DN do. For > example, their function could switch to band, RIT, or volume up/down. > > Let me know if your target mic will work with the above wiring as-is, > or if a simple mod is required, and we'll add it to our KX3 FAQ. > > 73, > Wayne > N6KR > > > ______________________________________________________________ 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
