Lance, I apologize, but that information is incorrect. The KXSER uses a sealed molded connector for the RS-232 connector. It can not be opened.
There are a number of simple RS-232 male-female break our boards onthe net. You might want to try one of those. Or just make a simple short RS-232 cable that breaks out the desired lines. 73, Eric --- www.elecraft.com On 3/5/2012 7:54 PM, Lance Collister, W7GJ wrote: > Thanks for all the suggestions! I called Elecraft Tech Support and they > confirmed > that the optional "KXSER" cable had a DB9 back that could be opened, > providing access > to all the serial lines that came in on my USB to serial converter cable (I > will just > use the one that I have been using on K3 when operating portable). I will > then > install a transistor switch in that connector and add a line out of that DB9 > connector to the mic jack to key the rig ;-) > > So, I added that change to my KX3 order and I THINK the problem is solved! I > just > need to order one of those special mic plugs and wire it with jacks for the > mic and > PTT and I am in business! TNX for all the help! VY > > On 3/5/2012 5:43 PM, Lance Collister, W7GJ wrote: >> Hi Don, >> >> MNI TNX. That is what I was afraid of. I have been requesting the WJST >> option to be >> able to turn the XMTR on and off with TXD and RXD line commands for years, >> but I >> guess it just has not risen high enough on the list :-( This is the first >> time that >> it is actually ME who needs it though - in the past it is all the ICOM users >> who >> would benefit from having that option available. >> >> Looks like I will have to get a second USB cable for the KX3, and build some >> sort of >> interface that will plug into the KX3's custom mic jack to trigger the PTT. >> >> VY 73, Lance >> >> On 3/5/2012 5:15 PM, Don Wilhelm wrote: >>> Lance, >>> >>> There are only 2 conductors in the ACC1 jack, so no RTS input - only TXD >>> and RXD. >>> Your application will have to put the KX3 into transmit via the TX command >>> (HRD can >>> do that, I don't know about others), then use RX to get back to receive. >>> >>> You can build the "one transistor keying circuit" that is published in so >>> many of the >>> digital application help files and use that output to drive PTT. >>> Unfortunately, that >>> solution rules out using the KXUSB cable - you would need to use a USB to >>> serial >>> adapter or a real serial port to have the RTS (or DTR) signal available. >>> >>> 73, >>> Don W3FPR >>> >>> On 3/5/2012 11:51 AM, W7GJ, Lance wrote: >>>> Anybody know if the KX3 can be set into XMIT mode via the RTS serial line >>>> from the >>>> computer going into ACC1? I looked in the manual, but I could not find it. >>>> I know >>>> many people with barefoot rigs or modern QSK amplifiers don't care if they >>>> are >>>> running digital modes in VOX mode, but all my amplifiers use mechanical >>>> relays and >>>> when I run WSJT modes (such as FSK441 and JT65), I need to take advantage >>>> of the >>>> built-in delay afforded through that software to turn on everything to >>>> XMIT well >>>> BEFORE the tones are started. >>>> >>>> If there is no way to do this with the ACC1 jack, it appears I will have >>>> to build a >>>> separate transistor switch to interface with my USB to Serial port >>>> converter cable so >>>> I can turn on the PTT somewhere else....possibly via a special Mic >>>> connector or >>>> something. Just more stuff to haul around on DXpeditions.... >>>> >>>> Any guidance would be appreciated! MNI TNX and VY 73, Lance >>>> >> > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
