I don't understand this response. Why would he need to use 2 serial ports or Y adapters? He states that a full serial port will run from computer to interface box, where the serial signals will be broken out as required for PTT and CW. Presumably the KXSER rs-232 cable could run between interface box and the KX3 to convey RXD and TXD. What am I missing?
Bob NW8L Bill, You may want to re-think using the serial port on your interface. Most data mode applications like to use the same COM port for rig control (OK, maybe just frequency display) as they use to activate DTR or RTS for PTT. Given that the KX3 supplied cables only have RXD and TXD signals, using the serial port to generate PTT requires that either you use 2 serial ports (one may be the KX3 USB cable and the other can be a real port or USB to Serial adapter), or provide a "Y" adapter to go to your interface. Use of the "Y" adapter precludes the use of the KX3 USB cable. There is nothing wrong with generating PTT from the audio stream, or just using VOX in the KX3. 73, Don W3FPR On 7/13/2012 9:51 AM, Bill Conkling wrote: > I am working on an interface in a box w/pcb. Once you use a box, you can do > anything. I plan to have full serial port and two audio cables from > computer. Transformers in the audio chain and a 10K/1k attenuator in mic > input to KX3. I will split the serial port to provide proper connections > for CAT, PTT, and CW as n1mm handles the K3. > > Whole thing in a 2.5X2.5X1 box. > > Big plans.... > > ...bill nr4c > ______________________________________________________________ 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
