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
