On Mon, 28 Jul 2008 18:43:02 -0400, Stephen Reichlyn wrote: >I'd like to interface my K3 to N1MM. Am I assuming correctly that >one needs only connect the rig's RS232 port to a serial port >on the computer to get full radio control AND CW sending?
For radio control, CW, and PTT, you need a DB9 to DB9 with wires connecting pins 2, 3, 4, 5, and 7. Then go into Config and tell the K3 to look for CW and PTT on 4 and 7 respectively. If you have an unusually severe "RF in the shack" problem (for example, you're loading a long wire that ends in the shack), you should look at the special serial cable wiring in my RFI tutorial. My serial cable is home made and uses the four twisted pairs in unshielded CAT5 for the connection, with the return conductor of each pair going to ground and the hot conductors of each pair going to 2, 3, 4, and 7, respectively. I also solve the pin 1 problem built into most radios and most computers by connecting those return conductors to the connector shell, not pin 5. http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim Brown K9YC _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
