W0MU wrote: > To key cw you will need some type of keying circuitry. You have to have a keying \ > transistor to send CW.
Not true with the K3, Mike. Unlike most other radios, the K3 accepts CW and PTT keying signals on DTR and/or RTS without any need for a keying circuit - see the manual p. 18, near the bottom of the left column. The N1MM documentation has not caught up with this. If you have N1MM Logger configured for CW on DTR and PTT on RTS on the radio control port and you set the K3's CONFIG:PTT-KEY option set to RTS-DTR, then the Logger will key both PTT and CW with just a straight RS-232 cable and no other connections. If you only want to key one of CW and PTT via this port (for example, if you key CW with a Winkey on a different serial port), then you can adjust the configuration accordingly (e.g. RTS set to PTT and DTR set to Always off, with the CONFIG:PTT-KEY set to RTS-OFF). To make this work, you must make the software and the radio configurations match, and you must do it in the right order. First, go into the N1MM Logger's Configurer and change the configuration on the appropriate control line(s) from "Always on" to the desired value (PTT or CW). After you have both DTR and RTS set to the desired values in the software, and you have made sure that there is a check mark in the CW/Other column beside the port you are using for CW, *only then* go into the K3's CONFIG:PTT-KEY menu item and set it accordingly. If you make the changes in the reverse order (radio first), the default "Always on" setting in the software will key the radio, just like putting a brick on the key. As a side note, although the N1MM Configurer suggests "Always on" as the default for DTR and RTS on the radio port, with the K3 it would be better to set these defaults to "Always off" - that way, making a change to the K3's CONFIG menu without first changing the software configuration will not result in a key-down condition. 73, Rich VE3KI ______________________________________________________________ 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
