Bill, W5WVO gave a very detailed reply. I would like to say the K3 requires no interface for digital modes. Just run two audio patch cords (you can buy then at RS) from the speaker and mic jacks on the computer soundcard to the LINE-IN and LINE-OUT jacks on the KVX3 panel. All the audio interfacing is done by the K3. Run a standard serial cable (RS-232) cable from the computer to the K3. In the WSJT sw open OPTIONS under the SETUP tab and enter your station info and chose PTT Port 1. In the K3 change your mode to DATA. That's it! I leave my mic and compression set for voice and adjust audio at the computer.
You will have to adjust audio levels in the computer using the audio dialog box (I right-click on the speaker icon at the lower bottom of the screen to open this). Chose OPEN VOLUME CONTROL and PLAYBACK to set transmit levels with the WAVE slider control. Back to WSJT, Click OPEN TEST MESSAGES under the SETUP tab. You will see several windows marked TX1, TX2, etc. Just click one to place the transmitter into TX and adjust the slider until you just reach full power out. You can click the others if you are curious but TX1 usually is all that you need for adjusting transmit audio. Click options on the volume window to select PROPERTIES and RECORD to gain access to the speaker control to set the level for the Spectra-JT display window. You really should read the WSJT instruction available from the WSJT website. He gives detailed instructions for set up there. For other soundcard programs follow their instructions for setup. The K3 is ready to use for digital on the DATA mode and no extra interface is needed. Way to go Elecraft! 73, Ed - KL7UW ------------------------------ Message: 9 Date: Fri, 2 Jul 2010 10:14:38 -0700 (PDT) From: Lee Buller <[email protected]> Subject: [Elecraft] WJST and the K3 To: Elecraft Reflector <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset=us-ascii OK.... I got the 6 meter bug...as you all know by now.... I have been trying to set up WJST for the K3. Can anyone send me some information as to how to do this? I am under the impression that it needs to be on SSB - but can't find information on which sideband. How do you key the rig on SSB, it does not want to do so because I think it wants to see DATA. I have a SignaLink USB - works great on RTTY and PSK...but seems to not want to deal with WJST. I've RTFM several times but am lost. Anyone can give me a hint...a web page to read (I've read a lot of them today)..or something... I am missing something somewhere. Who is the expert I can communicate off the list! Lee K0WA 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-600w, 432-100w, 1296-60w, 3400-fall 2010 DUBUS Magazine USA Rep [email protected] ====================================== ______________________________________________________________ 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

