Tag Archives: Signalink

KX2 Digital modes configuration examples

I spent a lot of time working on digital mode configurations with my KX2 this weekend. I got involved in a thread on the Elecraft mailing list regarding FT8 configuration using a SignaLink USB. Even though I had a functioning configuration using a USB soundcard I pulled out my SignaLink USB, the jumper board, and cables in order to put that configuration together for use with my KX2 as well. I got it going for both WSJT-X and Fldigi. One thing led to another and as I was putting together a little document with notes for myself I decided to polish it up a bit and post it.

Here it is:

KX2 Digital Mode Configuration Examples.pdf

It’s hosted in my lutherie domain so don’t worry about the download source.

Understand that there are more than a couple of variables involved in setting this up. Your situation and\or needs may well differ from mine. It’s not an exhaustive document, there are other bits for you to sort out, but it may be useful to get you started. As I said, I was preparing a simple document for myself to keep track of my configurations and it sort of took on a life of its own. I’m early into my experience with these modes and the KX2. Also, I only have a KX2 with which to test but I’m pretty sure that all of this works the same for a KX3. If you find this useful, great. If not, so be it. As they say, YMMV.



Ps – If you find any errors please let me know and I will correct them and re-post.


What is the best hobby of all possible hobbies…that’s right AMATEUR RADIO!

After all these years I’m finally starting to dabble with the digital modes.  After an extended period of time (measured in years since they were first released) I finally bought a Signalink.  I picked up the Signalink USB at the local candy store, Amateur Electronic Supply.

What finally drove me to get the Signalink was learning about WSPR from a post on G4ILO’s site (http://www.g4ilo.com/wspr.html) that I came across while searching on some propagation topics.  This post led to some searches for more on WSPR which resulted in a bunch of information including this post on AA7EE’s site: The Awesomeness That Is The Signalink USB Sound Card Interface which clinched both the Signalink purchase and WSPR.

While there are a lot of ways in which to WSPR my current setup is the Signalink USB, an ICOM IC-718, my Cobra UltraLite Senior antenna, and a Dell Optiplex 760 running Windows 7.

After connecting the Signalink to the radio (using the 13-pin DIN cable that comes with the Signalink SLUSB13I for ICOM radios) and a USB connection to the PC the configuration for the WSPR 2.0 software was as follows:

WSPR Station Parameters

WSPR Station Parameters

Once configured and switched out of idle the WSPR software started to receive its first WSPRs at my station.

First WSPRs

With the confirmation that receive worked I dialed down the power and tuned up for transmit, moved the Tx fraction slider to 20%, and let the WSPR software take control.  After a wee bit my spots were showing up on the WSPR map:

First WSPRs 2

And the software has been WSPRing along now for over two hours:

First WSPRs 5

Including a WSPR station in Antarctica, OC3HHY:

First WSPRs 6

This is very cool!

Part of what make WSPR tick is time synchronization (+/- 1 second) with UTC. While there are many ways to accomplish this I’m using NISTIME 32.  Be sure to “Run as Administrator” if your not using an account with admin privileges in Windows 7 otherwise the app won’t be able to update the PC clock.

More information on WSPR is located at the WSPR site and the WSPRnet.