- The official home of the HSC, VHSC, SHSC, EHSC clubs. A wealth of information about Morse Code.www.morsecode.dutch.nl/index2.html
- Amateur radio direction finding in the Netherlands.home.introweb.nl/~pa3fdc
- A German amateur radio direction finding club with links to many other clubs in the area and around the world.www.darc.de/referate/ardf