This website is primarily about the technic of amateur Doppler direction finders and their antennas. My measurements show impressively which antennas work well and which are better not to set up.
If you would like to read these pages in your native language, please use the automatic Google translator at the top right.
Click on the menu in the top right-hand corner and have fun!
73 de DF9IE
Roland
See also the website of the Kalmit sounding group, which deals with the hunt of relay jammers around the VHF repeater KALMIT (DB0XK).