Active mostly in HF frequencies, my favorite is 15 meters band, but also active on all ham radios bands, from 1,8 MHZ to 28MHZ, 50 MHZ, 70MHZ 144 and 432MHZ.
Trophosferic Propagation from Portugal to Mauritanea in a Tropo duct over west Africa coast. You can listen here: CT1EKD working RW1ZC/MM on the 2 meters band (144mhz)
EME Moon bounce propagation. Using the MOON surface as a radio waves refletor. Listen how the Arecibo Radio Astronomic transmiter sounds at UHF (432mhz) at CT1EKD shack: SSB mode and CW mode (morse)
CT1EKD is also an Advisory board member, Awards Committee, Users Support and International Committee of eQSL.CC - eQSL is an International system used by Hamradio operators to confirm their radio contacts. A radio contact confirmation is called a QSL. EQSL have 264.1 million eQSLs from 323 Countries Now Online! You can obtain more details of this system here - http://www.eqsl.cc