These are recordings from VLF stations received with LA8AK active antenna (4C) and a homebrew upconverter.

 

DCF77 77.5 KHz


75.0 KHz


60.0 KHz


66.66 KHz


18.1 KHz


11.9 KHz


12.65 KHz


14.88 KHz


18.1 KHz


18.1 KHz


18.3 KHz


18.9 KHz


19.6 KHz


20.2 KHz


20.9 KHz


22.1kHz


24.0kHz


26.7kHz


37.5kHz


40.75kHz


45.9kHz