- http://www.vushf.dk
- https://www.beaconspot.uk
http://www.brugtgrej.dk - http://www.edr.dk
- https://www.mmmonvhf.de/
- https://www.dxinfocentre.com/tropo_nwe.html
- https://tropo.f5len.org/forecasts-for-europe/
- http://dg7ybn.de
- http://www.oz9f.dk
- http://www.ov3t.dk
- http://www.wimo.de
- http://www.db6nt.de
- https://www.kuhne-electronic.de/
- https://eshail.batc.org.uk/nb/m.html
- https://leleivre.com/rftools.html
- https://clublog.org/livestream/OZ3Z