Аналогов

Първи стъпки:
https://www.qsl.net/vu2msy/operate.htm

Рипитри в България:
https://lz.free.bg/
http://repeaters.lz1ny.net/cgi-bin/repeaters.py

Описание на докладите за качество на сигнала:
https://en.wikipedia.org/wiki/Signal_str...ity_report

http://dl2kq.de/
http://www.w8ji.com/
https://www.qsl.net/dk7zb/start1.htm

https://hrdlog.net/
http://www.dxsummit.fi/#/
https://www.dxfuncluster.com/
https://www.dxmaps.com/
https://hamwaves.com/propagation/en/index.html
https://www.voacap.com/hf/
https://dr2w.de/dx-propagation/

VHF
https://mmmonvhf.de/mufmap.php
http://aprs.mennolink.org/
https://dxinfocentre.com/tropo_eur.html