- SDRPlay RSPduo https://www.bonito.net/newsroom/sdrplay-rspduo-lasst-die-spiele-beginnen/
  - Dokumentation auf Youtube  englisch https://www.sdrplay.com/apps-catalogue/
  - SDRPlay Internetseite https://www.sdrplay.com/start-here
  - SDRPlay Internetseite https://www.sdrplay.com/start-here2/ SerialNr.:210701D634 Linux Ubuntu
  - https://www.instructables.com/Internet-Radio-Using-an-ESP32/
  - web sdr wismar http://dlwis-websdr.ham-radio-op.net:8901/
  - satteliten sdr satwebsdr https://eshail.batc.org.uk/
  - Niederlande: http://websdr.ewi.utwente.nl:8901/?
  - Websdr_Werneuchen http://agjkjq167gptuzr9.myfritz.net:8073/ 
  - Liste von WEP_SDR https://do7hjk.de/htdocs/websdr.html
  - Software_Dongel_Hardware https://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/
  - Open ear https://www.rtl-sdr.com/openear-updated-to-version-1-6/