1. WA3RNC TR-25 CW Transceiver Kit - http://www.nerfd.net/2021/05/28/wa3rnc-tr-25-cw-transceiver-kit/
2. new dxcluster IZ0UIN-6 telnet clusterdx.ddns.net port 7300 - http://www.iz0uin.it/2021/05/23/dx-cluster-iz0uin-6/
3. DigiLink Nano (compact digital mode Ham Radio interface) - https://www.hb9zhk.ch/
4. Constructing a 6:1 RF transformer - https://g8jnj.webs.com/6_1%20Balun.pdf
** Active antenna overview - https://www.g8jnj.net/activeantennas.htm
5. DXMAPS 4.2 - QSO/SWL real time information - https://www.dxmaps.com/spots/mapg.php?Lan=E
