1. The GAWANT Antenna - https://k1fm.us/2020/06/the-gawant-antenna/
2. AA8C: Glen's Projects - http://gridtoys.com/glen/projects.html
3. HF Nets - https://smarc.org/hf-nets/
** Robust Packet Network Europe - http://robust-packet.st/
4. Pi-Star - BrandMeister Talkgroup List - https://www.pistar.uk/dmr_bm_talkgroups.php
5. Amateur Radio Ham Radio Maidenhead Grid Square Locator Map - https://www.levinecentral.com/ham/grid_square.php
