Licensing
https://www.arrl.org/find-an-amateur-radio-license-exam-session
https://www.fcc.gov/wireless/bureau-divisions/mobility-division/general-mobile-radio-service-gmrs
https://glaarg-vec.groups.io/g/glaarg-vec
General
https://www.arrl.org/technology
https://en.wikipedia.org/wiki/Wireless_community_network
https://www.radioreference.com/db
https://www.broadcastify.com/listen
https://globe.adsbexchange.com
Meshtastic
https://meshtastic.org/docs/introduction
https://meshtastic.org/docs/getting-started
https://meshtastic.org/docs/community/local-groups
https://discord.com/invite/meshtastic
https://www.youtube.com/@The_Comms_Channel/videos
Software Defined Radio (SDR)
https://www.rtl-sdr.com/rtl-sdr-quick-start-guide/
https://www.nooelec.com/store/nesdr-smart.html
https://greatscottgadgets.com/sdr
https://greatscottgadgets.com/presentations
https://www.nooelec.com/store/qs
https://www.nooelec.com/store/sdr/sdr-receivers.html
https://blinry.org/50-things-with-sdr
https://www.instructables.com/A-Software-Defined-Radio-on-a-Shoestring
https://www.sdrpp.org/discord/
Radio Scanning
https://github.com/DSheirer/sdrtrunk
https://www.rtl-sdr.com/sdrtrunk-setup-and-use-tutorial
https://www.unitrunker.com/download.html
Digital Mobile Radio (DMR)
HF Radio
https://www.iz0evk.net/band-activity
https://www.qsl.net/4x4xm/Ham-Radio-Propagation-Overview.htm
https://www.hamradioschool.com
Antennas
https://hamradioacademy.com/antenna-theory-how-antennas-work-and-basic-types
3D Prints
Guides
https://greatscottgadgets.com/sdr
https://www.sigidwiki.com/wiki/Signal_Identification_Guide
Calculators
1/4 Wave Ground Plane Antenna Calculator
Other Hardware
Software
https://chirpmyradio.com/projects/chirp/wiki/Download