Amateur Radio Resources
Ham radio resources websites:
https://vu2nsb.com/radio-systems/ (Technical articles)
http://www.arrl.org/files/file/Regulatory/Band%20Chart/Band%20Chart.pdf
https://www.icomamerica.com/en/amateur/amateurtools/US-BandPlan-Update-1-2020.pdf
https://www.smeter.net/spectrum/amateur.php
http://www.arrl.org/international-call-sign-series
https://www.arrl.org/files/file/conop.pdf
https://www.worldwidedx.com/forums/
http://www.k3lr.com/engineering/pl259/
https://w0tlm.com/sites/default/files/2022-08/Intro%20to%20Node%20Red%20-%20Kyle%20AA0Z.pdf
Line of sight-distance-coverage calculators