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SDRs Online
KFS, Half-Moon Bay, CA - 160, 80, 40 and 20 meter coverage.
Northern UTAH - 160, 80/75, 60 and 40 meter amateur bands, AM broadcast, the 120, 60 and 49 meter shortwave broadcast bands.
W7NRA, Sedona, AZ - 160, 80 and 40 meter coverage.
AI6VN, Maui, HI - 80, 60 and 40 meter coverage.
K3FEF & W3TKP, Milford, PA - MW/160, 90/80, 60/49/41/40, 31/30, 25/22, 20/19 and 17 meter bands.
NA5B HF/SWBC - MW/160, 90/80, 60/49/41/40, 31/30, 25/22, 20/19, 15/13 and 11/10 meter bands
NA5B VHF - 6 Meters (50-52 MHz), Air band (119-121 MHz), 2 meters (approx. 145.35-147.40) and NOAA Weather Radio (approx. 162.1-163.9 MHz).
N4BBQ, Dalhonega, GA - 90/80 and 41/40 meter bands.
Raspberry pi and Ham Radio
KM4ACK
https://www.youtube.com/user/jasonoleham
Ham Radio Raspberry Pi | Build a Pi V3
https://youtu.be/l4M9VVqGxoc
Ham Radio Build a Pi Setup
https://youtu.be/MI3TC1PY8AI
OH8STN
https://www.youtube.com/user/SurvivalTechEU
DL1GKK
https://dl1gkk.com/setup-raspberry-pi-for-ham-radio
How to program Raspberry Pi / Pi-Star - DMR tutorial
Pi-Star - DMR tutorial
https://www.youtube.com/watch?v=DDZMY_6qjjI
How to build a cheap hotspot by www.w4gso.org
https://www.w4gso.org/wp-content/uploads/2018/09/How-to-build-a-digital-hotspot-on-the-cheap.pdf
Alternate site cheap hotspot
How to program Baofeng DM-1801 - tutorial
BaoFeng DM1801 - Installing OpenGD77 Custom Firmware and Configuring a Codeplug
https://www.youtube.com/watch?v=67gw5JL1Vlc
Baofeng DM1801 / Radioddity GD77 - Pi-Star setup and configuration guide
https://www.youtube.com/watch?v=hbeo0gaQQns