Make: Volume 82

or national levels. APRS packet radio for data

forwarding and Digital Voice modes like DMR,

System Fusion, and D-Start have the same

limitation.

When it comes to long distance

communications, HF radio (aka shortwave,) is

the gold standard and can potentially circle the

globe without repeaters. Using these bands in

all but serious emergencies requires a General

or Extra class license.Local comms are still

possible on HF bands, but generally require

special antenna configurations (Figure

B

).

www.arrl.org/what-is-ham-radio



LoRa NETWORKS

While most devices that operate above 30MHz are

limited to line-of-sight comms, new technologies

like LoRaWAN ...