WM2D F Lengyel
I just acquired a pair of 915MHz Meshtastic Messengers ("Meshengers," available from Etsy) and watched them form a mesh with a Meshtastic Mesh Device Station Edition G1, which I'll connect to a flat panel circularly polarized 8dB gain antenna--this works with up to 15 W input. The FCC allows unlicensed operation in the 33cm ISM band up to 160mw (22 dBm)--hams can operate on a secondary basis. To run the Station G1 at 3W I must disable encryption, which is quickly done with the Meshtastic app.
Apr 28, 2023 at 3:42pmWeb
Show threadSteve Stroh N8GNJApr 28, 2023
@WM2D In 902-928 MHz, Amateur Radio must "not causing harmful interference to the operations of Federal stations authorized in this band or to Location and Monitoring Service (LMS) systems". ISM operations have to tolerate interference from Amateur Radio (and LMS); and Amateur Radio has to tolerate interference from ISM operations. Amateur Radio isn't constrained in power, etc. in 902-928 MHz, only in certain areas around government facilities. See US 275 in https://www.ntia.doc.gov/files/ntia/publications/compendium/0902.00-0928.00_01MAR14.pdf
Show threadWM2D F LengyelApr 29, 2023
@n8gnj Thanks for this. I'm in Manhattan, NYC. There are LoRa signals in the ISM band here--I will check if there are any Federal or LMS stations in the area. I somehow doubt it. For now, I'm keeping the power output to 100mW.