https://www.lectrosonics.com/
https://www.turneraudio.com/
https://www.100000watts.com/
https://www.rabbitears.info/
https://www.ntia.doc.gov/osmhome/allochrt.pdf
https://www.fcc.gov/oet/spectrum/table/fcctable.pdf
https://www.sbe.org/
https://www.natpe.org/natpe/
