Related by context. Frequent words. (Click for all words.) 53 Amateur Radio 52 APRS 51 AMSAT 51 VHF UHF 49 ARRL 48 Beamforming 46 DSRC 46 IARU 45 OBSAI 45 SKYWARN 45 ham radio 45 Downlink 44 PSIP 44 Software Defined Radio 44 AN/PRC-#G 44 NG3K 44 MHZ 44 DXCC 44 Hamfest 44 Smart Antenna 43 3GPP LTE 43 WCDMA HSDPA 43 Repeater 43 Interoperable Communications 43 Digital Radio Mondiale 42 SDR Forum 42 ham radios 42 FDMA 41 QSOs 41 QRP 41 QSO 41 CHIRP 41 SuitSat 41 NGMN 41 DXpedition 41 IMDA 41 EUMETSAT 41 PSK# 41 RTTY 40 WUSB 40 ISOC 40 IPDC 40 NMEA 40 SPIRE 40 MARS 40 #.# MHz [001] 40 WSCA 40 downlinks 40 RapidIO Trade 40 NASBA 40 MHz frequencies 40 ARISS 40 kHz 40 AMF JTRS 40 GVF 39 1MHz 39 #.#b wireless 39 MMDS 39 ATIS 39 ictQatar 39 LPFM 39 QDMA 39 VHF 39 WiGig Alliance 39 #G/#.#G 39 BICSI 39 directional antennas 39 Skywarn 39 Power Amplifiers 39 SINCGARS 39 Lectrosonics 39 HAM radio 38 NextView 38 datalink 38 ARES 38 Logbook 38 ASPRS 38 Ku Band 38 SNOMED CT 38 sideband 38 IEEE 38 frequency modulation 38 Unmanned Aircraft System 38 HF bands 38 Ported 38 GSM cellular 38 RACES 38 callsign 38 ETSI 38 Electronic Engineers IEEE 38 NCOIC 38 ESOC 38 Shortwave 38 Condition Monitoring 37 Icom 37 TRATRA 37 LMDS 37 LRIT 37 AUVSI 37 Account Transfer 37 CLPA