SSB (“side­band”, Sin­gle Side­band Sup­pressed Car­ri­er) is the descen­dant of tra­di­tion­al AM. Com­pared to AM, SSB requires less than half the band­width and it offers much more “talk pow­er”, since the unnec­es­sary car­ri­er and sec­ond side­band are not trans­mit­ted. SSB requires more fre­quen­cy sta­bil­i­ty and some­what more com­plex cir­cuit­ry than AM, but essen­tial­ly all main­stream ama­teur gear for the HF bands now sup­ports SSB voice.

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