Single Side BandWhen the range of a VHF radio just wont do, offshore vessel operators choose Digital Antennas high performance Single Side Band antennas for exceptional communication over the entire HF frequency range (must use with a tuner). Heavy duty construction for use in the roughest seas, our SSB antennas are a popular choice for boaters when durability, performance and great looks are prerequisites.All of our antennas are made in the USA, assembled, tested and tuned by hand for maximum performance, quality and durability. UPS shippable.Our SSB antennas require a side support 3' to 4' from the base of the antenna. SSB Antennas Feature:Powerful brass radiators Soldered connections Centering foam insulator High gloss urethane finish 316 stainless steel ferrule 500 Series:Mount: Standard 1"14 threaded base RF Termination: 1/4"-20 stainless steel stud Cable: Not included