Shakespeare Style 390-1 HF Vertical Antenna. New. The Style 390-1 is a 23′, two-section SSB whip antenna with conductors running full length and an anodized Almag 35 aluminum base flange and a side feed termination band. This antenna’s design supports transmitter power up to 1 KW. Electronic manual included. Here is a Link to Shakespeare Marine’s 390-1 Classic SSB Antenna.