... base comming magnet base Stainless steel whip 631 7~50MHz HF Antenna with spring base comming PL259 connectorStainless steel whip ... ELECTRICAL SPECIFICATIONS Frequency Range--------------------- 7.05/10.1/14.2/18.2/21.1/27/29.6/50.5 MHzImpedance------------------------------- 50 ... ).Huahong is a professional antenna manufacturer.Our main products include HF, CB, VHF&UHF, GSM&CDMA, GPRS, 3G/UMTS, 2 ...