Function: using modern BF998 and BCX54 semi conductors.Real class A circuitry, clean reception without IMD. coax connection.Broadband R/C coupling to the receiver, no transformer. Features: this antenna should be positioned as high and free from metal conductors as possible. the ground plane of the PCB must NOT be lower than the top of the mast. (the connection to and the antenna surface itself must be ABOVE the top of the mast). install the Miniwhip onto a well grounded mast. connect "GND" of the Miniwhip PCB to that mast. place HI-Ui ferrite cores (Ui between 5000 and 10.000) on the beginning and end of all cables to block cable noise currents. Specification: Frequency range: 10 kHz - 30 MHz Power: 12 - 15 volts at 150 mA Second order output intercept point: > + 70 dBm Third order output intercept point: > + 30 dBm Maximum output power: in excess of - 15 dBm Connector: BNC Feed line: 50 - 100 ohm coaxial cable Packing list: Shortwave Antenna Set*1 Function: using modern BF998 and BCX54 semi conductors.Real class A circuitry, clean reception without IMD. coax connection.Broadband R/C coupling to the receiver, no transformer. this antenna should be positioned as high and free from metal conductors as possible. the ground plane of the PCB must NOT be lower than the top of the mast. (the connection to and the antenna surface itself must be ABOVE the top of the mast).