ขาย 3jPd Mini-Whip Active Antenna Assembled in Box HF LF VLF Mini Whip SDR RX Portable ราคาที่ดีที่สุด

Overview: New version, using modern BF998 and BCX54 semi conductors. Real class A circuitry, clean reception without IMD. One coax connection. Broadband R/C coupling to the receiver, no transformer. Technical Specifications: 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 PCB Size: Length (mm): 155 x 27 Connector: BNC Feed line: 50 - 100 ohm coaxial cable up to 100 meter long To note please: Each antenna performs as good as its installation permits it to. Any active antenna is not working good inside the house! It should be mounted OUTSIDE and as high as possible. Place this MiniWhip antenna PCB inside suitable enclosure of your choice and mount outside the house. Probably for the enclosure you can use a piece of the PVC tube which available in various diameters in a local store. Do not use metal enclosure! It wont work there! For max. sensitivity: - 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). For best signal-to-noise ratio: - 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. Package List as first photo shown