Active SDR Loop Antenna Amplifier 100kHz-120MHz Low-Noise Adjustable Gain for Shortwave Radio

1111MicrosoftInternetExplorer402DocumentNotSpecified7 8 磅Normal0Specification Operating Voltage 6V 15V DC Frequency Range 100kHz 120MHz for aviation and FM bands 100kHz 30MHz for shortwave signals Gain 0 400 approximately 40dB Gain Knob Color Blue or red depending on the production batch Product Net Weight 23 6g Dimensions 75mm x 35mm x 45mm Application SDR radio shortwave radios with external antenna ports Notes Requires a 9V 6F22 battery for power Not included Do not use a switching power supply due to EMI risks The antenna cable and SDR in the photo are for reference only This antenna is for receiving signals only not transmitting How to use 1 Once the battery SM cable and loop antenna are ready connect the SM cable s other end to the radio s external antenna port or SDR receiver input 2 Turn on the device the LED will light up when powered 3 Adjust the DX Local gain knob to find the optimal position clockwise for higher gain counterclockwise for lower gain Simultaneously adjust the loop antenna s position for the best signal Package Includes 1x Active Shortwave SDR Antenna Amplifier Board