MLA-30+ Plus 05-30MHz Ring Active Receive Antenna SDR Loop Antenna Low Noise Medium Short Wave Radio Short Wave(BNC) The MLA-30+ loop antenna is a popular broadband antenna Perfect for shortwave listeners (SWL) and amateur radio amateurs (HAM) in urban balconies, rooftops, etc._x000D_ This portable shortwave indoor loop antenna is a simple kit that includes all the necessary kits. Modular design, easy to install in limited spaces such as balconies and roofs._x000D_ Excellent directivity can help you reduce noise and improve signal-to-noise ratio; you can simply change the orientation of the antenna to align the virtual point of the antenna with the interfering signal, thereby minimizing specific near-field interference for best results ._x000D_ Noise suppression is up to 30 dB compared to longline antennas. It can dig out weak signals that are overwhelmed by noise. The 8-shaped pattern provides deep virtual dots to further reduce interference._x000D_ Do not connect to the transmitter as this will damage the preamplifier._x000D_ _x000D_ Listening to shortwave radio is an exciting hobby, but for city dwellers, the experience is often disappointing. We could hardly receive any useful signal, even for more powerful radio stations. Signals hide in all the different types of interference. Why is this happening? Urban radio frequency interference (RFI) has increased dramatically, and all kinds of poorly designed electronic devices have been found in every corner of the city. Interference is generated by LCD TVs, WiFi routers, poorly designed power adapters, powerline WiFi extenders, EV chargers, etc., all of which combine to cause interference in the shortwave spectrum. If there is a suitable place to set up an outdoor long-line antenna, the situation may be different. But when living in an apartment or condo, there is no roof to set up a long wire antenna. That's when you need the MLA-30+, a magnetic loop antenna for balcony setups._x000D_ Small, compact, low profile and barely noticeable_x000D_ Valid range: 500kHz to 30MHz_x000D_ Powered via USB, super convenient. A feeder is included for easy setup._x000D_ No manual adjustment required_x000D_ Colour:As Shown_x000D_ Material:plastic_x000D_ _x000D_ Package Contents:_x000D_ 1 x Antenna amplifier_x000D_ 1 x Stainless steel vibrator_x000D_ 1 x Bias power supply_x000D_ 1 x USB cable 0.8m(Random color, don't accept the specified color.)_x000D_ 1 x 60cm SMA jumper_x000D_ 1 x BNC connector_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_