Hisonauto MLA30+ MLA-30 MLA30 plus Active Magnetic Loop Antenna HA SDR Short Medium Wave Radio Antenna Low Noise 500kHz-30MHz - AliExpress
Building A Magnetic Loop Antenna | Hackaday
Building a cardioid loop antenna with a Cross Country Wireless Loop Antenna Amplifier + by Chris Moulding G4HYG
Loop antenna - SAS-562B - A.H. Systems - radio / rugged / active
Amazon.com: MLA-30+ Loop Antenna,0.5-30MHz Active Receiving Antenna,MLA-30 Plus Loop Antenna for HA SDR Short Medium Wave Radio,with 10m Feeder,Built-in Low Noise Amplifier,for Rooftop,Balcony : Electronics
Loop Antenna (A3015)
DIY: How to build a Noise-Cancelling Passive Loop (NCPL) antenna | The SWLing Post