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
Building A Magnetic Loop Antenna | Hackaday
Magnetic loop antenna might be a solution for 80m - KB6NU's Ham Radio Blog
Build a Magnetic Loop Antenna Controlled by Arduino | μF