High-Impedance Resonance Donut Loop Antenna - Purpose and performance This narrowband high-impedance resonance antenna is designed for receiving medium and shortwave signals. It is optimized for use with the Malachit receiver’s high-impedance input, delivering strong signal reception and reducing interference. - Frequency coverage and options The blue shortwave SW antenna covers 4 MHz to 24 MHz, allowing tuning of a wide range of shortwave transmissions. The red AM antenna is intended for medium-wave reception from 500 kHz to 2000 kHz. Choose Blue, Red, or Red + Blue for your preferred antenna configuration. - Portability and weight The donut loop antenna is compact and lightweight. The set weighs 90 g in total, with 60 g per single antenna, making it easy to carry and install for portable use, outdoor activities, or travel. - Practical use scenarios - Field or camping setup: use the blue SW option to listen to international broadcasts or weather transmissions, and the red MW option for local AM stations. - Travel and emergency preparedness: carry a lightweight antenna set to quickly establish reception in various environments. - Portable radio hobbying: combine red and blue configurations to cover both shortwave and medium wave when operating a small field station.