RX Magnetic loop for HF bands
PCB Dimension - 60*45mm
Power supply - 12VDC (100mA)
Active HF Antenna AMPLIFIER project
will work for receiving shortwave HF/SSB/AM radios
you set frequency range with hula-loop diameter and tuning potentiometer
Loop coil are not included, you need to make your own coil (simple way - RG6 coax)
Electrical circuit of this active antenna board based on high impedance differential amplifier wired across the loop. Frequency tuned with varicap. By selecting size and inductance of hula-loop turn you can set desired HF range of the antenna. For example with 60cm diameter hula-loop turn you can get approximately 5MHz- 15MHz range.