Preamplifier for Hula-Loop RX antennaDesigned by RA0SMS in Russia
Assembled Amplifier for DIY HF Loop Antenna. Active HF Antenna AMPLIFIER project. Will work for receiving shortwave HF/SSB/AM radios.You set frequency range with hula-loop diameter and 5K tuning p...Read More…
Assembled Amplifier for DIY HF Loop Antenna. Active HF Antenna AMPLIFIER project. Will work for receiving shortwave HF/SSB/AM radios.You set frequency range with hula-loop diameter and 5K tuning potentiometer. Loop coil is not included, you need to make your own coil.
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. Manual station tuning is done with external 5K potentiometer. For example with 60cm diameter hula-loop turn you can get approximately 7MHz- 20MHz range. The PCB allows to connect additional parallel toroid coil (coils or toroid are not included) to shift the frequency range up by H/L switch (or you can switch between additional turns in loop to shift frequency range down).
You will get
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Russian Post: Standard Ground Rate
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