Briefly, sferics, short for “atmospherics,” are RF signals in the VLF range generated by ... a scrap of PCB and a simple telescopic whip used for an antenna. Tuning into the Earth’s radio ...
The antenna though presents a problem. You might think that attaching a long piece of wire to the microphone input would be enough, but the problem is that due to the huge wavelength of the VLF ...
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