A portable VLF preamplifier

This portable VLF preamplifier will plug into a phone, tablet or laptop. Software can display a live spectrogram of the signal or record it for later analysis. The portable system is useful for tracking down sources of VLF interference and for performing site surveys when installing a fixed VLF antenna.

Last update Oct 2018: Added link to Spectroid software by Carl Reinke

Back 30 Sep 2018