1.7 Khz ULF VLF antenna ultra low frequency weather proof narrow band scientific

1.7 Khz ULF antenna ultra low frequency weather proof narrow band scientific. This narrowband, 1.7 kHz factory pretuned ultra low frequency antenna is tuned to the ionispheric radio propagation cut off frequency. This is the lowest radio frequency that can travel in the earth-ionosphere natural waveguide. The antenna is useful for scientific research. The antenna features a 50 ohm BNC output jack.

The 1.7 kHz frequency is the base frequency of the'Tweeks' that occur at night which are caused by the atmospheric dispersion of lightning static.

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