Questions tagged [vlf]

Very Low Frequency is the frequency range 3-30 kHz.

Jump to Frequency Bands: | Band | Frequencies | Wavelengths | | ---- | ----------- | ----------- | | | 3-30 Hz | 10,000-100,000km | | | 30-300 Hz | 1,000-10,000 km | | | 300-3000 Hz | 100-1,000 km | | | 3-30 kHz | 10-100 km | | | 30-300 kHz | 1-10 km | | | 300 kHz-3 MHz | 100-1,000 m | | | 3-30 MHz | 10-100 m | | | 30-300 MHz | 1-10 m | | | 300-3,000 MHz | 10-100 cm | | | 3-30 GHz | 1-10cm | | | 30-300 GHz | 1-10 mm |

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Why are VLF EM waves labeled as "sonic" in ARRL charts?

In the ARRL Ham Radio License Manual (4th Edition) an Amateur Allocation chart labels VLF with "Audible Range": Very Low Frequency (VLF) 0Hz 10Hz 10kHz 100kHz Activities …
Jared
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How can I communicate with VLF ground waves

I willing to try really hard on working with Very Low Frequency waves to get a signal through the earth a few Km. How can I go about putting a signal at the frequency (probably near 10 kilohertz) into the ground? I have been searching for…
Skyler 440
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