Grimeton Radio Alexanderson Alternator 17.5kHz

Today, the Grimeton Radio VLF transmitter was run on 17.5kHz.  This is a direct generation of the radio signal by a giant rotating machine, with liquid resistor dummy loads.

Test transmission as a WAV, recorded here in IO93NR UK:

The full telegram as an MP3, recorded here in IO93NR UK:

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