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An interesting anniversary is the operation of the Very Low Frequency (VLF) Alexander alternator transmitter on 17.2Khz. The association Alexander preserves and shows the old ultralongwave transmitter in Grimeton, the only one of its kind remaining in the world, and still fit for operation!
For for visual and aural reception of these transmissions I have used the VLF sound card receiver associated with the Spectrum Lab software, my JRC NRD-345 receiver and the Mini-Whip active antenna designed by Roelof Bakker - PA0RDT (See Links Page), The sound byte is an actual recording of SAQ.
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