3/15/2024 0 Comments Vlf receiver experimental audioWarren Ziegler, K2ORS, who is on the Experimental license as WH2XBA/2, told ARRL that he and several other radio amateurs have obtained Part 5 licenses to experiment on 500 kHz and on 137 kHz. “As far as I know, these 29.499 kHz VLF signals are the first amateur VLF to span the Atlantic - fantastic results by well-equipped stations using suitable receivers and good software.” He said that signals on 74 kHz were “well copied,” but that “the surprise” was detecting the 29.499 kHz signal. “In recent weeks a number of amateur tests have been running from the USA to Europe around 74 kHz and at 29.499 kHz using several hundred watts to large antennas,” blogged Roger Lapthorn, G3XBM. Nicholson also copied a 29.501 kHz transmission from Dex McIntyre, W4DEX, in North Carolina, operating as WH2XBA/4. His very slow-speed (QRSS) CW signal was initially detected in the UK just before 0000 UTC on March 3 by Paul Nicholson, an SWL, and later by Mike Dennison, G3XDV, and Markus Vester, DK6NM, in Germany. Bob Raide, W2ZM, was transmitting on 29.499 kHz under a Part 5 Experimental license, WH2XBA/1. In what’s believed to be a “first,” a very low frequency (VLF) signal from a ham radio experimenter in New York was heard across the Atlantic.
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