Radio ham’s 9 kHz VLF signal crosses Atlantic – Southgate Amateur Radio Club

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Radio ham’s 9 kHz VLF signal crosses Atlantic
Southgate Amateur Radio Club
The S/N is max on a bearing of 315°, which puts the prevailing southwesterly background nearer to the side of the antenna response.

Russ Roberts‘s insight:

Amateur Radio’s future may lie in the VLF slice of the radio spectrum. The ARRL reports that a low powered VLF signal at 8.971 kHz has crossed the Atlantic Ocean from North Carolina to the UK.  Using only 150 microwatts of power, Dex McIntyre (W4DEX) sent signals on 2 and 3 June which were received by UK SWL Paul Nicolson.  Nicolson used "sophisticated signal processing (DSP)" and special software to find McIntyre’s signal.  It may be somewhat ironic that amateur radio is returning to its historic roots by descending into the "radio basement" of VLF.  With so many of our shared VHF and UHF frequencies being "refarmed" for other communications purposes, the medium wave, HF, and low frequency bands may be the only places where ham radio operators can roam freely without fighting competing services.  I found a re-reading of Clinton DeSoto’s classic "200 Meters On Down" a worthwhile experience.  His book puts some needed perspective into this issue.  If amateur radio operators can solve the antenna issues on the frequencies below the standard broadcast band (below 500 kHz), we may have new uncharted territory to explore and use.  I’m going to take a serious look at 630 meters one of these days.  Aloha de Russ (KH6JRM).

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