via the ARRL: Tiny LF Signal Makes the Hop from Newfoundland to the UK

For Joe Craig, VO1NA, in Torbay, Newfoundland, things have been pretty exciting lately on VLF (very low frequency). He’s among the early MF, LF, and VLF experimenters in North America — active even before Canada allocated Amateur Radio bands in that part of the spectrum. He believes he accomplished a “first” for a Canadian radio amateur on October 22, when his very VLF, very QRP signal on 8.27 kHz (that would be the 36-kilometer band) was copied in the UK.

“After much effort on both sides of the pond, SWL Paul Nicholson in Todmorden finally copied a three-letter message,” he told ARRL. “It’s the lowest-frequency transatlantic message, made possible because of Paul’s EbNaut coherent BPSK mode and DL4YHF’s Spectrum Lab spectrum analyzer.” Even more amazing: The power was 10 µW ERP. Craig is permitted to run 10 mW by regulator ISED Canada (formerly Industry Canada). The transmission path was more than 3,500 kilometers (approximately 2,170 miles).

via American Radio Relay League | Ham Radio Association and Resources