I can't see these devices specifically mentioned in https://www.ofcom.org.uk/__d... | Hacker News

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		gnfargbl on Nov 10, 2021 \| parent \| context \| favorite \| on: Cave-Link: Underground text communication system I can't see these devices specifically mentioned in https://www.ofcom.org.uk/__data/assets/pdf_file/0028/84970/i..., though the frequency range they operate in (20-140kHz) is allowed to be used by induction loop type applications, at a suitably low power.

ale42 on Nov 10, 2021 [–]

... but the cave link uses relatively high power levels (20-30 Watts if I remember correctly)

lazide on Nov 10, 2021 | [–]

Inductive stove tops are also In the KW range

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