Doesn't excuse CHU: two 3kW, one 5kW ERP.

And by the virtue of shortwave propagation, it could be heard across the world. For the past month and a half (from when the news of its impending shutdown was revealed) I was regularly picking it up in Australia right up until the bitter end.

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ggm 3 hours ago | parent [-]

Wave skip? (Naieve question)

	▲	yakkers 12 minutes ago \| parent \| next [-]
		HF propagates through skywave (most reliably from 5-30MHz), which is where the signal bounces off the ionosphere. In the MF (AM broadcast) band, you can observe this at night - in Australia I can pick up the 50kW Melbourne ABC station (public broadcaster) at 774kHz with a good radio, just about across the entire country. In the LF (longwave) band, the earth’s surface and the ionosphere start to behave more like a waveguide than skywave. This is actually more reliable/consistent than even HF, but you need massive transmitting antennas due to the large wavelengths involved. HF also generally wins for distance covered per watt - despite the massive power of Radio 4 longwave, I’d have no chance of hearing it reach Australia.
	▲	intrasight 2 hours ago \| parent \| prev [-]
		https://en.wikipedia.org/wiki/Skywave Bounce off ionosphere