HFU HF Underground
Loggings => Other => Topic started by: sat_dxer on September 17, 2018, 0222 UTC
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Sending cw until 0200z 17 Sept 2018 and using the CH (- - - -) Morse character
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un-id series of dashes at intervals 6699kHz; also // 8994kHz 1435z 16 May /21
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Waterfall screenshots & an audio recording might help ID the mode.