HFU HF Underground
Loggings => MW Loggings => Topic started by: jFarley on October 31, 2016, 1425 UTC
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A mystery beacon, presumably near or in the Gulf of Mexico, putting a very good signal into Chicago.
Approx +/- 400 Hz offsets.
SAC has been the call used by Southern Avionics Corp while testing NDB transmitters prior to shipment, so...