HFU HF Underground
Loggings => HF Mystery Signals => Topic started by: nickcarr on January 15, 2016, 1132 UTC
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What do you guys think? Very strong in Japan. Sounds like low frequency pulses in AM mode. Thump Thump Thump. Perhaps 2-3 per second.
Looks cool on the waterfall:
(https://www.dropbox.com/s/hurit2kbdboncha/14950japan.JPG?raw=1)