There’s certain times there will be numerous of unknown frequencies that are not listed even in the WRTH handbook. 25m is more common but there’s some with mysterious sounds. Plus depending the time and so on. 25m is better during the day depending your time in your area
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25m is a ham radio band, so could be digital modes like SSTV images. It can be also a pirate transmition but an audio or video recording could be useful. You can record the waterfall with KiwiDX.
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It’s international shortwave it’s like china int
yes I agree with you
you’re right 25m it’s a broadcasting band not a ham radio one, my bad, that was a mistake.
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It’s ok 
Rome was’t built in a day no harm done