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Strange repetitive low frequency signal

Posted: Thu Jul 30, 2020 6:16 pm
by Laurent54
Hello,

Sometimes on the evening, I receive a strange signal between 25 and 300 khz. The signal is repetitive (5 seconds of Tx and 5 seconds of blank) and constant. The signal never lasts more than 1 hour.

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I guess the origin of the signal is near my house due to the presence of harmonics.

What could it be ?

Re: Strange repetitive low frequency signal

Posted: Sun Aug 02, 2020 10:51 am
by Laurent54
I've got another patern this morning :

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Re: Strange repetitive low frequency signal

Posted: Sun Sep 06, 2020 5:44 pm
by Laurent54
I've just uploaded again the picture :

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I've noticed that I've receiving the signal often during lunch time. Induction cooking can produce this phenomena ?

Re: Strange repetitive low frequency signal

Posted: Tue Sep 08, 2020 12:53 am
by rtlsdrblog
An induction cooker is a good theory. Can you test it?