Strange repetitive low frequency signal

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Laurent54
Posts: 3
Joined: Thu Jul 30, 2020 5:56 pm

Strange repetitive low frequency signal

Post by Laurent54 » Thu Jul 30, 2020 6:16 pm

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.

Image

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

What could it be ?

Laurent54
Posts: 3
Joined: Thu Jul 30, 2020 5:56 pm

Re: Strange repetitive low frequency signal

Post by Laurent54 » Sun Aug 02, 2020 10:51 am

I've got another patern this morning :

Image

Laurent54
Posts: 3
Joined: Thu Jul 30, 2020 5:56 pm

Re: Strange repetitive low frequency signal

Post by Laurent54 » Sun Sep 06, 2020 5:44 pm

I've just uploaded again the picture :

Image

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

rtlsdrblog
Site Admin
Posts: 2738
Joined: Mon Nov 19, 2012 11:54 pm

Re: Strange repetitive low frequency signal

Post by rtlsdrblog » Tue Sep 08, 2020 12:53 am

An induction cooker is a good theory. Can you test it?

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