Strange repetitive low frequency signal

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Laurent54
Posts: 2
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.

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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 ?

Laurent54
Posts: 2
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

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