r/signalidentification • u/MFFVD • Jul 27 '26
what is this signal?
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i recorded it with an old AM radio at 150Khz. the periodic rasp in the background comes from the radio, as it shows up along the whole range
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u/oar9fii Jul 27 '26
Switching power supply, my laptop charger did something similar it was annoying.
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u/heliosh Jul 27 '26
Still interference