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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Have themPosted by N-set on: 11/16/2020
The GND noise enters somewhere past the input RCA's. And this GND noise is not the PP RFI/EMF.
RFI/EMF of PP looks like this:
This one is caught by my Decca cart (phono GND lifted) but similar is present in the air, caught just by measuring cables.
Time basis is still 5ms (vertical is 25x less than above). You can see the characteristic 'pumping' in regular periods (try to ignore the 50Hz hum).
That's probably the charger.
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