Intermittent distortion

[pofofo]

Thanks for the info. I ordered some leaded solder and will reflow.

 

[pofofo]

Yup, you were correct. Its the 4G mobile internet thats causing it. Thank you for your help and patience.

Now, is there anything I can do to avoid the problem (other than not using my phone that is)?

 

[Paul Birkeland]

Distance should help a whole lot, but some phones are just really noisy.  It's possible that some aluminum foil wrapped around the tubes and touching the chassis might help. 

If you use airplane mode and have a wifi connection, that should resolve the issue and leave your phone fully functional too.

 

[pofofo]

With the phone hooked up to the amplifier, I heard the noise while turning on/off airplane mode.

Then I had the airplane mode off and turned off/on: wifi, bluetooth and 4G separate the noise did not appear (I was trying to pinpoint exactly what was making the noise). The noise only appeared when I turned airplane mode off/on.

With my laptop hooked up (and streaming via wifi) there where no noise, so it seems the phone needs to be hooked up to the amp for the noise to be heard.


I don´t know if it matters, but my phone is a Samsung s10e from 2019.