Get a ferrite ring for your cable, solves more of these issues than you'd imagin...

dmix · on July 1, 2022

I had no idea these existed. This is going to moving make my tube amp so much less annoying. Thank you.

projektfu · on July 1, 2022

An isolation transformer might also help.

fifteenforty · on July 1, 2022

They used to be common on USB cables, especially USB A to B cables for printers. Not sure why they disappeared.

q-big · on July 1, 2022

> Not sure why they disappeared.

Likely cost savings combined with design considerations ("these knobs look ugly").

neurostimulant · on July 1, 2022

Those are ferrite cores? I thought it was covered solder joint or something.

stoobs · on July 1, 2022

Nope, clipped or glued ferrite, you used to also get them on power cables for certain devices