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I have found it interesting that toroids work when caps and coax don't work. Toroids are my go-to for rf noise.

I use these internally in radios A nextion display really benefits from them.

These on power cords and baluns.
and these around coax with PL259.

I bought 25 of each and thought that should last me a while. Ended up using almost all in 2 days. Shack noise when down a couple of S units. Wall worts have been particularly bad.