So, recently my wife and I had a bit of a discussion with our cable company, about a malfunctioning cable-modem. Plus, we changed a few things about our account, for various other reasons.
Upshot: we now have a different model of cable-modem. Result? RADICALLY improved short-wave listening experience. WAY lower noise-floor (due to much better shielding on cable-modem device).
Impressive, to the point that I am now actively interested in getting more “into” both short-wave listening AND Ham radio (previously, the noise-issues were disheartening to the point where I was…..discouraged as to whether I would ever solve them adequately.