HA!!
I found it.
Am stuck on the side of the highway near power lines parallel to me, and crossing highway ahead of me (which are maybe — all I can see — the cause of my rolling, heavy & solid S5 to S9 interference. Could also be an electric sign in front of a school).
After the sun came up I went from VERY close reception, to nada, zilch, zero.
So went to the King of CB, the side mic GALAXY DX-959b (new) in the KW to try to find a control panel “solution”.
GNF was the solution.
Underwater bubble-talk beats nothing at all.
Update: almost turned it off when Short Bus started coming in. (Skip, not terribly clear).
— Later, a pair of locals passed me going north and I can still hear them almost 20-minutes later (15+ miles, maybe more) and it’s devolved to nearly unintelligible. True that they both have good radios, etc.
But
Kick GNF off and they disappear.
The CB King comes equipped with The Galaxy Noise Filter. For that last, final, winning effort.
I sure like my GALAXY DX-99v2, but it ain’t side mic, nor does it feature the GNF.
During the war my late father-in-law spent part of it in ferrying P-51 Mustangs from Dallas to Long Beach and back. Part of the responsibility was engine break-in. Procedures. He noted that the throttle & tach had redline settings, but beyond that was a quadrant called War Emergency.
The 959b has a War Emergency setting.
.