Odd repeating low-energy distortion (?) in recorded LP

Fascinating - I used ClickRepair when I transcribed my (and my wife’s) LP collection - and I never encountered anything like this.

The settings I (mainly) used can be seen a the foot of the first post in this sticky thread: https://forum.audacityteam.org/t/click-pop-removal-clickrepair-software/1933/1

Many thanks for the feedback, much appreciated.

WC