As several of us just talked about in the control room, if The Noise is happening when folks are on site and there's a plan of a thing to try, please feel free to drop Observing to check. I think we'll keep the list of things to try elsewhere more dynamic than the alog (probably the LHO commissioning google doc). Some examples of things that we're thinking of right now are (a) turning off the HAM1 FF, or (b) walking (gently) around electronics racks (CER, EX ESD driver area) to see if we can hear any electronics 'whining' or otherwise going bad.
Please do send me a mattermost message, which should audibly ping my phone, but this is causing such problems for our data quality that there is no need to wait for a response from me before trying something.