This morning, Kyle and Bubba finished removing the door to BSC1.  I entered the chamber and began poking the ITMY R0 Right BOSEM cable from the OSEM connection out through the structure to the Table Cable Bracket.  No change.  I then also tried all of the following which produced no improvement to the spectra:

- Reseating the cable in the Table Cable Bracket

- Unbundling the cables that were secured to the upper structure leg

- Reseating the cable on the BOSEM itself

- Swapped the RT cable with the Side - problem went away - which meant that the problem was the BOSEM itself.

Removed BOSEM from structure and attempted to find short on the unit - no luck.  Swapped unit which meant removing it from it's adjustment bracket and rebuilding before reattaching.

Once back on the structure found it was OK.  Set OLV and 50% flag setting.

Cleaned flooring, removed tools, looked for cable routing issues in case I undid some other nice work.

Left chamber.  Kissel ran a few TFs which showed healthy.  Fil checked for HIPOT on the ESD connection and started another rounf of ground loop checks.  Tacked up door.