Finally had time to write this up, only took a bit over a year

http://www.glitchwrks.com/2018/07/09/rx211-repair

I picked up this RX211 in pretty rough shape, the switchpack was busted off, it was missing the bus grant plug -- it was of course sold AS-IS! I happened to have Herb Johnson's PDP-11/34a on my workbench, so I finally had a good excuse to repair the RX211 and get it tested. Works fine after repairs! Ultimately it's for my PDP-11/10. Unfortunately the 11/10 smoked after getting it set up and ready to install the RX211. Mere coincidence I think. I believe it was something in the AC LO/DC OK circuit in the power supply as I believe all of the regulator modules tested OK.