So, if all goes well...this weekend I should end up with the replacement H7140 PSU for my 11/44 chassis. In the intervening months since I got the system, I've cleaned up the boards a bit, fully washed and cleaned the backplanes, checked for any bent pins that were touching and straightened the few that were (as my eyesight isn't the greatest let's hope I didn't miss any important ones!). The board contacts were cleaned to an extent...they seem to just be a bit tarnished but I don't see anything that should cause a problem electrically. Most of the leaves have been pulled from the backplane (don't ask), thankfully as the 11/44 only sat outside a short while (less than a day) none got embedded in the backplane!
My RL11 is still the cleanest board with half a DEUNA set as the dirtiest...but I don't see anything that poses an /electrical/ problem. Any dust shouldn't be /highly/ conductive. No IC legs look utterly awful save for an 8085 I already replaced. Before power-up I will look over each board again very thoroughly (assuming the PSU even WORKS).
The last remaining problems are: no disks (don't have the UDA50 yet, don't have an RL11 emulator yet), and needing to find the pinout for the console. I'm betting it's differential like on the DLV11-J/SLUs for the 11/23+ but the docs didn't seem to mention much. Maybe my PDP-11 books will have more board info. I also unfortunately don't have the Floating Point board...but that SHOULDN'T be too hard to find.
Here's pictures of the chassis:
Populated with cards:
Board model numbers:
More will follow once I have the new PSU. If anyone has console pinouts, let me know!