[Boatanchors] RAL - Selenium Rectifier Stacks

[Bill Mellema]

Guys,
I'm in the process of refurbishing a RAL HF receiver for the USS Wisconsin. There are two selenium rectifier stacks, one single plate and the other multiple plates installed next to C119 - suppressor grid filter for the 6D6 detector tube. They are not on the schematic and they are not pictured in any of the under chassis shots. The mutliplate selenium is connect directly to C119.
If anyone can put some light on these I would appreciate it...
Thanks,
Bill N3WMUSS Wisconsin radio gang