Bogen CHB-50 Rebuild

[physics]

Alright, been working on this under the radar for a bit, got a new power supply board almost finished for it. While doing that, I noticed that the schematic calls for a 10R power resistor from one end of the plate winding to the voltage doubler (see picture below). Anyone have any idea why that is there or if it's needed? Only things I've thought of so far is that it's to limit charging current and maybe to act with the cap(s) as an RC filter, maybe some sort of voltage division scheme?
   

Thanks for any input!