Welcome to the forum Rus, I tried internet searches for that model number and looked on nostalgiaair for the schematic but I didn’t find anything. somewhere I have an RCA schematic CD and I need to find that to have a look on it ..any other numbers on the case or on the ID tag that might help in a google search?
It is a nice radio , it seems to resemble the shape of the Euro radios in some ways.
I think if you post the tube lineup it might help to use that to look at the specs for each tube to calculate the current draw. I am not the best at the calculations but if you refer to the tube data sheets for each tube , and add them up.
also sometimes the tube lineup might help in the searching for the schematic. any other model ID? you could also post for help with this under electronic restoration.
Phil