That transformer is a serious piece of iron. About six inches tall. I have a special machine for moving these heavy chassis. It's called my 23-year old son
On this chassis I spy two 5U4Gs and one 5V4 by the HV cage. Not sure if I have the right papers for this set. The crumpled schematic lists RA-103/104A/110A and shows two 5U4gs and two 6X4s. Eventually, I should get the right schematic. The serial plate in back says RA-103, serial #27171.
I'd love to get knobs for this set. The seller told me they were all lost, but last night I went through the box of spare tubes (39 good ones --Yay!) and found this one. So I need four more like this, plus the big tuner knob.
Phil