[7chip7]

Here are 2 photos of the chassis , one photo shows my original , and the other is another 37-61,  you can plainly see both blocks. There are resistors  and other wires connected to block 46,  (top of  photo), the AC line block is bottom of photo.  both blocks have caps inside, I rebuilt both blocks. The schematic shows how the ac line hooks to the bottom block, but does not show the top block wiring.  
Chip