Some of the Philco split-chassis sets:
51 Ad:
http://tvhistory.tv/1951-Philco-Brochure.jpg
52 Ad:
http://tvhistory.tv/1952-Philco-Brochure1.jpg
53 (no brochure on tv history site)... typical non-UHF table model:
http://tvhistory.tv/1953-Philco-2124.JPG
54 Ad:
http://tvhistory.tv/1954-Philco-Brochure1.jpg
55 sets look slightly different, but are possibly split chassis (I don't know):
http://tvhistory.tv/1955-Philco-Brochure1.jpg
From:
http://tvhistory.tv/
My 17 inch 53s are 53T-1853 (mahog. console) and 53U-1827 (Birch? table model)
My '51 16 inch round CRT set (1634-M?) has a power transformer and 5U4s... My '53s do not. I' m digging... but I don't think I have a schematic for the '51 set.
Eric's lovely 21 inch Philco :
http://www.vintagetvsets.com/philcof.htm
jr