[Arran]

Sorry it took so long to reply, I've been having computer problems for the past week. The rectifier tube is supposed to be a 5Y4 not a 5V4, if the power transformer is still the original unit I would replace the rectifier tube with the proper type as the 5U4 draws more filament current then the 5Y4. Also if it still has the original power transformer there is no advantage in using a pair of 6L6s in this radio as it will not have enough anode/plate/B+ voltage to make use of them. The originals were supposed to be 6F6s but 6V6s are a viable substitute. As for the cabinet Philco would sell just about anything to anyone who wanted it, they would even sell just a chassis. I'm not sure about Brazil in the 1930s and 40s but Philco had branch companies set up in many countries including Argentina so that cabinet may have been locally produced and a left over Tropic chassis fitted to it as the cabinet is a 1941 design and the chassis is a 1939 design. That phonograph is a post war unit, it looks identical to one I have in a Meisner portable unit from about 1947.
Regards
Arran