[jcassity]

what i see is this.

the power supply from 1945 /46,, the 46-1226 code 122, runs 1 thru 3 match more like your 47-1230 !!!!!!!!!

so you are a 47-1230
I am a 46-1226

my gut feeling is Philco discovered the power supply revisions to allow for a pm speaker 46-1226 code 125 runs 1,2 & 3 sucked!  

since my model suckuthed with great magnitued, ,,,  what they did was build your set for 1947 but they re-employed the power supply of late 45 and early 46 model years.

so... there's probably a few serial numbers out there with my code 125 that are red headed step children.. with this goofy layout.

~~ my assumptions based on material evidence provided in older and newer prints from what i have all the way up to your posting above.
my 46-1226 code 125 run 3 radio was philco's first attempt to do a PM speaker.
they found issues after owners had complaints
they went back literally to the drawing board
They have shown you and I in writting that the code 122 power supply layout would work better so thus your 1947 radio mirrors a much older power supply layout.

this is probably why you didnt have the problem i had with having to calibrate a large resistor like i did.


here i have attached proof....  from older Left to right and then you!!,, your prints illustrate proof that the 46-1226 code 125 was inferior.. so in the year 1947,, they reverted back to an older layout from late 45,, to early 46 style for the power supply.

get it?
meaning this is why i cant help on your question.