No Paul,
It's the HT side and the Heater Circuit.
One saving grace, here, I bought the radio off of the guy, and before I ever worked as an Electrical Apprentice, I worked for a Motor/Transformer Rewinders, I've still got all of the charts and Formulae, from there.
I was just an after-school boy, who uesd to help out with rewinding coils, Xformers and Motors.
Not my cup of Tea, being locked up in a workshop all day.
I'll fix this one up, in my own time!. [Linked Image]