[MrFixr55]

Hi Philconut,
Gulbranson is a piano and organ company that bought the Wells Gardner & Company in the early 1930s.

I have searched Nostalgia Air under both Wells Gardner and Gulbranson, but cannot find this model. The radio does show up in "RadioAttic, a seller of radios. The owner's name and phone # shows up there. You may be able to contact them to see if they are willing to sell you a schematic (or be real kind and give you a copy.
https://radioattic.com/item.htm?radio=0961621

From RadioMuseum:
Gulbransen Company; 816 North Kedzie Avenue, Chicago, Illinois - Trade names Champion Jr., Gulbransen. According to "The Music Trade Review", September 15, 1928, Gulbransen Company was at 3232 W. Chicago Ave., Chicago. They claimed then to have 1500 radio dealers in an advertisement and state: "In the piano business, Gulbransen has attained leadership that all recognize." Then they sold radios also with franchising outlets - only AC table and console models.
One has to distinguish between Gulbransen in Australia and in the USA.
Gulbransen exportet - for instance to Switzerland.

I did find a schematic under Wells Gardner A1 Series:
http://www.nostalgiaair.org/PagesByModel...023503.pdf

This is a 3 band radio with a similar tube lineup (a 6SJ7 and 6SK7 have the same pinouts, it is just that the 6SJ7 is a "sharp cutoff" Pentode while the 6SK7 is a remote cutoff or "super control" Pentode). The chassis does not look like the A1 radio shown in Radio Attic, however, that radio shows a 6Q7 near the 6F6 (If I am reading this correctly). Frankenradios!!