I have been told that this radio was built by a local radio station engineer.
I was able to improve the function of the "IF filter transformer" by adding a .001uf cap to the .00025uf caps on both windings. It looks like this may have been a common problem caused by the confusion created by changing the make and value of the IF transformers several times during this model's production time. That transformer is shown in the video below.
Still a bit of mystery. The radio was built with a 0 - 1.5 amp meter. It was built with General Radio tube sockets for 201A tubes which have a total draw of 2 amps (8 times 1/4). The ads for the radio claim that it could be built to use almost all of the common tubes that were available at the time. It is possible that the radio had been built for 199 type tubes using an adaptor base.