[Joeztech]

Take a look at similar chassis in the 1949 offerings and also look at some from 1950. Sometimes you will find modifications in the next year model that is similar or in a same model year unit that has similar circuitry. I notice that Philco used 9.1mHz FM IF frequency. This may make parts for their FM IF specific to Philco. At least they did show the value of the capacitors inside their IF and detector transformer circuits. Many manufacturers later just bought parts that already were assembled from various suppliers and never bothered to show the values of parts inside. The thinking was that repair would involve complete replacement of the IF or Detector transformer. The IF and Detector transformers were readily available back then at reasonable prices. Now they are unobtanium, except from another parts chassis or some old stock that may have survived on a shelf somewhere.

Joe