[jrblasde]

Back to the 46-480 restoration, I did make another observation. I had previously commented that R305 was an 18 Ω resistor when I removed it from my chassis. According to both the Philco schematic and parts list, as well as the Rider's schematic, it was supposed to be a 150 Ω resistor. At the time I decided I would keep with the 18 Ω resistor, since that was what was physically installed. However, I now believe that this resistor isn't original to the radio. For one thing, take a look at it (the resistor on top). 

   

It's much shinier than some of the other typical resistors I removed. Now that I've discovered the AM-only Meissner IF can in place of the AM/FM Philco part, I am starting to picture that there was likely some sort of failure which prompted these replacements. I'm willing to bet that the serviceman who installed the 18 Ω resistor did so either out of error or to increase the gain of the signal being fed to the Meissner IF can since it is a double-tuned circuit compared to the unusual AM circuit in the Philco 32-4074 IF can. Thus, I now believe that I will match the 150 Ω value seen in the Philco documentation.