[Nathan Slingerland]

That's a really good question about that bakelite block. I don't see it mentioned in the service bulletin - or in the changes for models document.

However... it is not unique to that Philco 45! Here's a picture from a *different* Philco 45 chassis that I worked on:
[Image: http://i1072.photobucket.com/albums/w374...htm0dd.jpg]

As you can kind of see from that angle - it's part 3615-BM. According to the 'Philco Condensers and More' book - 3615-BM is a 0.1uF (actually two 0.05uF in parallel) cap.

It's connected between ground and the junction between those two 70K resistors (parts 36 and 37). Which makes it part 41. That's shown on the parts diagram as a tubular capacitor (30-4170). Note that capacitor is missing from both photos.

And one last datapoint - discussion about this same mystery block on the AR forum:

http://www.antiqueradios.com/forums/view...&view=next

So there are at least three Philco 45Cs out there with that block instead of a tubular cap. Which one any of the rest of them have it's hard to say.