[Radioroslyn]

Ok so here is the data sheet for the 7C6 first audio tube in your Philco.
http://www.shinjo.info/frank/sheets/084/7/7C6.pdf When you look at the base diagram you are looking at the bottom of the tube. There is a round peg in the center with a small locating hump on it. As you look at the bottom the pin to the left of that small hump is #1 Counting clockwise around the last pin will be #8 just to the right of the small hump.
On the diagram that hump is noted by an arrow.

<Your pot isn't wired properly as per the diagram. The terminal to the right should be connected to the chassis. the next one <should have a .01 going back to pin 3 of the 7C6. The terminal to the left should be connected to .01 cap that goes to the <junction of two 470k resistors and a 100uufd cap. Double check your wiring and report back.
<Terry
< Looks like you've got a short where the .01 is connected to the terminal strip.
If your amp is working you should be able to touch pin 3(input to the amp) of the 7C6 and it should make a loud buzz.
Terry