[Radioroslyn]

Good!  Next step would be using your generator connected to the grid cap of the 6L7 and the 6K7 w/ the generator set at the same frequency as the radio's dial. Listen for the signal and see if they track ( if you retune the generator up or down a bit can you retune the receiver and pick it you again at the appropriate frequency? If you can't receive any signals at the dial frequency then we will have a look at the local oscillator.

As Steve mention you can listen for it @ 470kc above the dial setting of the Philco. If you have a little shirt pocket transistor radio hold it near the 6A8 tube (assuming it's glass not metal, philco was big on GT's) and tune it around the prescribed frequency and see if you can hear a loud hiss in the transistor set. If the LO isn't working you'll need a tube extender to make like easier when doing the troubleshooting on this circuit. If you another 6A8 I'd try it in the set.