[mikethedruid]

I've been reading your thread, Del, and here are some thoughts. First, I trust you have replaced all the paper condensers and the electrolytic condensers. That should be done before anything else. Now, with the problems you are describing, check all the resistors with the radio OFF and UNPLUGGED. Any that are beyond their specified tolerance (usually 20%, but sometimes less, as will be noted on the schematic, and with a gold (5%) or silver (10%) marking on the resistor) should be replaced. Last, I have a trick I use for injecting the IF frequency into a radio. I took a toilet paper tube, and have wound a coil of 22 gauge PVC insulated wire around it, about 30 turns. I put a .01mfd condenser in series with it, and feed this directly from my signal generator, the other lead of the .01 mfd condenser to the signal lead from the sig gen, and the other end of the coil connected to the ground lead from the sig gen. I slip this over the mixer oscillator tube, and it induces the proper IF frequency into the tube. This doesn't work with metal RCA tubes, but you shouldn't use them in a Philco anyway. One can also detach the grid cap wire from the mixer oscillator tube, and inject the signal directly there, using a .01 mfd condenser in series with the signal lead from the sig gen. Lastly, for adjusting the little variable caps in the IF cans, I made a little brass screw driver from some 1/16" dia. brass rod you can buy online or at Home Despot by grinding a straight blade on one end, and bending the other into a handle, then insulating the handle with a layer of black electrical tape. Works great, and is non=magnetic, so it doesn't influence the IF response of the coils being adjusted. I hope these tips are of help to you. Good luck !