[Radioroslyn]

Have had a few and serviced a few this is what I've found. Battery cable and ant/gnd wire the rubber will be flaking off badly. There's a small value e cap across the 90 line. It's there to keep the b+ clean. I've found some that are open. Best off to replace as if it's leaky it will drain your b batteries. 

Set is silent. Chances are the opt pri is open. This is problematic as Philco decided to use an output tube that has a pretty high plate load resistance 25K I think. At 20 or 25K they are difficult to find a small affordable matching transformer. There are other tubes w/the same pin out and a lower load and will make more audio. At 10K or lower you have a lot more choices. I think the 1A5 makes abt 100mw at 25K and the 1C5 makes 260mw at 8k.

If the volume control is noisy try to save it the best you can. They are expensive to replace because of the dual switch on the back.

Even though the output power seems rather punny with 1A5 and a quiet room it's not bad. With 1C5 twice as good but it does run the batteries down a little quicker.