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One other thing I have found in these Philcos is often bad brittle wiring. Some of these we have done have needed all wiring replaced, including disassembling the power transformer and IF cans and re-insulating the wiring with heat shrink tubing.
It is a lot of work but usually once you replace all the caps and the wiring it will work...sometimes we have had to adjust alignment for best performance.
It may be better to start on a simple radio such as a later table top 5-tube model which is simpler...once you learn the concepts of how the circuits work this applies to the larger sets too.
We have had no trouble at all finding good new capacitors for tube equipment, there are several sources.
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