Save yourself touble and frustration by replacing all of the paper caps before powering up the set!. When i replace the paper caps, For the fun of it i test them on the way out only to find that less than one in twenty tests within the value labled on the part. Further more these old paper caps change value as they warm up and for the worse, Going up in capacitance and at best they screw up tuned circuits to worst case causing other components to burn up. Working sets with old paper caps tend to need adjusting (fiddling) juring usage, Conversly i find that my sets that have been recaped with modern replacements are rock solid stable and do not need readjusting even after days of sitting. By first replacing all the failure prone caps i have gotten fast results by reducing the need to trouble shoot multiple faults.
