[Tucker]

Do you typically replace the older Philco resistors ?  I’m referring to the ones that Philco used in the 30’s and early 40’s radios? I recall reading a post a while back where someone mentioned these resistors usually are not as reliable as others. 
I’m asking because the Philco 40-180 console that I recapped a few years back started to lose the signal after about 45 minutes of playing. I tested and swapped out the tubes and the issue was still there. I then decided to replace the original resistors that tested good when I recapped the radio and the radio plays good now. 
I did find that one of the original resistors had a hairline crack that wasn’t visible as it faced the chassis.