1950 Philharmonic 8200 Audio Issues

[Electronic M]

Suspect all tubes even ones you have newly installed. One of the longest times I ever chassed my own tail troubleshooting was when I assumed that the damper on a set that had worked prior to a recap had to still be good afterwards....the tube had randomly died and it took me borrowing it to use it in another set for me to get past my stupid preconceived notion that it couldn't have just randomly died.