The value of any electrical component can sway over time. Focus on resistor upgrades as well. If chokes and transformers have values written on them then have them checked too.
The tonality may change in varying levels for every item that you swap. Try changing out resistors and caps of similar composition to retain as much of the amp's current tonality as possible. I know from experience.
The tonality may change in varying levels for every item that you swap. Try changing out resistors and caps of similar composition to retain as much of the amp's current tonality as possible. I know from experience.