-Caps - 30% increase or just different but not better
-Diodes - 30% increase
-Fuse - 10% increase
-Damping chassis etc... 2 -5% increase
-New footers - 2 -5% increase
-Power cable - 5 - 10% increase
-Replacing Potentiometer with like a TKD or better than the basic Alps or nobel whatever it is in the unit can be a - 15% increase
-RCA's - depending on Resistance, if you go with a new gen WBT or something maybe a 2 - 5% increase
All this depends on how that unit reacts with the selection of new parts vs. another unit. Also how easy this unit is to work on, and how many values you can see or figure out on the parts to actually replace them.
Some are more effective in certain flavors, some are not. Tubes are easy, try them, but that's gonna cost you as much or worse drive you crazy buying NOS and not finding a happy spot!
-Diodes - 30% increase
-Fuse - 10% increase
-Damping chassis etc... 2 -5% increase
-New footers - 2 -5% increase
-Power cable - 5 - 10% increase
-Replacing Potentiometer with like a TKD or better than the basic Alps or nobel whatever it is in the unit can be a - 15% increase
-RCA's - depending on Resistance, if you go with a new gen WBT or something maybe a 2 - 5% increase
All this depends on how that unit reacts with the selection of new parts vs. another unit. Also how easy this unit is to work on, and how many values you can see or figure out on the parts to actually replace them.
Some are more effective in certain flavors, some are not. Tubes are easy, try them, but that's gonna cost you as much or worse drive you crazy buying NOS and not finding a happy spot!