. The paper cap on the left . Probabaly 30 years old. Amp has been stored a good while, but seems to have been exposed to humidity due to some rust around the fuse cap. The amp sounds marvelous; no clicks buzzes and hums. I have been advised to leave it alone untill it exhibits noise problems. I see the old paper cap is 1/2 discolored and its disconcerting to me. I've heard they can and do dry out and go "open" whatever that means..or even "short out" in teh worst case and cause cause major probelms. Ive heard to just leave it be untill noise problems occur, and Ive also heard to replace it as preventative maintenance.;
Note; the Spraque Atom on the right I am less concerned with, as it looks to have been more or less replaced along the way.