How long will they last?

Dunno about roms and eproms, but I have radios that are 50 years old and yeah, electrolytic caps do have a finite lifespan. They dry out. Mind, these are the old wax-cardboard wrapped kind and not the kind in the metal cans. But unless you're dealing with eniac and it's tube fired bretheren I'd not yet worry about your caps - or your resistors - yet. Also bear in mind that tube radio equipment gets a lot hotter than your computer does inside (right?) -- Jim Strickland jim(a)calico.litterbox.com -- By Caffeine alone my mind is set in motion. Through beans of java thoughts acquire speed, the hands acquire shakes. The shakes become a warning - I am in control of my addiction! By Caffeine alone my mind is set in motion. Adapted from the Mentat chant of _Dune_