hemigreg
The electrical activity in copper when brought back to room temp will not be any better than with no treatment. ive done cross sections of copper/gold/silver/plat/irridium/plutonium/thorium/ etc in research for conductivity and transmission speed of the electron/hole pairs for semiconductor chip upgrades cause the time a Ghz signal enters a pc board to the time it hits the transistor junction in the processer does make a lag in the output. but that is only signifient in the GHZ freq range. totally silly effect in the khz and down. even high freq MRI magnets with cryo cooled power supplys are for the reason of lower resistance and no infulence in the resultant mri results- so if you think itsounds different its your $$ to waste. ive done it to liquid HE,H.O2, and colder.you may likely suffer more damage due to slip face kinda like embritlement in the lattice no matter how slow warmed up, the inital cold shock will offset the lattice a few minutes/deg. upsetting the outer 3-4 electrons orbit. yea.
otherwise copper is ultra stabil electrically and mechanically. cryo for fe based elements is a totally different reason.
>>>>Gee, that’s too bad. Must be mass hysteria or hypnosis. How else to explain all the many hundreds of thousands of cryod cables and fuses and vacuum tubes sold? Are all these cable companies that cryo their cables wasting their time and everybody else’s? Was NASA duped, too? OMG 😲