(electronics) vacuum tube

use, usage

radio / (slang, dated) broke, having no money; dining and dashing (punning off of 無線 (musen, “wireless”) with the sense of 無銭 (musen, “money-less”)) / radiation (when used as part of a compound)

vacuum

(physics) vacuum: a region of space that contains no matter, a void / (figuratively) a blank, an empty slate

use, utilize

the past / ancient times

(not of a person) old, aged, antiquated

old

pipe / a wind instrument