A new stylus includes all the moving parts of a moving magnet cartridge--stylus mounted to cantilever at the front end, suspension in the middle, magnets mounted at the other end of the cantilever, and the snap-in housing holding the whole thing together and aligned. The coils are permanently attached to the cartridge body interior.
So when you get a replacement stylus, you are actually getting the diamond stylus, the cantilever, the suspension, and the magnets. Getting a fresh suspension that comes with each replacement stylus should keep the cartridge fresh, although I suppose the coils might oxidize at some point, but I don’t know for a fact.
What is your buddy’s 30-year-old cartridge? I have had an AT150MLX for eight years and needed a replacement. AT was discontinuing the ATN150MLX stylus--gold-plated boron cantileverwith nude MicroLine stylus for the ATN150Sa--tapered aluminum cantilever with nude Shibata stylus. The few remaining boron/Microline stylii were taking on NOS prices; I got the Shibata version for $179.59 from Wal-Mart online, of all places. Snapped it into place and it sounds wonderful--sweet, smooth, and detailed without being distracting.
So when you get a replacement stylus, you are actually getting the diamond stylus, the cantilever, the suspension, and the magnets. Getting a fresh suspension that comes with each replacement stylus should keep the cartridge fresh, although I suppose the coils might oxidize at some point, but I don’t know for a fact.
What is your buddy’s 30-year-old cartridge? I have had an AT150MLX for eight years and needed a replacement. AT was discontinuing the ATN150MLX stylus--gold-plated boron cantileverwith nude MicroLine stylus for the ATN150Sa--tapered aluminum cantilever with nude Shibata stylus. The few remaining boron/Microline stylii were taking on NOS prices; I got the Shibata version for $179.59 from Wal-Mart online, of all places. Snapped it into place and it sounds wonderful--sweet, smooth, and detailed without being distracting.