Lifespan of components?
How long can we expect a well designed component to last before it fails? I am assuming that eventually everything fails. I am looking at my system, and the oldest pieces here are in the 50 year range. Some components should be easy to replace if they fail- a capacitor, resistor of transistor, but other things not so easy- a transformer or an integrated circuit, and if they fail, their often unobtainable status means its the end if the road unless a parts donor can be found. In some ways I think it could be easier to give a 1960’s component a new lease on life after a failure than a 1980’s IC based wonder that has failed.
1965 Macintosh MR71. Still have a couple original Mac labeled tubes. Over the years, a couple choice caps in areas were switched out. Just has upgraded output jacks and original tuning cable replaced and indicator bulbs replaced. It gets daily use, sometimes I've neglected to turn it off and find it's been on for days. The plan is to keep it going for another 40, when I turn 100. The original Mac tubes will probably outlive me. |
@tablejockey I’m sure my MR78 will still be working in 40 years too, I just wonder if there will be FM radio; my concern is that when I kick the bucket my kids will be thrilled at the first $100 that is offered to them for the tuner.
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Capacitors die the quickest, start at 20 years. All failures are directly related to thermal cycling unless it’s a power surge problem. The 60’s through 80’s are not hard to service, even the IC versions. It’s when you get into the mid 90’s and later, servicing becomes a swap out board not component replacement procedure. |
"I just wonder if there will be FM radio; my concern is that when I kick the bucket my kids will be thrilled at the first $100 that is offered to them for the tuner." Zovato, FM, like OTA TV will always be around. Listenable music is the challenge. PBS is the only listenable choices with Classical and Jazz. R&R radio is long gone, unless your area has a station trying to hang on. Put specific instructions in your will -MR 78 gets sold to an audio enthusiast at current market value.
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Electrolytic capacitors have shelf life, used or not. No doubt heat plays a role in their demise, but even sitting new on a shelf will eventually make a difference. It is the gel used inside of them that will eventually change with time. Just physics. I had a PS Audio P500 which was still working, BUT some of the power caps were so dry they rattled. In this case, they weren't so old, but in heat environment that took their lives. |
