Franko, your opinions are always entertaining. But, aside from what you and your brother think capacitors have a lifespan rating. Here is how it is is calculated so you know the facts. Surge really has nothing to do with it unless you used the wrong voltage rating in your design.http://www.illinoiscapacitor.com/tech-center/life-calculators.aspx
No offence Amiga92570 but it's not what I or my brother in law think nor is it based on average lifespan ratings, it's based on both scientific tests that were carried out by the manufactures & experience...

Lifespan ratings are based on what you should expect on average from a capacitor being run under normal load and tested upon the capacitors being powered up x amount of times...

The tests in the late nineties carried out by different manufacturers and independent labs showed a number of factors come into play with regard to their lifespan that make the tables you speak of pretty pointless and more of just an average guideline for circuit designers...

The tests and results proved that the more times a capacitor is powered up the shorter it's lifespan as explained previously and that also a simple thing like leaving an item for years without ever being powered up at all, the damage done in the first initial power up after all those years can and often does significant damage to the capacitors or blow them altogether...

If I were to believe the lifespan ratings that you speak of then both my Microvitic Monitor and my 1084 Monitors should have had needed most of their capacitors replaced years ago with the length of time I've been running them virtually non stop (not to mention my Amigas) but they haven't...

Of course lots of other factors come into it too, mainly the quality and formula used in the manufacture of capacitors, just ask Apple about that one in regard to their problems with capacitors a number of years ago...

At the end of the day I'm satisfied by both what I've read & experienced and been told by not just my brother in law but lots of his acquaintances who were also in the same lines of business as him, who all agree on this matter and many had claimed for years before these tests that this was indeed the case and the tests just confirmed their beliefs...
