Thanks Jim, but that is besides the point here.
As I've been coached, when setting up a business you have certain calculations to correctly allocate resources... fixed and operational costs, variable costs, revenue streams, etc. and how they play with each other.
In the cost structure, so as to "predict" how much to manage your income, one of the variables is the life expectancy of gear. I treat my gear better than I treat myself, that is besides the point.
Like for instance, lets say a supermarket. The corporation KNOWS that 1 discrete fridge will last on average say... 5 years. So they're investment must take this into consideration in the "formulas" so as to account for maintenance, buy X brand instead of Y brand etc...
Same goes for cars in car rentals or taxi companies. Same goes for Optimods in radio stations, same for computers in any business, etc...
Some things are relatively easy (PC's, cars, moving parts mechanisms, valve amps, etc)
I'm scratching my head on transistor, well maintained, humidity controlled environment. My "coach" says 20 years, as I've shot at him, is totally irrealistic and a business-suicidal-tendency
