Why does everything break?

A question that arises every once a while is ones life. This time time the reason for this throught was the fact that we were getting telephone calls that no-one was receiving the station on their radios. So we rushed to the transmitter to find that the forwarded power by the transmitter was almost zero, while it should be about 700 WATT. We were quite devastated by the fact that a brand new 5000 Euro transmitter broke within six months. The volunteers on the contrary were convinced that 'we will win', so with that spirit we've opened the transmitter but couldn't directly find the problem. We were happy that the end exciters didn't burn out completely. For some time we were thinking it was maybe a problem of too less current on the power net, but this wasn't the case. So we started e-mailing with the manufacturer in Italy. The procedure is like this: we describe what we see/measure, and they email us back with their conclusions and new point to measure. Today we probably found the problem: two broken transistors. But we are waiting for a reaction from Italy...