Long story short, I was working on an audio amplifier. I found the problem, insulation film isolating 6 mosfets from the case/ground was contaminated and 2 were basically bypassing the gate and were WFO. I tested the circuit with the speaker hooked up which emitted a very loud hum. I only switched the amp on 3 times for less than 1 sec but just not sure what kind of power it tried to pull during that time.
I got the problems worked out in the circuit and system was running fine until I went to add some coal to the fire and the full wave bridge rectifier shorted from + to AC and popped the main fuse. I was curious if a bridge can degrade from surges or if they are just good or bad? Do they typically fail shorted? I was also a bit concerned of any damage down the line from the short but This is at the very front of the circuit and things are testing good so far.
I got the problems worked out in the circuit and system was running fine until I went to add some coal to the fire and the full wave bridge rectifier shorted from + to AC and popped the main fuse. I was curious if a bridge can degrade from surges or if they are just good or bad? Do they typically fail shorted? I was also a bit concerned of any damage down the line from the short but This is at the very front of the circuit and things are testing good so far.