| ??? 11/04/08 22:38 Read: times |
#159666 - Thermally destroyed power transistors... Responding to: ???'s previous message |
...very very often show a short circuit between emitter and collector. This everyone knows who ever has repaired hifi- or stage amplifiers. In such failure events nearly always the supply voltage of amplififer appears at output, making the voice coil of woofer melt, unless a protection circuit is present which disconnects the loudspeaker from amplifier by the help of relay.
Unfortunately, I don't remember what happened to the base in such situations. Kai |
| Topic | Author | Date |
| Transistor failure question | 01/01/70 00:00 | |
| no guarantee on behaviour | 01/01/70 00:00 | |
| stronger | 01/01/70 00:00 | |
| and... | 01/01/70 00:00 | |
| Thermally destroyed power transistors... | 01/01/70 00:00 | |
| can be both way | 01/01/70 00:00 | |
| When the die alloys then... | 01/01/70 00:00 | |
| Assumptions | 01/01/70 00:00 | |
| Question for Andy | 01/01/70 00:00 | |
| the worst case is... | 01/01/70 00:00 | |
| Assumptions; Conclusions; Guesses | 01/01/70 00:00 | |
| Jan is saying | 01/01/70 00:00 | |
| Worst case | 01/01/70 00:00 | |
| Let the circumstances be any? | 01/01/70 00:00 | |
| Incorrect! | 01/01/70 00:00 | |
| Not entirely true | 01/01/70 00:00 | |
| That's the point! | 01/01/70 00:00 | |
| Oh Andy | 01/01/70 00:00 | |
| No, it wasn't | 01/01/70 00:00 | |
| explanation | 01/01/70 00:00 | |
Not at all... | 01/01/70 00:00 |