Cydrome Leader wrote:

KenO wrote:

A friend recently had her audio system damaged from an AC Power Surge.


** AC power voltage surges damaging audio gear are so rare that I cannot accept it as true without convincing evidence.

The DC power supply inside each piece of audio gear usually contains a transformer, rectifier and filter electros - a combination that eliminates AC voltage spikes/surges better than anything you can possibly buy or build.

That may be true if the stereo or whatever is not attached to other
devices. Once you connect things together, damage from power surges starts
to happen.


** My comments were intended to exclude the effects of a lightning strikes hitting the ground.

AC supply voltage spikes are normally caused by inductive loads going on and off.


OTOH, the term "power surge" is regularly used to explain away sudden failures in almost any electronic device - when the real cause is simply a bad component.

power surges and the damage they cause are very real problems.


** If by 'power surge' you actually you mean lightning strike.




.... Phil