linuxaudio.org

On Wednesday, May 09, 2012 08:35:36 PM Ralf Mardorf did opine:
> On Wed, 2012-05-09 at 12:02 -0400, gene heskett wrote:

quoted text
> > Could=cold=microscopic crack in the solder?

>

> No a perfect looking joint had no contact to a pin, it only had conatct

> to the board.

>

> > I'm not familiar with that particular diode.  However power rated

> > switching diodes that fast really stretch the limits of the

> > technology, so I would expect a higher failure rate for that compared

> > to the 3 to 20 microsecond recovery times of a more normal power

> > diode.

>

> Indeed. the HER 303 with 50ns is the second fast diode we found. Thomas

> searched a lot and found another diode with 25ns or similar fast. He

> never has seen such a fast diode in another switching supply.

>

> I don't have any experiences. Yesterday I learned it and why just one

> diode is needed.

>

> > 3 kilovolts peak

>

> That's why I would like to live in a house with several stages of

> overvoltage protection. Those spark gap thingys from the DYI market or

> the same crap 100 * more expensive from the musical instrument dealer

> won't help if this happens. Even if the peak would be slow.

>

> > Light bulbs and small equipment fuses didn't last as long as they

> > should have for obvious reasons.

> :

> :D

>

> And it easily could go through the computer too.

fortunately, the closest thing to a computer in those days was my TI SR-51.

Except for a few mainframes that cost millions, computers as we know them

now, were still a decade in the future, this was the '70's.
> Regards,

quoted text
> Ralf

Cheers, Gene

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