More data on dead wall wart

From: Dwight K. Elvey <>
Date: Thu Dec 9 18:55:36 2004

>From: "Fred Cisin" <>
>> > One year, at the West Coast Computer Faire, we repaired
>> > 5 TRS80 ones for other exhibitors ('spose the flaky power
>> > at Brooks Hall might be responsible?).
>> > We opened them by flinging them down onto a carpeted concrete floor.
>On Thu, 9 Dec 2004, Tom Jennings wrote:
>> Shag, berber, or ...?
>It looked like cheap commercial grade indoor/outdoor. But you could
>probably get full specs from Greyhoud Exposition Services - just
>don't trust anything that they say - at the time, they also claimed
>that it was anti-static.
>Fortunately, all 5 were just blown fuse, the common failure of those

 I've seen two types of failure for non-fuse warts.
One is that the primary wire blows on the top of the
primary winding but there is other visual damage.
This is almost always fixed by simply jumpering a new
piece of magnet wire ( should be the same guage to
provide proper protection ). The other is that
there has been some obvious over heating of the
primary wire. These are always fatal.
Received on Thu Dec 09 2004 - 18:55:36 GMT

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