"Alan Rutlidge" wrote in message
...

Gee Trevor, I've yet to figure out how some manufacturer's of SS equipment
manage to design that "timebomb" into their gear which magically goes off
just after the warranty expires. :-(

**Don't get me started. Back when I worked for a major importer, as service
manager, I received a highly confidential report into the reliability of the
manufacturer's products. They ranged from 0.5% to 100%, over the 3 year
warranty period. This was in the 1970s and the least reliable products (by a
considerable margin) were the quadraphonic (4 channel) ones. Though one of
my favourites (because, when it worked, it sounded bloody marvellous) was a
two channel power amp. Each one sold in Australia had to be repaired at
least 10 times during warranty. Owing to the complexity of the amp, each
reapir job took around 12 hours. From cradle to grave, the 300 amps
manufactured (world-wide) reportedly cost the company US$3 million.
Recently, I received similar information regrading the reliability of
another major importer's products from the service manager. It seems some
products are exhibiting a failure rate of a around 60%. And this is not a
fly-by-night, made in China manufacturer. It is one of the most respected
names in the business. It seems little has changed.


I have two multi-channel power amps which just after the 5 year warranty
ran out developed exactly the same fault (within a week of each other) in
exactly the same channel (left-rear). The in-built protection fortunately
activates protecting the speakers from damage as the output gets stuck
hard to the -ve supply rail. No components are faulty but exactly the
same PCB tracks develop dry joints which produced the fault. I just wish
I knew more people with the same model amp to compare notes to see just
how widespread the same fault may be.

**Which brand and model?


--
Trevor Wilson
www.rageaudio.com.au



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