[Trevor Wilson[_2_]]

"Arny Krueger" wrote in message
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"Trevor Wilson" wrote in message
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"Arny Krueger" wrote in message
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"MiNe 109" wrote in message
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In article ,
"Trevor Wilson" wrote:

"MiNe 109" wrote in message
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In article

et,
Jenn wrote:

...of listening to music through home audio equipment. In about 35
years, for all of the gear I've had, from Sears on up, I've had a
power
switch on a SAE amp go out after 3 years of use in 1983. That's
it. Am
I lucky, or do you have similar experiences?

I was surprised to learn that my Linn electronic crossover required
more
than one hundred fifty replacement capacitors. Then I found my Linn
amp
needed a similar action when I plugged in the newly repaired
crossover.

The capacitors on my LP12 power supply died a couple of years back.
I
wonder if these Linn capacitor failures are a coincidence.


**Read the specs on capacitors sometime. It's quite scarey.
Electrolytic
caps are usually rated to XXXX hrs @ 85oC or 105oC. The better the
cap, the
more hours and the higher the temp. Naturally, the cap is derated, as
the
temperature rises. A typical cap found in a domestic product would be
rated
for around 5,000 hours @ 85oC. A mil-spec cap might be typically
20,000
hours @ 105oC. The difference in cost would be substantial. Keep your
caps
cool. Fan cooling is best.

My repairman used mil-spec replacements for about the same price Linn
would have charged to renew the original parts.

He was probably marking those mil-spec parts up fantastically. In small
volumes, the actual additional cost of a more competent part obtained
competently is usually only marginal.

**Possibly. I just checked my supplier. For a typical decoupling cap
(such as that used in a crossover) the cost of a regular 85oC rated part
was AUS$0.68c each. For a high grade, 105oC part, the cost was $7.19
each. (Same values) Naturally, there is a range of prices between these
values.

In my searching, the range of prices was US$0.68 for the 85 degree part
versus US $0.35 for the 105 degree part. Yes, the higher temperature
product was cheaper!

**That is certainly possible. However, I was VERY specific in my search. I
wanted MIL-Spec or similar quality. That means at least 20,000 hours and low
ESR, along with the usual specs associated with high grade parts.

Trevor Wilson