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BOB Urz BOB Urz is offline
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Default Audiophile cappacitor replacement



Arfa Daily wrote:

"Bob Urz" wrote in message
...


Arfa Daily wrote:

What's a genuine expert ?


Dictionary opinion :-
ex·pert /n., v. '?ksp?rt; adj. '?ksp?rt, ?k'sp?rt/ Pronunciation
Key -
Show Spelled Pronunciation[n., v. ek-spurt; adj. ek-spurt, ik-spurt]
Pronunciation Key - Show IPA Pronunciation
-noun 1. a person who has special skill or knowledge in some particular
field; specialist; authority: a language expert.


My opinion :-
Someone who has successfully made a subject his life's work, and whose
pronouncements are accepted as valued by more people who have an
understanding of a subject, than rejected - hence my qualification of
"genuine" rather than the unsubstantiated opinions that are put forward
by
someone who only *claims* themselves to be an expert.


that an improvement in the dynamic
response and overall flatness of the response curve of a high end - and
we're talking 1200 quid monoblocks here - *is* both audible and
measurable.

And I were to tell you that they are complete knobs ?



Then I would have to tell you that that is a very jaded view, just your
opinion, and not really sustainable. And to be honest, not the sort of
input
that I've come to expect from you, whose views I normally respect.


I know what you're saying - or implying at least - and under normal
circumstances, having been in this business for 35 years and having seen
and
looked into virtually every snake oil claim that there is out there, I
too
would be skeptical. However, knowing the credentials of the people who
have
made these claims, I have no reason to doubt them. I don't know whether
you
have ever been over on uk rec audio, but there are some furious debates
that
get going over claims about audible differences on cables,

Yes, they're quite barking mad and one of the guys who makes some of the
most
extravagant claims has utter rubbish for his 'system'.



*Some* are quite barking, I would agree, but that does no preclude the
fact
that there are one or two on there who are respected figures in the
field,
and whose opinions I would consider to have more value than my 'broader
understanding' ones, which are based on many years of repairing the
stuff,
rather than designing, modifying and speccing it ...



and it always
comes down to measurable characteristics in the end, so that is why I am
prepared to accept what has been said with regard to these caps, in this
situation, by these people.

I genuinely believe that measurements with the appropriate equipment
*have*
been made, and a difference *has* been seen.

By whom ?


Errr ... By the people doing the measuring ??



At the end of the day, Jensen
are a reputable company, and have been around for a very long time
selling
very high quality caps. Whilst I appreciate that this is not a
recommendation for any claims per se, by the same token, in my
experience,
snake oil sellers tend not to last too long, before their claims are
discredited ...

Not in the audio business !



Yes, in *all* businesses.


Be assured that unless I was pretty confident of what I was saying, I
wouldn't actually say it on here, and potentially mislead someone that
may
be of lesser ability or experience than me. However, all of this has no
relevance to the OP's original question, which I answered with what I
believe to be an honest opinion, which is that attempting to replace
electrolytic interstage coupling caps, with bipolars, will not result in
any
audible improvement to his equipment.


Biploars will make it worse actually.


So I have to ask, and this is a genuine question, as you clearly believe
that you, unlike the people on uk rec audio, are an expert, in what way
will
they make it worse, and why ? And if it is demonstrably the case, why do
the
likes of Musical Fidelity use them as interstage couplers as a matter of
course in their high end preamps, and why do they get used as the C
element
in better quality crossovers ?


Have you ever measured any capacitors?

I have.

Graham


Of course I have measured capacitors, but for the characteristics that
are
important for repair purposes, not esoteric values that have an impact on
design of the surrounding circuitry.



What the Hell is a "esoteric value"? How does one measure "esoteric
values"? Is there a "esoteric value" meter?


Oh dear ! Clearly, English is your native language, but it would seem that
there are some words that you just haven't come across ... Do they not have
dictionaries wherever you are ? I actually agree with most of what you have
said, and I never implied that I believed in golden ears, or anything else
in the same vein. All I said, that seems to have created the rather
vitriolic response from Graham, was that I genuinely believed that there
were measurable differences in the performance of "audio grade" caps over
bog standard types, and that there were people out there who had made those
tests. The reference to "esoteric values" is a tongue in cheek allusion to
the 'snake oil experts' who will present complex-sounding measurements that
are actually ********. For your further education ...

es·o·ter·ic /??s?'t?r?k/ Pronunciation Key - Show Spelled
Pronunciation[es-uh-ter-ik] Pronunciation Key - Show IPA Pronunciation
-adjective 1. understood by or meant for only the select few who have
special knowledge or interest; recondite: poetry full of esoteric allusions.
2. belonging to the select few.
3. private; secret; confidential.
4. (of a philosophical doctrine or the like) intended to be revealed
only to the initiates of a group: the esoteric doctrines of Pythagoras.

--------------------------------------------------------------------------------

[Origin: 1645-55; Gk esoterikós inner, equiv. to ester(os) inner
+ -ikos -ic]

-Related forms
es·o·ter·i·cal·ly, adverb

-Synonyms 1. abstruse, arcane, cryptic, enigmatic.
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc.
2006.
American Heritage Dictionary - Cite This Source es·o·ter·ic (es'?-ter'ik)
Pronunciation Key
adj.
1..
1.. Intended for or understood by only a particular group: an
esoteric cult. See Synonyms at mysterious.
2.. Of or relating to that which is known by a restricted number
of people.
3.. Confined to a small group: esoteric interests.
4.. Not publicly disclosed; confidential.
2..
1.. Confined to a small group: esoteric interests.
2.. Not publicly disclosed; confidential.

[Greek esoterikos, from esotero, comparative of eso, within; see en in
Indo-European roots.]

es'o·ter'i·cal·ly adv.

(Download Now or Buy the Book) The American Heritage® Dictionary of the
English Language, Fourth Edition
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
WordNet - Cite This Source esoteric

adjective
confined to and understandable by only an enlightened inner circle; "a
compilation of esoteric philosophical theories" [ant: exoteric]

Arfa d;~}


Ok, you have a dictionary definition of esoteric. You have so called experts telling
you what esoteric is. What are there qualifications?
I don't recall seeing any engineering school classes on esoteric.
What makes these guys so much smarter than everyone else?
And why is so much of the stuff Voodoo science it seems?
And VERY costly to boot?

Like i said before, test caps with a standard, quantifiable test of
some sort. and put the charts with it to show in black and what
what the differences are. And under what conditions, loads and voltage ratings.
Anybody can tell or sell you anything. that does
not make it true or better. There are still people selling magnets
that go on automotive fuel lines that claim give you
better mileage. After all these years! PT Barnum was right.

I am not against better quality components of any nature.
But i want to see the proof. Being in the service industry for
years, i am all for the best bang for the buck. These days its
a matter of survival in the service industry. In the quest for
that, i have been on both the good and bad end of component
sourcing. Sometimes you just need to find out for yourself.

Bob


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