I found some information on the WEB about piezoelektrik effects of Teflon but no exact values or tables, etc., but maybe you or someone else was more lucky ?
As an aside, the effect that Wavebourn mentions is not a piezoelectric effect to the best of my knowledge. Simply if you have a cap with a given charge and change the distance between the plates this changes the voltage according to the standard formulas for capacitance.
Any truth in this or just marketing?
Unlike most other amp builders we take the higher longer road in construction and ensure the caps
outer foils are properly oriented throughout the amp.
In Leo's days the cap companies clearly marked the end attached to the outer foil making
placement a snap. If you look inside an old Fender you can see the caps are marked with a line
denoting the outer foil.
Nowadays each cap must be tested on an oscilloscope to determine which end has the outer
foil! Then the amp builder must know how to orient the cap properly in the various places
of the circuit.
Do it right and you have an amp that is properly voiced with less noise and better tone.
Do it any other way and the amps tone will suffer.
Unlike most other amp builders we take the higher longer road in construction and ensure the caps
outer foils are properly oriented throughout the amp.
In Leo's days the cap companies clearly marked the end attached to the outer foil making
placement a snap. If you look inside an old Fender you can see the caps are marked with a line
denoting the outer foil.
Nowadays each cap must be tested on an oscilloscope to determine which end has the outer
foil! Then the amp builder must know how to orient the cap properly in the various places
of the circuit.
Do it right and you have an amp that is properly voiced with less noise and better tone.
Do it any other way and the amps tone will suffer.
outer foil orientation
What's the proper way in AC-coupling a driver to a powertube? Outer foil holds the high potential?
That much difference?
What's the proper way in AC-coupling a driver to a powertube? Outer foil holds the high potential?
Dell company blames on Nichicon...
http://www.nytimes.com/2010/06/29/technology/29dell.html?_r=2&src=me&ref=homepage
http://www.nytimes.com/2010/06/29/technology/29dell.html?_r=2&src=me&ref=homepage
So industry wide, cheap Chinese capacitors were failing, and Dell was responsible?
"They are not meant to pop and leak fluid, but that is exactly what was happening earlier this decade, causing computers made by Dell, Hewlett-Packard, Apple and others to break. "
Don't you just love Spin.
"They are not meant to pop and leak fluid, but that is exactly what was happening earlier this decade, causing computers made by Dell, Hewlett-Packard, Apple and others to break. "
Don't you just love Spin.
What is strange, all of them started leaking at once... Was the fault programmed, to clean the market for new chemistry produced by the plant, after expiration of warranty?
This exactly happened in my Samsung monitor: the next month after the end of warranty time capacitors in a voltage converted failed, and it shut down itself 1-2 seconds after switching backlight on, due to too high ripples. A battery in Nissan Sentra I bought in December 2000 failed exactly the next month after battery warranty expiration. Both headphone and power sockets in Dell Inspiron 9300 notebook lost contacts just after the end of warranty, so I had to invent a curved soldering tip to repair them... Hard drive at my wife's work died the next month after warranty expiration...
Too many coincidences, don't you think?
This exactly happened in my Samsung monitor: the next month after the end of warranty time capacitors in a voltage converted failed, and it shut down itself 1-2 seconds after switching backlight on, due to too high ripples. A battery in Nissan Sentra I bought in December 2000 failed exactly the next month after battery warranty expiration. Both headphone and power sockets in Dell Inspiron 9300 notebook lost contacts just after the end of warranty, so I had to invent a curved soldering tip to repair them... Hard drive at my wife's work died the next month after warranty expiration...
Too many coincidences, don't you think?
Hi,
Indeed.
Nothing new either. A knowledgable engineer can design and/or predict when something will fail.
This is how the bucks are made and how companies survive.
Make something near perfect and you'll have to charge big time if not you could juist as well shut your doors right now.
Cheers, 😉
Indeed.
Nothing new either. A knowledgable engineer can design and/or predict when something will fail.
This is how the bucks are made and how companies survive.
Make something near perfect and you'll have to charge big time if not you could juist as well shut your doors right now.
Cheers, 😉
A duck has a bill, feet, feathers, wings, eyes etc. So do lots of other animals but they don't quack like a duck. When I use expensive caps (for me) e.g. Jensen copper, paper and oil and other good components e.g. pure silver wire as hook-up wire, the whole amp/preamp sounds a lot better.
Caps are not just caps. They all have a sonic signature, you may like it you may not. Strangely a good transformer does far less sonic harm than a good cap. Call the riot police on that one!
Hi,
Illuminated response.
Interestingly though not much would show up in measurements.
Science, where are thou?
Cheers, 😉
Illuminated response.
Interestingly though not much would show up in measurements.
Science, where are thou?
Cheers, 😉
Take a look at the chemical analysis of a good red wine, then taste it. Did the analysis acurately predict how the wine would taste?
We only measure what we can. Subjectivity is the final measurement and to us (individually), the most acurate.
We only measure what we can. Subjectivity is the final measurement and to us (individually), the most acurate.
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Covered in another thread. The failure was a result of mainland manufacturers all jumping on the the same stolen, and wrong, electrolyte formula. The response though was all Dell.
Surprisingly, to a great extent, it can. Much of the research to bring us to that point came from Australia, in fact. If you handed me (for example) a Maranges, a chemical analysis would be able to tell me that it's Pinot Noir, the general climate in which it's grown, what the winery treatments were, and the overall flavor balance.
Sorry to go OT.
Would your taste buds and mine report the exact same taste? Bitter, sweet, dry, fruity, acidity, tannin level, chocolate, spice, cinnamon?
And what if you like it and I don't? Did the analysis tell me that or do I need to work that out for myself. Then did the analysis fail?
With caps some crude measurements that can be done and we HAVE TO know are: Capacity, voltage rating, max temp of operation, polarity of connections. Some things I like to know are: dialectric, foil material, other materials use in manufacture, possible break-in period, connector metal and cost.
I loved the original Jupiter hand made beeswax caps. But the dopey manufacturer stopped making them. How caps sound only I can answer, because it is subjective.
I think the funniest measurents I see often is distortion level with amps (pre or power). Oddly tube amps often (subjectively) have the best sound and the worst distortion figures. Some of the best sounding SS stuff has very high distortion figures and costs many 10s of 1000s! Yet receive the very best reviews. Wonder what caps they use and what wine the makers and rich purchases drink? Do they run ducks? We should ask them!
If all these other capacitor characteristics had such a dramatic effect as some people try to make you believe then I'm sure they already would have been well-documented, would appear in the respected datasheets, not to mention, would have been discussed to death already, as they would most definitely matter a lot more on the other fields of electronics that require far more precision than what audio does.
No,the stolen formula issue was another issue in 2001/2002. It were chinese companies that bought a stolen ( AFAIK form Rubycon ) formula for a low ESR electrolyte which was incorrectly noted down. As a result of that the electrolyte that was produced wrongly dried out and caused the caps to bulge/leak. These caps were produced by th emillions under various relatively ( by then ! ) names like Lelon, Jackcon, CapXon etc etc. Please see Badcaps.net - Badcaps Home for more brandnames.
Nichicon is an A brand and it had the problems after the "stole formula" caps were produced. It is sad that this happened to a manufacturer of known good parts but I guess it is fate.
A Dell engineer told me that the electrolyte that Nichicon used was contaminated with a substance that should not be there.
Those are brain functions, not taste bud functions. Any two skilled tasters will indeed be able to report very similar sensations. And do so under double blind conditions, unlike capacitor enthusiasts.
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