Cornell Dubilier, (CDE) MLP and MLS series Flatpack, Ultra long life Aluminum Capacitors.
Example:
100VDC, 2700uf. MLP series 85 deg C rated series. 18 guage wire leads. Can obviously be inserted into boards. Or on the bottom of a tube chassis, for all or local buffering, right at the emitter, whatever.
0.046ohms at 20hz, 0.033 ohms at 20khz, both at 25 deg C.
Ripple at 120hz, 7.4A! At 20khz, 8.7A!
Double those numbers with a heatsink attached, which imples the capacity to ..mechanically damp them as well!
50 year lifespan at 45 deg C.
Good to more than 80,000ft altitude.
Price? Don't ask. In canadian $....$100.00 each. For reference, I expect about $85-87US each--at this time.
Digikey catalouge has them. (MLP series)
Cornell Dubilier pdf file on MLP and MLS Flatpack capacitors. 850kb size
If I wanted them, I'd shop around, due to pricing structure. After a bit of testing, this might beg a group buy.
The stainless case presents a problem, though. This is not good for sonics. Aluminum is no better, but it's a definite question.
Example:
100VDC, 2700uf. MLP series 85 deg C rated series. 18 guage wire leads. Can obviously be inserted into boards. Or on the bottom of a tube chassis, for all or local buffering, right at the emitter, whatever.
0.046ohms at 20hz, 0.033 ohms at 20khz, both at 25 deg C.
Ripple at 120hz, 7.4A! At 20khz, 8.7A!
Double those numbers with a heatsink attached, which imples the capacity to ..mechanically damp them as well!
50 year lifespan at 45 deg C.
Good to more than 80,000ft altitude.
Price? Don't ask. In canadian $....$100.00 each. For reference, I expect about $85-87US each--at this time.
Digikey catalouge has them. (MLP series)
Cornell Dubilier pdf file on MLP and MLS Flatpack capacitors. 850kb size
If I wanted them, I'd shop around, due to pricing structure. After a bit of testing, this might beg a group buy.
The stainless case presents a problem, though. This is not good for sonics. Aluminum is no better, but it's a definite question.
Ok. So maybe the price is not appealing.
But there are some among us whom would gladly pay fo the potential improvment, to do the experiment to see if it is worth it.
For example, some guy buys his pile of different cables and isolation devices, each working on the area that the human haring mechanism istself works at..which is we realize - music and sound via the leading positive edge of the transients and harmonics. We essentially, for the most part, use only 10% of the audio signal to figure out what we are hearing, and understanding.
So, for the human brain and ear, 100% of the signal..is contained within the measurement of 10% of the signal we measure in our equipment. This point sheds new light into the process of making better gear, for the majority of folks on this board, but not for the old hands in audio, specifically 'high end' audio.
These are the guys who make equipment as best they can, with the understanding of what the ear hears, as the primary aspect of their design process and physical execution of the gear itself.
At that point, of the understanding of the ear and the high end gear, it becomes clear that isloation devices, weirdly constructed cables and bizzarely designed gear ..can all have an affect on what the ear hears, but almost ZERO effect within the improperly weighted measurements we so commonly use.
So, therefore, the use of this capacitor, in the very least the experimental aspect, to test it's veracity..WILL take place in the realm of high-end audio. And if the capacitor turns out to 'sound great!' It WILL end up being placed in high end gear, with the eventual cost increase to the consumer of the given high end component. And the buyer of the gear WILL GLADLY pay the sum of money for the percieved increase in fidelity.
This is, only, of course, if the capacitor does increase the fidelity to a great enough percieved amount to justify the cost increase in the given item.
For example, in a solid state amp, at 250WPC, The use of let's say..8 of them (two per power rail) .. would increase the cost of the amp..at the retail level by about $2400.00. Not chicken feed.
But..when advantages and subjective quality and fidelity increases are few and far between..it is likely that an entire group of well heeled discerning audiophiles would pay the increase..gladly.
They are not gullible audiophiles, no-siree-bob. Just aware of how that hearing system works..and understand the costs involved..and are capable of swinging the cash to have others do for them what they cannot do themselves.
These capacitors, it turns out, are not new items on the marketplace, but are apparently not well known. I'm simply bringing them to the notice of the DIY crowd.. and any audiophile designers who peek in on the board at times. The ones smart enough to see that good things, useful things, can come from just about anywhere. Hi, guys!
New possible toy! Grab a set and experiment? What'cha got to loose, but the lead - to the competition.....
I'm putting them on my short list of items to obtain and consider.
Also, if experimenting, consider this. They are a highly expensive item. Limited production. It is possible that one may strip one set down and remove the metal casing. Then do a sonic quality test. Then, if good, proceed to the aspect of having the manufacturer do a custom batch..without the metal case. (experimental set from Cornell at the least, who knows, they might like developing a extra market for such a costly item..adds to their portfolio, etc) At this cost level, it won't be too different than the existing numbers.
But there are some among us whom would gladly pay fo the potential improvment, to do the experiment to see if it is worth it.
For example, some guy buys his pile of different cables and isolation devices, each working on the area that the human haring mechanism istself works at..which is we realize - music and sound via the leading positive edge of the transients and harmonics. We essentially, for the most part, use only 10% of the audio signal to figure out what we are hearing, and understanding.
So, for the human brain and ear, 100% of the signal..is contained within the measurement of 10% of the signal we measure in our equipment. This point sheds new light into the process of making better gear, for the majority of folks on this board, but not for the old hands in audio, specifically 'high end' audio.
These are the guys who make equipment as best they can, with the understanding of what the ear hears, as the primary aspect of their design process and physical execution of the gear itself.
At that point, of the understanding of the ear and the high end gear, it becomes clear that isloation devices, weirdly constructed cables and bizzarely designed gear ..can all have an affect on what the ear hears, but almost ZERO effect within the improperly weighted measurements we so commonly use.
So, therefore, the use of this capacitor, in the very least the experimental aspect, to test it's veracity..WILL take place in the realm of high-end audio. And if the capacitor turns out to 'sound great!' It WILL end up being placed in high end gear, with the eventual cost increase to the consumer of the given high end component. And the buyer of the gear WILL GLADLY pay the sum of money for the percieved increase in fidelity.
This is, only, of course, if the capacitor does increase the fidelity to a great enough percieved amount to justify the cost increase in the given item.
For example, in a solid state amp, at 250WPC, The use of let's say..8 of them (two per power rail) .. would increase the cost of the amp..at the retail level by about $2400.00. Not chicken feed.
But..when advantages and subjective quality and fidelity increases are few and far between..it is likely that an entire group of well heeled discerning audiophiles would pay the increase..gladly.
They are not gullible audiophiles, no-siree-bob. Just aware of how that hearing system works..and understand the costs involved..and are capable of swinging the cash to have others do for them what they cannot do themselves.
These capacitors, it turns out, are not new items on the marketplace, but are apparently not well known. I'm simply bringing them to the notice of the DIY crowd.. and any audiophile designers who peek in on the board at times. The ones smart enough to see that good things, useful things, can come from just about anywhere. Hi, guys!
New possible toy! Grab a set and experiment? What'cha got to loose, but the lead - to the competition.....I'm putting them on my short list of items to obtain and consider.
Also, if experimenting, consider this. They are a highly expensive item. Limited production. It is possible that one may strip one set down and remove the metal casing. Then do a sonic quality test. Then, if good, proceed to the aspect of having the manufacturer do a custom batch..without the metal case. (experimental set from Cornell at the least, who knows, they might like developing a extra market for such a costly item..adds to their portfolio, etc) At this cost level, it won't be too different than the existing numbers.
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