audio capacitors 1800/150 uF ?

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I remember once being sold a pension policy. One of the sales features was the 'open market' option, which meant that on maturity I could take the accumulated pot of money and use it to buy an annuity from another insurance company if they were offering a better deal than the one I had saved with. I later discovered that the 'open market' option was a statutory requirement, so every pension sold by everyone had to include it. This is how sales people mislead by telling the truth, but not the whole truth.

out of context
 
thedoc735 said:
out of context
Not at all. The context is people making claims for their product which are or should be true of all products of that type. If the new product is better at some application than existing products of the same type then you can be sure they would give facts and figures comparing their product with the other ones. If they do not, then it can be assumed that their product is no better than the others; indeed, it could be worse but not sufficiently bad to rule out that application.

To take a hypothetical example: someone invents a new cap technology which can cope better with high temperatures than older designs, but at the cost of increased ESR. They give chapter and verse on its temperature performance, compared with other caps. They also say that it can be used for reservoir, decoupling and coupling applications. This is true - yet for reservoir (and possibly decoupling too) it is inferior unless the high temperature feature is required. Some people will read the blurb and assume that the cap is as good as others or even better than others.

To get back to the original point of this thread, what is wrong with the caps you already have which makes you want to change them? If you knew that then you would know what characteristics you need to improve and so narrow down the list of candidates.
 
The one thing I never understand about these discussions is - what's the harm in him just trying it out if he so badly wants to?

People waste money on stuff they don't need on a regular basis, it's part of being a human in the 21st century. Technically we don't *need* audio gear at all - a large portion of this industry is purely for generating enjoyment and pleasure. I think it's fair to stop someone if they are wasting a huge sum (maybe relevant for a commercial application) but for most people, swapping a few caps in a single device is hardly going to impact their financial well-being.

I agree that caps make little difference in a well-designed circuit and if they do the circuit should ideally be changed - but the former may not be the case and the latter may not be an option. My take would be "it probably won't make much difference, but if you want to waste a few bucks and try it, go nuts".

:c_flag:
 
Not at all. The context is people making claims for their product which are or should be true of all products of that type. If the new product is better at some application than existing products of the same type then you can be sure they would give facts and figures comparing their product with the other ones. If they do not, then it can be assumed that their product is no better than the others; indeed, it could be worse but not sufficiently bad to rule out that application.

To take a hypothetical example: someone invents a new cap technology which can cope better with high temperatures than older designs, but at the cost of increased ESR. They give chapter and verse on its temperature performance, compared with other caps. They also say that it can be used for reservoir, decoupling and coupling applications. This is true - yet for reservoir (and possibly decoupling too) it is inferior unless the high temperature feature is required. Some people will read the blurb and assume that the cap is as good as others or even better than others.

To get back to the original point of this thread, what is wrong with the caps you already have which makes you want to change them? If you knew that then you would know what characteristics you need to improve and so narrow down the list of candidates.

good point

good point again!

I know the characteristics I would like to modify. I don't know who fitted the current caps or if they are the original values? I don't want to max out the specs. if they are already max'd out i.e. uF 20%.
 
The one thing I never understand about these discussions is - what's the harm in him just trying it out if he so badly wants to?

People waste money on stuff they don't need on a regular basis, it's part of being a human in the 21st century. Technically we don't *need* audio gear at all - a large portion of this industry is purely for generating enjoyment and pleasure. I think it's fair to stop someone if they are wasting a huge sum (maybe relevant for a commercial application) but for most people, swapping a few caps in a single device is hardly going to impact their financial well-being.

I agree that caps make little difference in a well-designed circuit and if they do the circuit should ideally be changed - but the former may not be the case and the latter may not be an option. My take would be "it probably won't make much difference, but if you want to waste a few bucks and try it, go nuts".


:c_flag:

:cheers:
 
A lot of members seem to bullsh*t the Silmic II, but have you seen this?

High End Audio - Electrolytic capacitors

"Elna Silmic II is the best device of this test. Comparing with very good Black Gate, Elna sounds better. There is as difference between Sprage and Black Gate than Black Gate and Elna. It is certainly the best choice on electrolytic capacitors for top end devices. Good sound for classical, baroc, jazz and modern music."
 
You go on and on about how much help I have received 'here', BUT ~ I see lots of confusion, chaos, & contradictory information as well as many posts that don't really have anything to do with the original question that I posed !! There is a 'smattering' of well directed responses. You talk of: coupling, decoupling, filter caps and measuring 24v rails etc. without educating me on these topics!! The lazy response being: "go buy a book"! I have found information with google search and 1 or 2 private messages from members, but not that much on this thread so far! I can provide pictures so that you can point out & illustrate your narrative in greater detail. Designing circuits is entirely different to replacing failed components which I can do with ease, but many concepts are beyond my current understanding (@ the age of approaching 60) and any real help is most definitely appreciated. BTW I am rubbish at algebra and physics! LOL.
 
A lot of members seem to bullsh*t the Silmic II, but have you seen this?

High End Audio - Electrolytic capacitors

"Elna Silmic II is the best device of this test. Comparing with very good Black Gate, Elna sounds better. There is as difference between Sprage and Black Gate than Black Gate and Elna. It is certainly the best choice on electrolytic capacitors for top end devices. Good sound for classical, baroc, jazz and modern music."
What duty?
Did they specify for Decoupling of the supply rails, or smoothing of the PSU rectified mains, or AC coupling of an interstage, or speaker capacitor for DC blocking, or filtering of low level signal, or filtering of a high level signal (with or without bias) and some others I have missed?

Without a duty the paragraph is completely useless !

But then that is typical of Hi End advertising and this "review" is intended for that gullible audience.
 
"Elna Silmic II is the best device of this test. Comparing with very good Black Gate, Elna sounds better. There is as difference between Sprage and Black Gate than Black Gate and Elna. It is certainly the best choice on electrolytic capacitors for top end devices. Good sound for classical, baroc, jazz and modern music."

Are you BS-ing us? You take this serious?

Jan
 
thedoc735 said:
You go on and on about how much help I have received 'here', BUT ~ I see lots of confusion, chaos, & contradictory information as well as many posts that don't really have anything to do with the original question that I posed !! There is a 'smattering' of well directed responses. You talk of: coupling, decoupling, filter caps and measuring 24v rails etc. without educating me on these topics!! The lazy response being: "go buy a book"!
Anyone asking about capacitors will get two kinds of answer:
1. the engineering answer (e.g. what is the cap doing, what is the correct value, what is the appropriate dielectric)
2. the audio fashion/preference answer (e.g. I tried Brand X in my totally different circuit and they were wonderful/rubbish etc.)
People offering the two different types of answer will disagree with each other, and those offering fashion answers will disagree among themselves.

We cannot turn every thread about capacitors into a detailed tutorial on basic electronics, so that is why the advice to do some reading may appear. If you lack any knowledge of physics then first you need to acquire this - but most elementary electronics books will start with this anyway. In the meantime you are probably not in a position to sift the wheat from the chaff in the advice you have been given, so the more advice you get the more confused you will become.

This is a discussion forum, not a teaching resource. Having said that, I have learnt a lot from other people on here but that involved me doing some thinking too and not simply looking for ready-made answers.
 
Well said.

I could add the two items are not a contradiction and round-trip between the two items is a comon way of doing things when it comes to a hobby (where the efficienty of Learning in a limeted time is not involved like school times or profesional curses for instance).

This round-trip is almost necessary as behind the engeeniring, the result is also an easthical subjective perception (although there are objectiv explanation to explain this) which itself is corralated to subjective setings in your audio chain reproduction : rooms, others electronic stuffs, quality of your DC walls, quality of the reccordings, yourself and your ears, etc, etc.

Here people are perfectly aware of this and like to argue with always overflatting subjectiv points, because this is human (me the first) and because also all are not involved the same way, with the same knowledges and experience. Said that, experience help a lot also. Discover process are not only rational, although testing is here to check a posteriori an hypothesis/theory.

The OP is waiting a perfect answer of what he think to be a perfect question.

Experienced guys try to show with patience this fact by a re formulation of the question or by self teaching via experiments which are highly guided (because they know because they try before).

It's not a philosophical curse, so the op needs round-trip to learn/understand and valid some points he had not the idea.

Said that, be aware than playing with tubes need also some prudence as the voltage can be lethal, electricity is not Lego, and even Lego can be lethal with Young children.

We have also here to still understand if the op is in the field of dialectic or if there is a wisch of tailoring his dac. In the last case, he has to understand the answers can not be as perfect than he wisch " what could be the best caps for the best sounding in MY PÄRTICULAR SETUP and it was said caps is only a little factor (althoug sometimes more than important) among others.

Sorry to rephrase and rephrase, it is of course written for the op as the diyers, even the simpliest enthusiasts like me are all aware of that again.

Now if it's only about dialectic we can play too, that's the beauty of the thing, people are gentle here and most of he time want to help you and share their hobby.... even if they disagree because (again) at the end, Nothing than you can subejectivly how taste the wine if you don't drink it !😎... and if you don't test the glass than we give to you, why continue to argue !
 
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