Elna Silmic II or Elna Cerafine? - Page 2 - diyAudio
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Old 15th August 2010, 11:37 PM   #11
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Quote:
Originally Posted by indianajo View Post
Silk has not been used as a capacitor dielectric since the 1920's, you should look at the datasheet to find out what it really is.
Not pure silk but it's certainly part of the mix.

Aluminum electrolytic capacitors for audio applications - Features of the SILMIC series | ELNA

I prefer Silmic IIs over Cerafines.
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Old 16th August 2010, 12:22 AM   #12
mach1 is offline mach1  Australia
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rg12,

I would advise you to get a handle on the sonic signature of various electrolytics before you embark on replacing all those in your amp with just one type. Each type has a different signature which may or may not be to your liking, and if you stick with just one, you are going to hear that signature big-time. Mixing them up a bit may get you the best outcome.

As well as Silmics, I would suggest you consider Panasonic FC, FM and Nichicon KZ. Re the 0.22uF caps (which sound like coupling caps) I would simply replace them with MKP416 (a high quality polyprop film type from Digikey).

Whatever you choose, follow Indianajoe's advice and get the caps fresh from a large supplier.
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Old 16th August 2010, 01:17 AM   #13
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By mixing them up you mean just throw randomly some from one series
and some from another?

The 0.22uf cap is electrolytic, is it ok to replace it with metalized polypropylene?

Whats wrong with hearing the signature of the caps? i thought that
this is the purpose.
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Old 16th August 2010, 02:27 AM   #14
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Dude, don't worry about putting in different brands/series of caps. As long as they are better than you took out you will be OK.
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Old 16th August 2010, 02:38 AM   #15
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Quote:
Originally Posted by KevinLee View Post
Dude, don't worry about putting in different brands/series of caps. As long as they are better than you took out you will be OK.
Yeah i know that, but i feel weird about just throwing some of this and some
of that without thinking what will sound how and where...
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Old 16th August 2010, 02:51 AM   #16
mach1 is offline mach1  Australia
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Quote:
By mixing them up you mean just throw randomly some from one series
and some from another?
No I mean getting a handle on the sonic signature of various caps and arriving at a mix (or monoculture) that satisfies your sonic preferences. Mine is to try to achieve a level of neutrality with no predominant signature.

Quote:
The 0.22uf cap is electrolytic, is it ok to replace it with metalized polypropylene?
Absolutely, so long as its voltage rating is not exceeded.

Quote:
Whats wrong with hearing the signature of the caps? i thought that
this is the purpose.
It may well be your purpose. Mine is to try and diminish the sonic contribution of caps.
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Old 16th August 2010, 02:54 AM   #17
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Quote:
Originally Posted by rg12 View Post
Yeah i know that, but i feel weird about just throwing some of this and some
of that without thinking what will sound how and where...
Unfortunately the reality is, that unless you have Two amps and make changes to one cap at a time, and can do proper A/B comparisons, you really never will know which cap made what difference if any. Even that is flawed, as it may be an interaction between multiple components that will have an effect.

When I did my amp, I did feel it sounded different and better, but I have no way of knowing whether it really did, or if it was a purely pshyco acoustic effect or even just inability to correctly remember how it previously sounded.

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Old 16th August 2010, 02:57 AM   #18
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About the mixing thing...i don't understand how can i test and achieve that.
To hear a cap i need to solder it, so how exactly is it done?
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Old 16th August 2010, 03:35 AM   #19
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Now im stuck...because using the same series for the whole amp isn't
recommended and even if i choose lets say two or three different brands or
series for the amp, i wouldn't know how to split them.

Here's the schematic for the amp and a pic of the top of the amp:
http://www.milkbands.co.il/Pioneer-SA-7300-int-sch.pdf
http://www.milkbands.co.il/P8080006.JPG
If someone maybe can take a look and tell me how to devide the sections
so i wont just throw one cap here and another brand there and make the
channels uneven or something.

Thanks alot so far.
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Old 19th August 2010, 12:13 AM   #20
Pocoyo is offline Pocoyo  Indonesia
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silmic used near transistor better than cerafine
(100uf)

for supply (DC) 470uf or 330uf cerafine better
if used silmic you will feel bass influence a little bit
(looks for the caps after transformer)

if you have more budget go to bg std, f, fk or n

hope u success
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