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Old 25th October 2005, 03:58 AM   #1
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Default "Audio grade" electros ?

NOT going into a debate about "muse/finegold/etc" being better sonically.

Just want to know why there sposed to be better.

Are they low esr, low leakage or what other properties they exibit.
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Old 25th October 2005, 05:02 AM   #2
jcx is offline jcx  United States
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Default did you see the little button?

search: capacitor dielectric
in electronic and parts forum:

http://www.diyaudio.com/forums/searc...der=descending
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Old 25th October 2005, 05:22 AM   #3
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Let me think for a moment,
why yes i did.

they dont really answer my Q.
WHY are they 'sposed' to be better.
and
Are they low esr, low leakage etc ?.
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Old 25th October 2005, 01:27 PM   #4
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on the question of are they low esr, I just did a test and they appear to be.

tested

1. Nichicon FG 10uF 50 V 1.2 Ohms
2. generic 10uF 50V 1.4 ohms
3. rubycon ZA 10uF 50V .7 Ohms

note I did this test once before but had a panasonic FC instead of the Nichicon. it was 10uF 50V and measured about 3 Ohms.

so I'd say since panasonic FC's are low esr and rubycon ZA's are ultra low impedance, the FG (muse) is not to shabby in that respect....

from the datasheets the FG and ZA have the same leakage, and the ZA has the edge in DF, but the FG's come in higher voltage versions than the ZA, and their DF gets better as the voltage exceeds the highest rated ZA.

whether or not this means anything

I used speaker workshop to measure.... the FG was 9.9uF the ZA 9.3 and the generic 8.6..... but on a sample of one all this could be complete BS

ok to add a little more credibility I tested the other two nichicon FG's I had, both 9.9uF both 1.1 Ohms, so one thing that seems to be the case from my small sample is that the tolerance is really tight. I only have one rubycon ZA......

Tony.
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Old 28th October 2005, 03:27 AM   #5
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Thanks, I couldnt find any real data sheets on the various "audio" grade caps.
This twadle about 99.9% pure copper etc, from memory thats what std copper stock is anyway.

Just sad that if they are better, why dont they bring them out in 105c vs the current 85c.
makes me more inclined to use low imp 105c.
Cheaper and easier to get.
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Old 28th October 2005, 12:21 PM   #6
Vidalgo is offline Vidalgo  Israel
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Quote:
Originally posted by ocaukrell
Thanks, I couldnt find any real data sheets on the various "audio" grade caps.
All datasheets are published, from all brands (except Jellmax and, probably, some very old discontinued series ).
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Old 28th October 2005, 12:42 PM   #7
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true but some have more info than others. The nichicon FG series for example has no info on ESR, no graphs, just basic info, like ripple current capability, DF, and reliabiliy data. I thought it was a bit light on

It can be pretty hard (if not impossible) to find datasheets for a lot of asian capacitors, which are what are generally available here in Aus from the mainstream electronics shops.

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Old 28th October 2005, 12:55 PM   #8
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phillips is excellent

panasonic is good too

'audio' grade , good quality caps can b said audio.caps differ in const. method,quality of material,filling,sealing etc etc.so better r these parmeters,better they will b close to ideal.

so a v.good cap(low leakage,temp. tollerant,little deviation from stated value,constant parameters even after prolonged use) can be called an 'audio' cap.
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Old 13th December 2013, 01:40 AM   #9
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Quote:
Originally Posted by sagarverma View Post
phillips is excellent

panasonic is good too

'audio' grade , good quality caps can b said audio.caps differ in const. method,quality of material,filling,sealing etc etc.so better r these parmeters,better they will b close to ideal.

so a v.good cap(low leakage,temp. tollerant,little deviation from stated value,constant parameters even after prolonged use) can be called an 'audio' cap.
During the 70's and 80's the buzz word was computer grade electrolytic capacitors from big name manufacturers.
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Old 13th December 2013, 11:37 AM   #10
fpitas is offline fpitas  United States
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I've noticed that various audio grade electrolytics have some damping material in them (silk, hemp, etc). Perhaps the intention is to lower microphonic effects, either from external sources or internal resonance.
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