electrolytic for AC really bad?

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#21
Willi Studer said:
Yes, leads are indeed uneven like on polarized caps. But I find no theoretical explanation for your claim, as both electrodes are chemically treated the same, nor do I find any manufacturer's instruction to support it. But if this is true, then I hate you because I have at least 30 of ES' in my system, arbitrarily turned and soldered in all orientations.
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I said look inside. Cut open an electrolytic capacitor. What you think about my information relay is irrelevant, it's obvious to human ears. I feel no responsibility to explain to you potentials in difference for something you can try for $1 in as isolated situation.

I'm sure your system has some balance since they go both ways. I can't report one polarity is better like with Blackgates. However I can say the balance of treble to bass is incorrect without doing what I mentioned and drew a picture of.... That's the number one assertion in reviews of the ES cap in signal, and why people go with high end film over them when possible.

I've done some annoying resolder work with Blackgates. The reward was worth it.
 
#22
ringing said:
There are my DC voltage measurement on the four supposedly polar caps. The output caps are nichicon polar electrolytic caps. It has black case with gray stripe on the - side.

Input left: -5.7mV
Input right: -5.4mV

Output left: +1.9mV
Output right: +1.4mV

The input caps are polar on the schematic, but on the actual product they do not look like polar caps. They have blue rectangular case and 47nJ63 is written on the case.
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Those voltages are minimal but its still worth polarising any replacements correctly (and always measure across the cap to get the most reliable reading).

To make a bipolar cap you connect to identical caps in series, either plus to plus or minus to minus, it doesn't matter. If you have a 10uf cap then you need two 22uf's to make a bipolar one, two 68uf's to make a 33uf and so on by using the nearest values.
 
#23
Destroyer OS. said:
I said look inside. Cut open an electrolytic capacitor. What you think about my information relay is irrelevant, it's obvious to human ears. I feel no responsibility to explain to you potentials in difference for something you can try for $1 in as isolated situation.

I'm sure your system has some balance since they go both ways. I can't report one polarity is better like with Blackgates. However I can say the balance of treble to bass is incorrect without doing what I mentioned and drew a picture of.... That's the number one assertion in reviews of the ES cap in signal, and why people go with high end film over them when possible.

I've done some annoying resolder work with Blackgates. The reward was worth it.
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Sorry for any eventual misunderstanding, I did not discard your claims as irrelevant, I only said they just were not technically not obvious to me, but I do believe empirical tests do show a difference.
 
#25
The DC voltage across the output polarized cap is + 1 ~ 2 mV, but the audio signal may make the polarized cap inversely polarized for short time - but many times -. The smaller the load impedance, the more the inverse voltage. The invese voltage is not likely go beyond - 1V peak, however.

Did the designer want distortion of polarized cap to make the sound "sweet" (even harmonics)?
 
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#29
Mooly said:
It could well be a bad idea, yes.

Have you considered how it would affect switch on and switch off behaviour ?
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No, I haven't... Thanks Mooly. Then for a 1k resistor a 470uF or even a 220uF would be a more sensible choice? 470 ms or 220 ms, should see no AC across, I hope... NFB capacitor blurs the sound a little and bypassing with 22nF MKP1837 gives me sibilance... 🙁 I guess the best cap is no cap.
 
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