cap comparisons, oil leakage?

62.2.246.194

Posted by Arbelos on November 29, 2000 at 14:23:31

In Reply to: more on jensen as speaker caps posted by paco on November 28, 2000 at 09:53:01:

Concerning the Auricap (website) comparisons:

They shure do look impressive. The main points are: Extremely low losses with very low variability, besides less dissipation.

However there are other issues in cap sound, that don't show up in these measurements, specifically microfony, which may be a real source of problems (too). The charge transfer is linked to vibrational (static) forces, these vibrations might leave a sonic trace on the signal. That trace, however small it might be, could be subjectively more nocuous than a constant resistive loss. It seems to me, that the oil could damp vibrations within the layers, helped by the acoustically absorptive nature of the paper impregnation (however bad the dielectrical properties of paper are compared to the better plastics). Increased microfony will show up as losses too, but i'm not shure how well the loss factors really correlate with microfony (and the real sonics of caps).

There is another issue that was raised in a discussion with a manufacturer. His information sources in the business sayed, that paper in oil caps 'go off', supposedly by loosing (vaporizing) the oil. Does anybody know about that? How long do they guarantee the values? Maybe its a problem of some manufacturers and not others.
I think if this would happen, that the problems would be so big that then i even wan't have to express excuses for using 18 dB crossovers, because the s.-load is big enough even with 6 dB-crossovers.

Any information would be appreciated and important IMO.

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Follow Ups Full Thread

Topic - more on jensen as speaker caps - paco 09:53:01 11/28/00 (26)

Re: more on jensen as speaker caps - MikeSalamone 20:15:56 12/01/00 (5)

Re: more on jensen as speaker caps - paco 02:22:50 12/02/00 (4)

Re: more on jensen as speaker caps - MikeCh 11:23:10 12/02/00 (3)

foil inductors - paco 14:08:33 12/02/00 (2)

Re: foil inductors - MikeCh 17:09:39 12/02/00 (1)

sorry, i clearly said to have nothing else to add at this time :) (nt) - paco 00:11:31 12/03/00 (0)

As long as we're soliciting quotes, here are a few... - MikeCh 09:41:27 12/01/00 (0)

What's about Hovland? - vuman 07:32:49 11/30/00 (7)

Re: What's about Hovland? - paco 09:55:22 11/30/00 (1)

Re: What's about Hovland? Thanks for your advices (NT) - vuman 13:24:32 11/30/00 (0)

Hovland can't be evaluated due to "time smear" distortion - MikeCh 08:38:17 11/30/00 (3)

please... - paco 09:40:47 11/30/00 (2)

Sorry! - MikeCh 10:28:51 11/30/00 (1)

thanks! - paco 12:16:01 11/30/00 (0)

cap comparisons, oil leakage? - Arbelos 14:23:31 11/29/00 (0)

message from Gizmo (thanks for sharing, Gizmo!) - paco 22:45:22 11/28/00 (4)

Does that mean Jensen's sound like oil? : ) <nt> - Aaron B. 08:36:05 11/29/00 (3)

Or does it mean that... - MikeCh 09:19:39 11/29/00 (2)

not all oil is snake oil... - Arbelos 13:58:29 11/29/00 (1)

Re: not all oil is snake oil... - MikeCh 08:46:27 11/30/00 (0)

What's your point? - MikeCh 10:24:35 11/28/00 (6)

my point... - paco 00:09:39 11/30/00 (0)

Re: Jensens - Carlos 07:15:36 11/29/00 (4)

Re: Jensens - MikeCh 09:01:52 11/29/00 (2)

please calm down... - paco 11:00:26 11/29/00 (1)

I'm already as calm as a clam ;-) - MikeCh 10:44:23 11/30/00 (0)

Follow Ups

cap comparisons, oil leakage? - Arbelos 14:23:31 11/29/00 (0)

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