Removing Plastic covers from Capacitors - Page 24 - diyAudio
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Old 19th January 2003, 11:46 PM   #231
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"I wonder how it effects the sound. One could try pvc, and other metals for the capacitor, with rigorous effort."

I read somewhere recently that only aluminium can be used for the can.
I suppose other metals could be used if the can were insulated perfectly.

Eric.
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Old 20th January 2003, 12:54 AM   #232
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Old 20th January 2003, 02:29 AM   #233
jcarr is offline jcarr  United States
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Back in the early 1980s, Nippon Chemicon (IIRC) had some plastic-case electrolytics that sounded quite nice - at least by the standards of the day. NEC (IIRC) also had some glass-encapsulated tantalum capacitors that were considerably better-sounding than other tantalum caps. These were, however, removed from the marketplace due to accelerated leakage and other durability issues.

Also, I feel that the reasons why non-conductive case capacitors sound good and the reasons why removing the plastic covers from aluminum-can electrolytics sound good are completely different.

Regards, jonathan carr
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Old 20th January 2003, 10:57 AM   #234
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Quote:
Originally posted by jcarr
Back in the early 1980s, Nippon Chemicon (IIRC) had some plastic-case electrolytics that sounded quite nice - at least by the standards of the day. NEC (IIRC) also had some glass-encapsulated tantalum capacitors that were considerably better-sounding than other tantalum caps. These were, however, removed from the marketplace due to accelerated leakage and other durability issues.

Also, I feel that the reasons why non-conductive case capacitors sound good and the reasons why removing the plastic covers from aluminum-can electrolytics sound good are completely different.

Regards, jonathan carr
Jonathon, thanks for reminding me of plastic encapsulated electrolytics - I had forgotten all about them, and at the time I did not critique them sonically.
Never heard of glass encapsulation tantalums - I expect that they would sound unusually good - pity about the reliability issues - maybe this is solvable nowadays.
I agree that capacitor cans material and plastic labels are different issues.
I think that the reason for no non-aluminium cans is to do with reactions with the electrolyte, and non reactive material (plastic, glass ok, wood ?) are ok in this respect.
I find interactive field effects by proximity of materials affecting sonics.
In the case of the plastic shrink wrapping of electrolytics, I reckon from 10 years ago 'caps skinning' experience, that the sonic changes are due to removal of firstly the tension of the plastic, and when the plastic is removed, another sonic change.
Cutting the plastic sleeve removes tension and alters microphonics, and removal of the plastic sleeve gives another sonics change ime.

Eric.
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