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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: No experience, but some obvious problems: posted by Al Sekela on December 18, 2006 at 11:25:48:
Vacuum capacitors, at least the one's I recall, should be excellent for audio, they certainly worked well at RF. Since the interdigitated plates are concentric cylinders and each one is connected at one end to a common plane, inductance is very low. And they certainly don't use vacuum pumps, even the variable ones use a bellow's system to seal out the air. The glass tends to be rather thick so I doubt it will ring. And naturally you can minimize noise pickup by connecting the outside plate to the lowest impedance. And they should have very low dielectric absorption as almost none of the field penetrates the glass.Since the vacuum is only used to increase their voltage rating, even if they have leaked they should be just fine for audio. The problem with the low values is that you have to use high-impedance circuitry, tubes would be good...
Rick
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- Only problems likely to be large size and low value... - rick_m 12:23:54 12/18/06 (0)
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