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Old 27th June 2004, 11:59 AM   #1
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Default AC coupling capacitors...

I am building a low pass phase-linear filter and was wondering about output AC coupling capacitors... What composition would you use, MKT, polystyrene, electrolytic, etc...

Thanks for the help.

I know some of you advocate no capacitors whatsoever in the signal path, but I do not.
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Old 28th June 2004, 02:36 AM   #2
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Old 28th June 2004, 09:08 PM   #3
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bump last time
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Old 28th June 2004, 09:11 PM   #4
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BG N or MKP
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Old 28th June 2004, 09:12 PM   #5
mirlo is offline mirlo  United States
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Without knowing more about your application, I'd suggest polypropylene, or if you cant afford the $$ or space, polyester or (high quality) electrolytic.
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Old 28th June 2004, 09:34 PM   #6
sss is offline sss  Israel
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poliyester will work fine
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Old 29th June 2004, 09:10 AM   #7
johnf is offline johnf  Germany
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Quote:
Originally posted by sss
poliyester will work fine
If one uses, say, a 1µF polyester to a 100K ohm load, is there is any need to parallel it with a 10nF polypropolene (or similar) as the Jung and Marsh Audio article seems to suggest? I still don't understand out how that would help. The DF would seem to be insignificant and the DA wouldn't be reduced. If I were to add one now, it would be with as much understanding as the member of a cargo cult. That's not a happy state of mind for a scientist!
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Old 29th June 2004, 11:22 AM   #8
johnf is offline johnf  Germany
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Sorry, make that "polypropylene". It appears it isn't possible to edit a post on this forum, but I will try a couple other browsers.
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Old 30th June 2004, 06:28 AM   #9
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Quote:
Originally posted by johnf
Sorry, make that "polypropylene". It appears it isn't possible to edit a post on this forum, but I will try a couple other browsers.
You can edit your post within 30 minutes.
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