AC coupling capacitors...

Frazzled · 27th June 2004, 11:59 AM

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.

Frazzled · 28th June 2004, 02:36 AM

bump

Frazzled · 28th June 2004, 09:08 PM

bump last time

Wes Marquenie · 28th June 2004, 09:11 PM

BG N or MKP

mirlo · 28th June 2004, 09:12 PM

Without knowing more about your application, I'd suggest polypropylene, or if you cant afford the $$ or space, polyester or (high quality) electrolytic.

sss · 28th June 2004, 09:34 PM

poliyester will work fine

johnf · 29th June 2004, 09:10 AM

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!

johnf · 29th June 2004, 11:22 AM

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.

peranders · 30th June 2004, 06:28 AM

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.

27th June 2004, 11:59 AM	#1
Frazzled diyAudio Member Join Date: Apr 2004 Location: Regina, Saskatchewan	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. __________________ Anything worth trying is worth failing at once or twice.

28th June 2004, 02:36 AM	#2
Frazzled diyAudio Member Join Date: Apr 2004 Location: Regina, Saskatchewan	bump __________________ Anything worth trying is worth failing at once or twice.

28th June 2004, 09:08 PM	#3
Frazzled diyAudio Member Join Date: Apr 2004 Location: Regina, Saskatchewan	bump last time __________________ Anything worth trying is worth failing at once or twice.

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28th June 2004, 09:11 PM	#4
Wes Marquenie diyAudio Member Join Date: Jan 2003 Location: Enschede	BG N or MKP

28th June 2004, 09:12 PM	#5
mirlo diyAudio Member Join Date: Jul 2002 Location: San Diego	Without knowing more about your application, I'd suggest polypropylene, or if you cant afford the $$ or space, polyester or (high quality) electrolytic.

28th June 2004, 09:34 PM	#6
sss diyAudio Member Join Date: Jul 2003 Location: Israel , haifa	poliyester will work fine

29th June 2004, 11:22 AM	#8
johnf diyAudio Member Join Date: Jun 2004 Location: Bremerhaven	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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