Favorite film capacitors for DC blocking? - Page 2

jacco vermeulen · 18th November 2006, 07:45 AM

I'll add a few more which are easy to get ;
Vishay Roederstein KC1850, KC1858, and MKC1860 series polycarbonate caps.
Not cheap, a 1uF MKC1860 is like $3.50/pc.

Nordic · 20th November 2006, 02:29 PM

Sorry to dredge up an old post again, but I took my amp appart for a reboxing. And I noticed the caps are marked
FP-CA-AU...

Would the AU indicate gold...? don't know if gold foil caps exist, but I guess the leads could well be goldplated

Damon Hill · 20th November 2006, 09:59 PM

About the only application for capacitors with gold plates I could think of is very high temperature glass capacitors; literally layers of very thin glass and metal foil that are heated until they fuse together. I have seen a very few glass/tin capacitors, usually in picofarad values. I can't imagine any other application; gold isn't that good a conductor and would only be useful to prevent surface oxidization.

Nordic · 21st November 2006, 05:13 AM

Thanks, I sent them a mail, but the gentleman dealing with these enquiries, will only return later in the week... it is probably only the leads if anything... but they have very thick isolation on... the leads and body basicaly are encapsulated in a sealed rubbery plastic layer - it just screams quality and functionality at you.

oncle_tom · 1st December 2006, 02:44 PM

Hi,

Cornell Dubilier WWP-Caps are very good for couppling.

Peter

jackinnj · 1st December 2006, 02:56 PM

I like WIMA, but they can be hard to get in the States. Mouser and Future carry them, but are often out of stock.

I have a stash of 4.7u/400V MKP4's which I used on the LastPAS regulator boards made for a group buy about a year ago.

jacco vermeulen · 1st December 2006, 04:16 PM

Jack,

Wonna hear something ironic ?
Wima MKP4 and MKP10 could be bought around the corner here 15-20y ago, relatively affordable too, but were just about the last ones to use.

AndrewT · 1st December 2006, 04:34 PM

Hi,
I wonder if the MKP from Wima are the self healing type that use a mixture of foil and metallised and run caps in series and an interlayer that is not polypropylene?

Some or all of these attributes might explain why they came at the end of your preference.

Nordic · 1st December 2006, 04:37 PM

The crossover on my speakers that are close to 30 years old have those red wima mkp caps in... counldn't believe they are that old...

I have compared wima's to ampohms and where space allows the second lgets my prefference by a long shot.

18th November 2006, 07:45 AM	#11
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	I'll add a few more which are easy to get ; Vishay Roederstein KC1850, KC1858, and MKC1860 series polycarbonate caps. Not cheap, a 1uF MKC1860 is like $3.50/pc. __________________ Looks like Sponge Bob has killed another thread.

1st December 2006, 04:16 PM	#17
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Jack, Wonna hear something ironic ? Wima MKP4 and MKP10 could be bought around the corner here 15-20y ago, relatively affordable too, but were just about the last ones to use. __________________ Looks like Sponge Bob has killed another thread.

1st December 2006, 04:34 PM	#18
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, I wonder if the MKP from Wima are the self healing type that use a mixture of foil and metallised and run caps in series and an interlayer that is not polypropylene? Some or all of these attributes might explain why they came at the end of your preference. __________________ regards Andrew T.

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20th November 2006, 02:29 PM	#12
Nordic diyAudio Member Join Date: Sep 2005	Sorry to dredge up an old post again, but I took my amp appart for a reboxing. And I noticed the caps are marked FP-CA-AU... Would the AU indicate gold...? don't know if gold foil caps exist, but I guess the leads could well be goldplated

20th November 2006, 09:59 PM	#13
Damon Hill diyAudio Member Join Date: Mar 2001 Location: Auburn, WA (somewhere between Seattle and Tacoma) Blog Entries: 1	About the only application for capacitors with gold plates I could think of is very high temperature glass capacitors; literally layers of very thin glass and metal foil that are heated until they fuse together. I have seen a very few glass/tin capacitors, usually in picofarad values. I can't imagine any other application; gold isn't that good a conductor and would only be useful to prevent surface oxidization.

21st November 2006, 05:13 AM	#14
Nordic diyAudio Member Join Date: Sep 2005	Thanks, I sent them a mail, but the gentleman dealing with these enquiries, will only return later in the week... it is probably only the leads if anything... but they have very thick isolation on... the leads and body basicaly are encapsulated in a sealed rubbery plastic layer - it just screams quality and functionality at you.

1st December 2006, 02:44 PM	#15
oncle_tom diyAudio Member Join Date: Dec 2005 Location: near frankfurt/main	Hi, Cornell Dubilier WWP-Caps are very good for couppling. Peter

1st December 2006, 02:56 PM	#16
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	I like WIMA, but they can be hard to get in the States. Mouser and Future carry them, but are often out of stock. I have a stash of 4.7u/400V MKP4's which I used on the LastPAS regulator boards made for a group buy about a year ago.

1st December 2006, 04:37 PM	#19
Nordic diyAudio Member Join Date: Sep 2005	The crossover on my speakers that are close to 30 years old have those red wima mkp caps in... counldn't believe they are that old... I have compared wima's to ampohms and where space allows the second lgets my prefference by a long shot.

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