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Old 26th April 2013, 02:47 AM   #1
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Default Wima MKP

Hey All,

Mouser sells MKP1, 4 and 10. Can anyone tell me which would be best as coupling caps in a Dynaco pAS3?

Kevin
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Old 26th April 2013, 03:34 AM   #2
Jay is offline Jay  Indonesia
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For signal coupling MKP10 is best but the size is big. For power supply decoupling MKS4 is more popular than MKP1,4.
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Old 26th April 2013, 05:42 AM   #3
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Mouser also sells WIMA FKP1 Foil/Film caps. They are just a little bigger than the MKP10 series caps and better as they are foil and not metalized like the MKP series. WIMA's are in general smaller than other brands of comperable capacitors.
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Old 26th April 2013, 10:31 AM   #4
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I've checked Mouser and they don't have the appropriate values in FKP. In MKP they are all listed as 'AC Pulse, Suppresion" that doesn't sound right for aC coupling does it?
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Old 26th April 2013, 11:14 AM   #5
SY is offline SY  United States
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FKP does not bring any advantage for coupling caps. They have advantages in high current, high ripple application. MKP will work fine for this.
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Old 26th April 2013, 11:16 AM   #6
Salas is offline Salas  Greece
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Quote:
Originally Posted by mr2racer View Post
I've checked Mouser and they don't have the appropriate values in FKP. In MKP they are all listed as 'AC Pulse, Suppresion" that doesn't sound right for aC coupling does it?
They just highlight their properties for SMPS etc. Of course they can couple well when they can store and release high energy with fast and cool action in demanding pulse applications. In industrial capacitors the things they prioritize are different than in boutique audio caps. Form factor, value density, durability, dimensional and spec stability, self healing, all that VS cost. Its their high volume production and professional applications they keep them sanely priced, not the R&D and production facilities behind them ain't top notch. To the contrary. Just not specialized for audio.
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Old 26th April 2013, 11:55 AM   #7
Jay is offline Jay  Indonesia
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Quote:
Originally Posted by SY View Post
FKP does not bring any advantage for coupling cap.
Yeah, to my ears they actually sound worse too
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Old 26th April 2013, 04:20 PM   #8
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Wow... And I always thought FKP's were better. Good to know...
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Old 26th April 2013, 04:46 PM   #9
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Isn't the difference between FKP and MKP that the former is film and foil, and the latter is metallized film?
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Old 26th April 2013, 05:08 PM   #10
SY is offline SY  United States
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Exactly. Both will work equally well as coupling caps, but the MKP will be smaller and less expensive, as well as available in a wider range of values. For switching supply bypass and crossovers, the FKP may show some advantages.
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