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-   -   wima polyester or polypropylene cap? (http://www.diyaudio.com/forums/parts/204509-wima-polyester-polypropylene-cap.html)

lanchile 14th January 2012 06:12 PM

wima polyester or polypropylene cap?
 
Hi. I would like to use a 4.7uf 50v wima cap in the input circuit of an amp. but My question is if there is a difference in quality or sound of these two kind of polyester/polypropylene caps. I only have 5mm approximate for the connections of terminals. or should I just get bigger/better caps and use wires to connect them on boards? I have never use them,How are these Wima caps?

SY 14th January 2012 06:44 PM

Wima makes excellent capacitors. The polypropylene would be a better choice in that position.

lanchile 14th January 2012 06:56 PM

Thanks SY, now the problem is if I get the polypropylene they are bigger than 5mm. Mouser does not have in the 5mm, they only have the polyester in 5mm. I found some Wima 5mm polypropylene in ebay but I am not so sure if they sell original ones. I have to keep searching for a store that sell original Wima.:confused:

discrete 14th January 2012 08:16 PM

Quote:

Originally Posted by lanchile (Post 2861923)
I found some Wima 5mm polypropylene in ebay but I am not so sure if they sell original ones. I have to keep searching for a store that sell original Wima.:confused:

MKP2s only go up to 0.33 uF:

WIMA

I use MKS2 (polyester) capacitors for the input high pass in power amps.
MKPs tend to get bulky and makes it difficult to keep the input network compact (which IMHO is important to minimize noise pickup in a power amp).

lanchile 14th January 2012 08:33 PM

Quote:

Originally Posted by discrete (Post 2862031)
MKP2s only go up to 0.33 uF:

WIMA

I use MKS2 (polyester) capacitors for the input high pass in power amps.
MKPs tend to get bulky and makes it difficult to keep the input network compact (which IMHO is important to minimize noise pickup in a power amp).

That MKS2 is the one I wanted to use from Mouser. But I am not sure if I should get a better one like Kimber,Auricap,Sonic cap etc and just solder the wires to the 5mm space terminal in the amp board.:confused:

SY 14th January 2012 08:39 PM

In what way are those caps "better"? Other than profit margin?

lanchile 14th January 2012 08:55 PM

Quote:

Originally Posted by SY (Post 2862057)
In what way are those caps "better"? Other than profit margin?

Good point! I just assumed that the other costs more money because of the material,winding methods,tolerance etc that make them be "better". I think there must be a bad,good and better caps right? like in everething else in this world.

PS: I just need some "good" and "reliable" 4.7uf NP 50v caps. to replace some Panasonic Fc in the input signal that are installed right now.

SY 14th January 2012 09:04 PM

Quote:

Originally Posted by lanchile (Post 2862077)
I just assumed that the other costs more money because of the material,winding methods,tolerance etc that make them be "better". I think there must be a bad,good and better caps right?

Mostly, it's a matter of market segment. The best caps are those made with very tight winding, solid potting, and reliable leadouts. That means "major manufacturer."

PMA 14th January 2012 09:11 PM

Here you will find WIMA polyprops 4.7uF

WIMA

They "sound" definitely better than the polyester types.

lanchile 14th January 2012 09:24 PM

2 Attachment(s)
As you can see in pictures ,I do not have to much space on board to use big caps. Cap #1 is the one I have to use the 4.7uf at least 50v. the Wima polypropylene are wider than 5mm from terminal wires. that is why I was thinking of using the others caps put it as close as I can and just solder terminals.


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