What's default caps?

[G-Sun]

Hi!

I'm looking at the BOM for the SSL9k.

It's just stating Capacitors, and values.

What's sort of default caps?

And for the Electolitic Capacitors, is that:
Aluminium Electrolytic ?

Thanks!

 

[gemini86]

What do you mean by default. There is no default. Value, voltage, lead spacing and cost are the variables here. Use mouser's search function to find what you need.

And yes, aluminum electros are what you seek.

 

[G-Sun]

Thanks!

What do you mean by default. There is no default. Value, voltage, lead spacing and cost are the variables here. Use mouser's search function to find what you need.

Yes, I understand value, voltage and lead spacing. But, when I look at Farnell http://no.farnell.com/jsp/search/browse.jsp?N=2022+202739&Ntk=gensearch&Ntt=cap&Ntx=mode+matchallpartial
there's so man different types.
What do I need to know regarding cost and quality?

 

[kante1603]

Hi,

here´s a quick listing of the caps I used:

Caps
2.2uf 100V poly 10-20mm         C55,69
2.2uf 63V         poly 7.5-10mm         C68,84
470nf         poly 5mm                 C38,39,64,65,93,94
100nf         Ceramic/poly 5mm C45,C63,C85,CX,CX
470pf         poly 5mm                 C59,83
330pf         poly 5mm                 C57,58,71,82
100pf         poly 5mm                 C56,61,70,86
10pf                 ceramic 5mm         C48
3.3pf                 ceramic 5mm         C46,47,73,74
220uF 25V Electrolytic 5mm C34,62,92
10uf 25V         Electrolytic 5mm C72

Poly means "Polyester" or -film caps (I prefer WIMA).These are the red ones in the attached pic.
Electrolytics are the bigger round ones (you want "RADIAL",axial means they would lay flat on their side-so won´t fit),ceramics are the very small ones.Don´t search for C63,it´s mounted on the bottom side.

Hope to have helped,

best regards,

Udo.

 

[gemini86]

Caps fall into several categories. Electrolytic, film, and ceramic are the main groups.

Film could be polyester, polypropylene, polystyrene, etc...

polyprops are generally used up to 1uF. Then they get expensive after that.
Polyester take over after that, generally speaking.

aluminum electros are used as large power reserves, power supply decoupling, filtering etc. They are often bypassed with film caps to bring ESR down and help with higher frequency filtering.

Ceramics come in a lot of flavors, but the most popular (and cheapest, as far as through-hole components go) are ceramic disc types. When used directly in audio signal paths, some prefer to use silver mica instead.
They are often used for very small values, in the pF range.

As far as brands and quality, That's very subject to experience, and opinion. Most prefer WIMA for film caps. Panasonic and Nichicon make some good electros, I don't have a preference for ceramics, but I usually use vishay because they're decent quality and cheap. Hope some of that helps...

 

[G-Sun]

Thanks! Now we're getting there.
So hard to know these things when newbie

 

[jsteiger]

Popular electrolytic caps are Nichicon HE series & Panasonic FC or FM series. 

 

[gemini86]

For vintage type stuff I like the bc/vishay mal series.

 

[G-Sun]

Thanks!
Is there somewhere the caps have bigger/less impact on the sound. Like some places it's ok to use cheaper stuff, some places it pays of to buy expensive stuff?

 

[gemini86]

It really depends on the build and your ears. Some are perfectly happy with cheap stuff, others swear by high dollar boutique caps. My opinion, just don't skimp on quality where a cap sees a lot of stress. Like in a psu. High ear or insufficient voltage rating will make a cap pop early in life. (See behringer)

 

[G-Sun]

Hi,

here´s a quick listing of the caps I used:

Caps
2.2uf 100V poly 10-20mm         C55,69
2.2uf 63V         poly 7.5-10mm         C68,84
470nf         poly 5mm                 C38,39,64,65,93,94
100nf         Ceramic/poly 5mm C45,C63,C85,CX,CX
470pf         poly 5mm                 C59,83
330pf         poly 5mm                 C57,58,71,82
100pf         poly 5mm                 C56,61,70,86
10pf                 ceramic 5mm         C48
3.3pf                 ceramic 5mm         C46,47,73,74
220uF 25V Electrolytic 5mm C34,62,92
10uf 25V         Electrolytic 5mm C72

Poly means "Polyester" or -film caps (I prefer WIMA).These are the red ones in the attached pic.
Electrolytics are the bigger round ones (you want "RADIAL",axial means they would lay flat on their side-so won´t fit),ceramics are the very small ones.Don´t search for C63,it´s mounted on the bottom side.

Hope to have helped,

best regards,

Udo.

This post has just been very helpful to me, pictures and all. Thanks a lot!

 

[kante1603]

This post has just been very helpful to me, pictures and all. Thanks a lot!

You´re welcome