Advantage of tin foil caps ?

Bernhard · 4th March 2004, 09:37 PM

Are they better for some reason ?

thomas997 · 5th March 2004, 02:33 AM

"Although significantly heavier, tin foil is generally preferable to aluminum foil, although the degree of improvement is debatable. Presumably, this is due to fact that tin is softer, resulting in less residual stress and reduced susceptibility to microphonics."

Lots of info here:

http://ldsg.snippets.org/appdx-ec.php3

I doubt its much better (than al foil), maybe if you want the "best".

thoriated · 5th March 2004, 04:09 AM

Good site overall, but why does he keep saying that polystyrene has a lower dielectric constant than polypropylene when the opposite is true? Polystyrene has a K of 2.5-2.6; polypropylene has a K of 2.1-2.2 and teflon has a K of 2.0 - 2.1.

Aside from this, it looks like a very informative site.

Bernhard · 5th March 2004, 06:39 AM

My idea was that in the case of tin foil caps, the leads may be directly soldered to the foil.

The contact to aluminum is always questionable. And its different materials which might make a "battery".

4th March 2004, 09:37 PM	#1
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	Advantage of tin foil caps ? Are they better for some reason ?

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5th March 2004, 02:33 AM	#2
thomas997 diyAudio Member Join Date: Feb 2004 Location: Vancouver	"Although significantly heavier, tin foil is generally preferable to aluminum foil, although the degree of improvement is debatable. Presumably, this is due to fact that tin is softer, resulting in less residual stress and reduced susceptibility to microphonics." Lots of info here: http://ldsg.snippets.org/appdx-ec.php3 I doubt its much better (than al foil), maybe if you want the "best".

5th March 2004, 04:09 AM	#3
thoriated diyAudio Member Join Date: Nov 2003 Location: flyover country	Good site overall, but why does he keep saying that polystyrene has a lower dielectric constant than polypropylene when the opposite is true? Polystyrene has a K of 2.5-2.6; polypropylene has a K of 2.1-2.2 and teflon has a K of 2.0 - 2.1. Aside from this, it looks like a very informative site.

5th March 2004, 06:39 AM	#4
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	My idea was that in the case of tin foil caps, the leads may be directly soldered to the foil. The contact to aluminum is always questionable. And its different materials which might make a "battery".

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