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<DIV><FONT face=Arial size=2>IMO rubbish.</FONT></DIV>
<DIV><FONT face=Arial size=2>As a buffer cap for power supply decoupling a elco
will do fine.</FONT></DIV>
<DIV><FONT face=Arial size=2>Only in High-end equipment aimed
at gold-eared bimbos MKS are sometimes used as power
buffer, marketing claim could be that this
gives more depth to the silence.</FONT></DIV>
<DIV><FONT face=Arial size=2>Obviously nonsense, only manually rolled
paper/silver foil caps filled with 5 times filtered hand pressed chestnut oil
are acceptable.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Think for signal coupling in a synth a elco would
do, that is if there are no polarity issues.</FONT></DIV>
<DIV><FONT face=Arial size=2>As you mention 10u is rather large. Usually the
large caps are needed to prevent low frequency loss when input "resistance" of
the next stage is low.</FONT></DIV>
<DIV><FONT face=Arial size=2>Maybe you can redesign for use of a 1u
MKS?</FONT></DIV>
<DIV><FONT face=Arial size=2>Often the cap and input "resistance" form a RC
HP filter. </FONT></DIV>
<DIV><FONT face=Arial size=2>The cutoff would be </FONT><FONT face=Arial
size=2>f = 1/(2piRC) </FONT></DIV>
<DIV><FONT face=Arial size=2>So if you need 15hz to pass you need a
</FONT><FONT face=Arial size=2>C = 1/(2pi*R*10) capacitor.</FONT></DIV>
<DIV><FONT face=Arial size=2>In this case if it needs to be 10u then go for the
elco.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>In general for signal coupling a plastic cap
like MKS or MKP type would be the quality choice.</FONT></DIV>
<DIV><FONT face=Arial size=2>Silvermica would be highend for mic amps and
critical stuff.</FONT></DIV>
<DIV><FONT face=Arial size=2>Paper/oil the pick for pp who need expensive stuff
to show other pp they have very good ears.</FONT></DIV>
<DIV><FONT face=Arial size=2>But commercial HIFI equipment often uses
ceramics or even elcos.</FONT></DIV>
<DIV><FONT face=Arial size=2>So take your pick.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Our Happy Hairy Harry wrote a cap guide that
is on line at multiple sites.</FONT></DIV>
<DIV><FONT face=Arial size=2>Don't have a link at hand, but sure others
will mention it.</FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>HTH</FONT></DIV>
<DIV><FONT face=Arial size=2>Theo</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=makoot@gmx.net href="mailto:makoot@gmx.net">M.A. Koot</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=synth-diy@dropmix.xs4all.nl
href="mailto:synth-diy@dropmix.xs4all.nl">synth-diy@dropmix.xs4all.nl</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, July 18, 2004 3:34 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [sdiy] (de)coupling
capacitors</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Hi all,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>This subject has probably allready been
discussed, but I'm affraid my synth-DIY database isn't large enough to find
that may-have-past discussion.</FONT></DIV>
<DIV><FONT face=Arial size=2>The situation is that I'm building a
filtercircuit which has a coupling and decoupling capacitor of 10uF. This is
rather large, and since I believe these capacitors have to be rather good, I'm
questioning myself what kind of capacitor would be best.</FONT></DIV>
<DIV><FONT face=Arial size=2>In fact, what capacitor would be overal best for
coupling/decoupling functions? Styroflex maby?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Since this particular one is that large, I can
use a electrostatic one (bad, isn't it?), or an expensive MKS one. Could
anyone maby tell me if it's worth the price to buy a MKS, or
better, does one hear actually a difference using MKS instead of
electrostatic, or is that just rubbish?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Cheers,</FONT></DIV>
<DIV><FONT face=Arial size=2>Michiel</FONT></DIV></BLOCKQUOTE></BODY></HTML>