[sdiy] Re: Kemet Multilayer (was Walt Jung and Richard Marsh's Capacitors article)

[harry]

Hi Chris...

Depends on where you use them...
For the S/H I'd go with the polystyrene... the dielectric
absorption is just a little better.  Or do you mean for the
DAC multiplexer ??? I'd go polystyrene there for sure...

Are the Kemet a temperature stable variety ???  They ARE
rugged.  We use them for decoupling... and even to simulate the
gates of very large IGBTs... they are really tough and take a hell
of a lot of AC dissipation.  But for audio I'm not sure.

For something like a noise source... why not ???

BTW are the MiniModulars no longer available as kits ???  That would
be too bad... I've enjoyed mine a lot. I do everything but tune it !!!

H^)  harry

Chris MacDonald wrote:

> Anyone else tried the Kemet "Golden Max" Multilayer ceramics?  I now use
> a few in the MM to replace some (relatively) big and expensive micas.  I
> was considering the NPO variety for the S/H in the MIDI/CV as well.
> They are a bit more expensive than polystyrene (at .01uF), but they are
> MUCH smaller than any other .01 I can find (which is advantageous in
> this instance).  Am I nuts?  :)
>
> -Chris
>
> harry wrote:
> >
> > Besides the distortion of the ceramic cap (which MAY not be so bad considering
> > that it is voltage dependant... and many apps are very low signal voltage)
> > there is
> > the often terrible value change with temperature...
> >
> > OTOH if it is a guitar fuzzbox who cares ???
> >
> > H^) harry