[sdiy] Passive filters and impedances

[Mattias Rickardsson]

Den 31 okt. 2015 10:38 em skrev "Tom Wiltshire" <tom at electricdruid.net>:
>
> I've used the "x10 values" trick for actual passive filters I've built,
and that's all good.
>
> On 31 Oct 2015, at 17:07, "Richie Burnett" <rburnett at richieburnett.co.uk>
wrote:
> >
> > ..., a good way to reduce the un-wanted interactions is to make the
impedance of each RC filter stage about 10 times greater than the impedance
of the preceding stage.

When saying the impedance, do you mean the resistance?

x10 for R, and x0.1 for C?

Otherwise the filter will be some opposite of a brickwall filter...
Japanese shōji paper wall filter perhaps. :-)

/mr
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