[sdiy] Filter Not so strangeness

[Scott Gravenhorst]

The circuit has no emitter resistor, so there is no capacitor across it. 
"Across" means "in parallel with".  Perhaps the text you read referenced a
different filter?

"Pat Kammerer" <spivkurl at wearerecords.com> wrote:
>Well,
>
>I ditched the sallen key filter I was working on, mainly because I had made
>just couple more mistake than I felt like fixing.  : )  So I've been looking
>around at different designs.
>
>I've thrown together a PAIA 2720 VCLF  (I know...), and I love the sound,
>much stronger and less noisy than the other. It also seems to like single
>polarity supply.
>
>http://www.muzique.com/schem/2720-3l.gif
>
>My question now is to anyone who may have built this into a module or
>whatever;
>
>I've read that to control resonance in this circuit you need a pot in series
>with the bypass capacitor that is across the emitter resistor.  I don't see
>this cap in the schematic unless I'm misunderstanding the word across  (?!)
>Or is the bypass cap the one at the supply input (100uf)?  I would like this
>option as it would make the sound much more versatile.  Theoretically,
>instead of voltage control for cutoff I could use a varying resistance from
>the two .05p caps to ground right, since the voltage creates a varying
>restance using the 1n914's?
>
>Fun simple circuit though.
>
>Thanks for your help
>

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