[sdiy] Newbie question: Diode ladders

[Tim Ressel]

Scott,

When you say "signal applied to the control element"
do you mean the audio path and not the control
voltage? There is the case of filters's gain
increasing as Q increases, requiring the input to be
reduced to avoid clipping at peak resonance. An
example would be the Paia design where the 'Q' pot was
dual-gang: one part ran 'Q' up while the other
attenuated the input. Those clever Paians.

In the case of 3080's, its just cause they have oddles
of gain.

--TimR



--- Scott Gravenhorst <music.maker at gte.net> wrote:

> Sticking my face back in here - seems like the
> nonsense is over, hopefully
> it will stay that way.
> 
> Question about VCFs in general:  I have taken notice
> that many, maybe most
> VCF designs require a rather low signal level
> applied to whatever control
> elements are used for tuning.  Diodes, BJTs, FETs,
> OTAs, MOSFETs, all seem
> to need attenutation (what about vactrols?) to avoid
> distortion.  Is the
> acceptable signal level applied at this point
> similar or the same for each
> of these techniques?  
> 
> Can someone give basic approximate figures for what
> levels are acceptable
> for each kind?
> 
>
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