[sdiy] Boards for a parametric EQ?

[Andre Majorel]

On 2008-09-12 11:16 +0200, ChristianH wrote:
> On Fri, 12 Sep 2008 10:54:26 +0200 Andre Majorel <aym-htnys at teaser.fr> wrote:
>
> > Just saw the Moog three band parametric EQ schematics :
> > 
> >   http://files.muziq.be/schematics/moog_pareq.jpg
> > 
> > The frequency controls are dual gang 100 k pots used as variable
> > resistors. The schematics do not say "log" or "anti-log" which
> > implies they're linear. And yet the angle-frequency relationship
> > is exponential :
> > 
> >   http://www.scale.gs/MoogParaEQ00.jpg
> > 
> > Is this possible ?
> 
> Well, in the Mini schematics, all the mixer level pots don't have a
> specific log marking either. May be they implied log where it's kind of
> obvious? I mean, audio level pots are usually the prime example for
> using log pots.

Yeah, thought of that but the "width" (Q) pots are duly labelled
"AUD" so...

« ... and this year's Most Productive Employee Award goes to
Irving C. Saltzberg Jnr who saved no less than EIGH-TY SE-EVEN
SECONDS by skipping the LIN and LOG suffixes in his drawings. »

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
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